Heating and Air Conditioning - Repair BMW Z4 E89

64 00 000 Information on using cleaning agent/paints (personal protection equipment)

First Aid

1. If product comes in contact with eyes, immediately flush with running water for about 10 - 15 minutes. Seek the advice of eye specialist.
2. In the event of skin contact and where applicable an allergic skin reaction, clean the affected areas immediately with soap and water and then apply silicone-free skin cream. Seek advice of physician.
3. If an adhesive product is swallowed, rinse mouth/parts of mouth thoroughly with running water. Drink 1-2 glasses of water. Do not induce vomiting. Consult a doctor.
4. After inhaling vapors ensure ample supply of fresh air. Keep calm, keep respiratory tracks clear and call doctor.

Recycling

Dispose of cleaning agents/paints in a professional manner!

Observe national/country-specific disposal regulations.

Scheme 9

1. Heater/air conditioner with add-on parts
2. Remove fan for heater - A/C system
3. Compressor for A/C system
4. Fan for heater - A/C system
5. Desiccant bottle for A/C system
6. Expansion valve

00 Safety information for working on vehicles with automatic engine start-stop function (MSA)

Observe safety precautions when working on MSA vehicles

Before carrying out practical work on the engine, always ensure that the MSA functionality is deactivated so as to prevent automatic engine starting while work is being carried out in the engine compartment.

Scheme 10

1. Deactivate MSA by means of button (1) in passenger compartment
2. Open seat belt buckle and driver's door
3. Open engine bonnet/hood and ensure that engine hood/bonnet contact is not in workshop mode Workshop mode A = 10 mm Basic setting (engine hood/bonnet open) B = 7 mm To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.

Scheme 11

When working with diagnosis tools

1. Observe instructions in diagnosis tool

64 11... Installing servodrive

Installation

If necessary, align shaft of flap(s) to be actuated to position of servodrive to be installed.

Scheme 12

Scheme 13

1. Actuator drive, blending flap (automatic A/C)
2. Actuator drive, air mixing flap (left, automatic air A/C)
3. Actuator drive, footwell flap (automatic A/C)

Note. The High equipment specification heater/air conditioner is pictured!

Scheme 14

1. Actuator drive, defrosting flap (automatic A/C)
2. Actuator drive, ventilation flap (automatic A/C)
3. Actuator drive, fresh-air/recirculated-air flap
4. Actuator drive, air mixing flap (right, automatic air A/C)

Note. The High equipment specification heater/air conditioner is pictured!

Scheme 15

64 11 377 Removing and installing (replacing) control panel for heating and air conditioning system

Necessary preliminary tasks

1. Remove «RIGHT INSTRUMENT PANEL TRIM»(ref-381258-S13175965192010122800000)

Replacement

Release screws (1).

Remove air conditioning control panel (2) from instrument panel trim (3).

Scheme 16

Replacement

Carry out vehicle programming/coding .

64 11 992 Removing and installing or replacing solar sensor

Unclip trim (1) with special tool from catches and remove towards top.

Scheme 17

Installation

Retainers (1) on speaker trim (2) must be correctly seated on associated lugs and must not be damaged.

Scheme 18

Unclip cover (1).

Remove speaker trim (2).

Unclip solar sensor (3) downwards from speaker trim (2).

Installation

Retaining lugs on cover (1) and solar sensor (3) must not be damaged.

Scheme 19

64 11 872 Removing and installing/replacing actuator drive for blending flap (left, automatic air conditioning)

Necessary preliminary work

1. Remove «TRIM FOR INSTRUMENT PANEL AT BOTTOM LEFT»(ref-381258-S32580396492010122800000)

Release screws (1).

Pull out actuator drive for blending flap (2).

Unlock plug connection (3) and disconnect.

Scheme 20

Replacement

Servomotors must be re-addressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Re-address flap motors

64 11 875 Removing and installing/replacing actuator drive for defrosting flap (automatic A/C)

Necessary preliminary work

1. Remove «HEATER/AIR CONDITIONER FAN»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-213-removing-and-installingreplacing)

Release screws (1).

Pull out actuator drive for defroster flap (2).

Unlock plug connection (3) and disconnect.

Scheme 21

Replacement

Servomotors must be re-addressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Re-address flap motors

64 11 806 Removing and installing/replacing actuator drive for fresh-/recirculated air flap

Necessary preliminary work

1. Remove «RIGHT GLOVE BOX WITH HOUSING»(ref-381258-S25833378562010122800000) .

Release screw (1).

Fold down passenger compartment power distribution box (2).

Scheme 22

Release screws (1).

Unfasten plug connection (2) and disconnect.

Remove actuator drive for fresh-air/recirculated air flap (3).

Scheme 23

Replacement

Servomotors must be re-addressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Re-address flap motors

64 11 869 Removing and installing/replacing actuator drive for ventilation/stratification flap (automatic air conditioning)

Necessary preliminary work

1. Remove «INSTRUMENT PANEL TRIM AT BOTTOM LEFT»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-213-removing-and-installingreplacing)

Release screws (1).

Pull out actuator drive for defroster flap (2).

Unlock plug connection (3) and disconnect.

Scheme 24

Replacement

Servomotors must be re-addressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Re-address flap motors

64 11 909 Removing and installing/replacing footwell temperature sensor

Necessary preliminary tasks

1. Remove «TRIM FOR INSTRUMENT PANEL AT BOTTOM LEFT»(ref-381258-S32580396492010122800000)

Remove footwell duct (1).

Scheme 25

Disconnect plug connection (1).

Turn temperature sensor (2) at plug socket as far as it will go.

Feed temperature sensor (2) out of footwell duct.

Installation

Make sure temperature sensor (2) is correctly engaged in footwell duct.

Scheme 26

64 11 213 Removing and installing/replacing heater/air conditioner fan

Necessary preliminary tasks

1. Remove «RIGHT GLOVEBOX WITH HOUSING»(ref-381258-S25833378562010122800000)

Remove air duct (1).

Unfasten plug connection (2) and disconnect.

Scheme 27

Raise lug (1).

Release fan motor (2) in direction of arrow.

Scheme 28

Pull fan motor (1) forwards a little and then turn until controller (2) points downwards.

Feed out fan motor (2).

Scheme 29

64 11 205 Removing and installing/replacing heating unit (N52K)

Necessary preliminary tasks

1. «DRAW OFF REFRIGERANT FROM A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)
2. «REMOVE CARRIER FOR INSTRUMENT PANEL»(ref-381258-S42736799232010122800000)

Recycling

Coolant emerges when coolant lines are detached. Have a suitable collecting container ready.

Catch and dispose of escaping coolant.

Observe country-specific waste-disposal regulations.

Release screw (1) on bulkhead (2).

Pull holder (3) out of rubber.

Scheme 30

Release hose clamps (1) and detach coolant hoses (2).

Release screws (3) and detach refrigerant lines (4) in direction of arrow.

Tightening torque 64 53 2AZ .

Installation

Replace sealing rings.

Use special tool 00 9 030 Keil to mount sealing rings without damaging them.

Installation

Make sure bulkhead grommet is correctly seated.

Scheme 31

Remove heating unit (1) in direction of arrow.

Installation

If necessary, replace seal (2) and seals between heater (1) and bulkhead.

Make sure condensate drain grommet (3) is correctly seated in mounting.

Make sure heater (1) is correctly seated in condensate drain grommet (3).

Scheme 32

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) .
2. Vent cooling system and check for water leaks See «1700039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-039-venting-and-filling) or «1700009 CHECKING COOLING SYSTEM FOR LEAKS (N54, N52K)»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-009-checking-cooling-system) .

64 11 205 Removing and installing/replacing heating unit (N54)

Necessary preliminary tasks

1. «DRAW OFF REFRIGERANT FROM A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)
2. «REMOVE CARRIER FOR INSTRUMENT PANEL»(ref-381258-S42736799232010122800000)

Recycling

Coolant emerges when coolant lines are detached. Have a suitable collecting container ready.

Catch and dispose of escaping coolant.

Observe country-specific waste-disposal regulations.

Release hose clamps (1) and detach coolant hoses (2). Release screws (3) and detach refrigerant lines (4) in direction of arrow.

Tightening torque, see 64 53 2AZ in 64 53 REFRIGERANT LINES AND EXPANSION VALVE .

Installation: Replace sealing rings. Use special tool 00 9 030 to mount sealing rings without damaging them.

Installation: Make sure bulkhead grommet is correctly seated.

Scheme 33

Remove heating unit (1) in direction of arrow.

Scheme 34

Installation: If necessary, replace seal (2) and seals between heater (1) and bulkhead. Make sure condensate drain grommet (3) is correctly seated in mounting. Make sure heater (1) is correctly seated in condensate drain grommet (3).

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) .
2. Vent cooling system and check for water leaks . See «1700039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-039-venting-and-filling) or «1700009 CHECKING COOLING SYSTEM FOR LEAKS (N54, N52K)»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-009-checking-cooling-system) .

64 11 991 Removing and installing/replacing sensor for automatic recirculated air control (AUC sensor)

Lever out plastic slips (1) on cowl panel (3) at marked points.

Lever out plastic clip (2).

Raise cowl panel (3) until AUC sensor is accessible.

Scheme 35

Unlock AUC sensor (1) in direction of arrow and remove.

Unfasten plug connection (2) and disconnect.

Installation

Make sure AUC sensor (1) is correctly seated.

Scheme 36

64 11 871 Removing and installing/replacing servodrive for blending flap (right, automatic air conditioning)

Necessary preliminary tasks

1. Remove «HEATER/AIR CONDITIONER FAN»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-213-removing-and-installingreplacing)

Release screws (1).

Pull out servodrive for blending flap (2).

Unlock plug connection (3) and disconnect.

Scheme 37

Replacement

Servomotors must be readdressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Readdress flap motors

64 11 839 Removing and installing/replacing servodrive for footwell flap (automatic air conditioning)

Necessary preliminary tasks

1. Remove «TRIM FOR INSTRUMENT PANEL AT BOTTOM LEFT»(ref-381258-S32580396492010122800000)

Release screws (1).

Pull out servodrive (3).

Unfasten plug connection (2) and disconnect.

Scheme 38

Replacement

Servomotors must be readdressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Readdress flap motors

64 11 829 Removing and installing/replacing servodrive for ventilation flaps (automatic air conditioning)

Necessary preliminary tasks

1. Remove «HEATER/AIR CONDITIONER FAN»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-213-removing-and-installingreplacing)

Release screws (1).

Pull out servodrive for ventilation flaps (2).

Unlock plug connection (3) and disconnect.

Scheme 39

Replacement

Servomotors must be readdressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions

1. Body
2. Heating and air conditioning function
3. Flap motors
4. Readdress flap motors

64 11 906 Removing and installing/replacing ventilation temperature sensor (middle fresh-air grille)

Necessary preliminary tasks

1. Remove «CENTRE FRESH AIR GRILLE»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-22-165-removing-and-installing)

Turn temperature sensor (1) on plug socket in direction of arrow as far as it will go.

Feed temperature sensor (1) out of fresh-air duct (2).

Disconnect associated plug connection.

Installation

Make sure temperature sensor (1) is correctly engaged in fresh-air duct (2).

Scheme 40

64 11 225 Replacing controller for heating and A/C system fan

Necessary preliminary tasks

1. Remove «HEATER/AIR CONDITIONER FAN»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-213-removing-and-installingreplacing)

Release screws (1).

Tightening torque 64 11 3AZ .

Unfasten plug connection (2) and disconnect.

Remove controller (3) from fan motor housing (4).

Scheme 41

64 11 943 Replacing evaporator temperature sensor

Necessary preliminary tasks

1. Partially remove «EVAPORATOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-51-591-removing-and-installingrenewing)

Lever evaporator temperature sensor (1) out of corresponding guides on evaporator (2).

Scheme 42

64 11 970 Replacing fogging sensor

Expand two-part mirror base cover (1) by pressing from below and detach.

Feed out two-part mirror base cover (1) and remove.

Scheme 43

Disconnect plug connection (1).

Note. If necessary, carefully heat fogging sensor (2) with a hot air blower to approx. 40-60 °C.

Lift off fogging sensor (2) with special tool 00 9 317 and slowly pull off from windshield.

Installation

Bonding surface must be dry and free of dust and grease.

Scheme 44

Clean bonding surface with adhesive remover (sourcing reference: BMW Parts Service).

After cleaning, do not touch bonding surface with bare hands.

Pull off protective film completely from fogging sensor (3).

Place mounting template (1) as pictured on rain sensor (2).

Press fogging sensor (3) in direction of arrow with a contact pressure of > or =15 N/cm 2 onto inside of windshield.

Note. Firm thumb pressure attains approx. 30 N/cm 2 .

Scheme 45

Remove mounting template (1) carefully from fogging sensor (3).

L1- 009317 Keil

64 11 208 Replacing heater core

Necessary preliminary tasks

1. «REMOVE HEATER»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-205-removing-and-installingreplacing)

Release screw (1).

Tightening torque 64 53 3AZ .

Remove adapter plate (2).

Release screws (4).

Tightening torque 64 11 1AZ .

Remove bulkhead adapter (3).

Scheme 46

Release screw (1).

Remove retaining plate (2).

Pull out heater element (3) in direction of arrow.

Scheme 47

Scheme 48

64 22 137 Removing and installing or replacing left fresh-air grille

Necessary preliminary tasks

1. Remove «TRIM ON INSTRUMENT PANEL ON LEFT»(ref-381258-S30914342192010122800000)

Release screws (1).

Snap out fresh-air grille (2) in direction of arrow.

Scheme 49

64 22 165 Removing and installing or replacing middle fresh-air grille

Necessary preliminary tasks

1. Remove «RIGHT INSTRUMENT PANEL TRIM»(ref-381258-S13175965192010122800000)

Gently fold in

Central Information Display (1) manually.

Unfasten screws (2).

Pull out fresh-air grille (3) towards front.

Disconnect associated plug connections for hazard warning flashers and central locking.

Scheme 50

64 22 139 Removing and installing/replacing right fresh-air grille

Unclip decorative trim (1) as shown with special tool 00 9 317 on left and remove.

Scheme 51

Release screw (1) on fresh-air grille (2).

Scheme 52

Open glove compartment (1).

Release screws (2) at marked points.

Scheme 53

Unclip trim (1) as shown in area of fresh-air grille (2) and pull forwards slightly.

Snap out fresh-air grille (2) towards front and remove.

Scheme 54

Installation

Retaining clips (1) on fresh-air grille (2) must be correctly seated on associated lugs.

Scheme 55

Scheme 56

64 31 010 Replacing microfilter for interior ventilation

Note on cleaning

Spray microfilter housing from inside with BMW pollen filter housing cleaner.

COMPLY with notes and instructions on handling cleaning agents!

Wipe away excess liquid.

This kills off germs, bacteria and fungi that cause smells.

The smell that results on the plastic parts of the microfilter housing is eliminated.

Necessary preliminary work

1. Remove «TRIM FOR INSTRUMENT PANEL AT BOTTOM RIGHT»(ref-381258-S34209930902010122800000)

Unlock cover (1), slide in direction of arrow and remove towards bottom.

Installation note

Make sure guides (2) are correctly seated in rails (3).

Scheme 57

Pull out microfilter for interior ventilation (1) in direction of arrow.

Installation note

Make sure microfilter for interior ventilation (1) is in correct installation position (flow direction).

Scheme 58

Observe the following conditions prior to the A/C performance test

1. Provide a vehicle diagnostic system or. Safeguard electrical system integrity by checking the fault memory (no faults in the fault memory).
2. Provide a thermometer with separate gauge.
3. Perform the test in a suitable work bay with an ambient temperature between 20 °C and 30 °C.

Re 1

Connect diagnosis system to vehicle and display evaporator temperature.

Re 2

Position a thermometer with a separate gauge approx. 5 cm below the roof liner at the height of the B-pillar. Lay gauge outwards out of vehicle interior.

Re 3

Heat vehicle interior

1. "A/C button" is not activated during the heating process
2. Close all windows and doors.
3. Set recirculated air mode.
4. In A/C menu (MMI) in Air distribution index tab: select 100 % footwell for driver and front passenger and 100 % defrosting for driver (this applies here to driver and front passenger)
5. Maximum temperature setting (28 °C)
6. Maximum fan speed (adjust 9 pixels from 9 possible on front A/C control panel)
7. Run engine at approx. 2000 RPM until operating temperature is reached, then idle speed.

Air-conditioning efficiency measurement

Turn on A/C compressor via "A/C button" at a vehicle interior temperature of 50 °C.

Vehicles with MAX AC button ("MAX")

1. Activation of MAX AC (= maximum chilling capacity)

Vehicles without MAX AC button ("MAX")

1. Set maximum chilling capacity by means of following steps: Temperature setting = 16 °C Fan setting 9 pixels from 9 possible Stratification maximum cold (4 blue bars)

Evaporator sensor temperature must be < or = 15 °C after 3-4 minutes at approx. 2000 RPM.

DRAW OFF A/C SYSTEM if this temperature is not reached. Measure amount of refrigerant drawn off.

If drawn-off quantity does not correspond to SPECIFIED FILL QUANTITY : supplement refrigerant and repeat test.

If fill quantity is correct, continue troubleshooting by pressure measurement.

64 50 010 Drawing off, evacuating and filling heating and air conditioning system (R 134a)

Note. In case of complaints, carry out a heating and air conditioning performance test! If the system fails the test, draw off, evacuate and fill the heating and air conditioning system in accordance with the operating instructions of the relevant service station. It is essential to adhere to the service station service intervals.

Notes for drawing off heating and air conditioning system

To help separation of refrigerant and refrigerant fluid, run engine at low speed (800-1200 RPM) and with heating and air conditioning system turned on for a few minutes.

The limits the entrainment of refrigerant fluid while it is drawn off.

Drawn-off refrigerant fluid must be changed and reintroduced via the A/C service station.

Recycling

Dispose of drawn-off refrigerant fluid as hazardous waste.

Observe country-specific waste disposal regulations.

Notes for evacuating off heating and air conditioning system

Before each filling, evacuate the refrigerant system.

Observe an evacuation time of at least 30 minutes .

The evacuation procedure removes all traces of ambient air, water vapor and any other gases present from the heating and air conditioning system. This enables subsequent system filling with refrigerant.

If the vacuum does not remain stable when the system is off, run the procedure for leaks in the refrigerant circuit.

Notes for filling heating and air conditioning system

Before filling with refrigerant, replace the refrigerant fluid entrained during drawing off.

Also top up any lost fluid as indicated in the table

Loss of R134a refrigerant

Table 1 indicates the approved coolant loss after a certain period of time. This is no leak. Refrigerant fluid may not be topped up.

Table 2 indicates how much refrigerant fluid must be topped up after an unapproved coolant loss due to a leak after a specified period of time.

Different cases

1. Loss of refrigerant per Table 1 is not exceeded Top up lost R134a refrigerant It is not permitted to top up the refrigerant fluid
2. Loss of refrigerant per Table 1 is exceeded Top up lost R134a refrigerant Refrigerant fluid must be topped up additionally per Table 2

COOLANT LOSS REFERENCE CHART

REFRIGERANT FLUID TOP UP REFERENCE CHART

Follow NOTES FOR OPENING AND REPLACING PARTS in refrigerant circuit.

Depending on the type of component replaced on the heating and air conditioning system, it may be necessary to top up the refrigerant fluid, even if no measurable losses have occurred during drawing off. Follow the notes provided by the heating and air conditioning system manufacturer, taking account of the tolerances (and inaccuracies) indicated in the operating instructions of the relevant service station.

Information on the required refrigerant capacity for the entire heating and air conditioning system is contained on the type plate (1) in the engine compartment.

If necessary, refer to Technical Data for CAPACITY .

Scheme 59

Installation note

Reseal refrigerant filler necks on vehicle with sealing caps.

64 50... Instructions for handling refrigerant R 134a

Work on the refrigerant circuit may only be carried out by experts!

Installation

After each refill of an A/C system, check that the protective caps of the filler valves are hand-tight. They serve as additional seals.

Avoid all contact with liquid or gaseous R 134a. Wear protective goggles and gloves when working on the refrigerant circuit.

1. Follow «SAFETY INSTRUCTIONS»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-safety-instructions-for-handling) for handling R134a refrigerant.

As a gas, R 134a is colorless, odorless and heavier than air. If it enters the atmosphere, this may result in an imperceptible danger of asphyxiation or in cardiac palpitations, especially in workshop pits. Ventilate rooms adequately; if necessary, turn on installed extractor systems.

Store charged refrigerant pressure flasks in a place where they are not exposed to direct sunlight or any other heat source (max. 45 °C). Also avoid exposing them to mechanical stress (e.g. by dropping).

Do not weld or solder on to filled A/C systems or in rooms into which R 134a may have leaked. Exposure to flames or high temperatures (> or = 50 °C) may give rise to toxic decomposition products (fluorine gas). For this reason, do not smoke either.

In the event of fire, carbon dioxide (CO2), extinguishing powder and a sprayed water jet are deemed to be suitable extinguishing agents. Cool reservoirs at risk with a sprayed water jet (risk of bursting!).

If the protective caps on the filler valves are difficult to open, there is a risk of injury from leaking valve inserts (high pressure).

The filled refrigerant circuit of the A/C system is subject to gauge pressure. Before carrying out repairs on the A/C system, it is absolutely essential to draw off the refrigerant.

1. Before conducting repairs, check the actual pressure drop on the pressure gauge of the A/C service station.

R 134a must be drawn off, cleaned and returned to the A/C system using an A/C service station following the relevant operating instructions.

For a properly functioning A/C system, it is essential to have the greatest possible levels of cleanliness when working on the A/C system and the longest possible evacuation (at least 30 minutes dehumidification from refrigerant circuit) before each filling of the A/C system.

R 134a absorbs moisture very easily. Therefore, seal off opened pipes, condenser, evaporator, compressor and drier bottle immediately with plugs.

1. If an air conditioning system has been emptied completely because of a leak, accident or in the course of a repair, the «DESICCANT INSERT»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-53-517-removing-and-installingreplacing) and

COMPLETE CONDENSER must be replaced, since too much moisture may penetrate the inside

With replacement parts, the plugs may only be removed immediately before the lines are connected. In the event of warranty claims, the old parts must be provided with plugs to be able to determine the cause of the damage.

64 52... Instructions for opening and replacing parts in refrigerant circuit

I. Part replacement as preliminary work fur further repair work and part replacement based on gradual leakage

(minor leak, e.g. hairline crack)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-52-instructions-for-compressor-replacement) Evaporator: 10 ml Capacitor: 20 ml Desiccant insert/dryer flask: 20 ml Each replaced refrigerant line: 10 ml Capacitor with integrated dryer: 40 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

II. Part replacement due to sudden leak

(major leak, e.g. pipe break due to accident)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-instructions-for-handling-refrigerant) Evaporator: 35 ml Capacitor: 35 ml Desiccant insert/dryer flask: 55 ml Each replaced refrigerant line: 35 ml Capacitor with integrated dryer: 55 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

64 50... Leak detection with ultraviolet additives (UV additives) (BMW leak-testing case)

Note. Fill the hose system of the hand pump completely with UV additive PRIOR to use Use the UV additive exclusively for BMW-approved refrigerant fluids Do not operate the air conditioning system while the hand pump is connected or in use The air conditioning system must always be filled with an adequate amount of refrigerant to enable the leak-detecting agent to be properly distributed

Necessary preliminary work

Before actually testing for leaks, check the entire refrigerant circuit using the UV leak detection lamp to ensure that no UV additive is already in the area of the refrigerant circuit.

If already illuminated areas are found, carefully clean the area in question with the cleaning agent contained in the case.

On initial use

Connect hand pump (1) to additive cartridge (2) and hose piece (3).

Scheme 60

On initial use

Attach vent valve (1) to quick-release coupling (2).

Turn handle (3) on hand pump to advance the plunger until a small amount of UV additive emerges. This vents the hose system.

Scheme 61

Attach quick-release coupling (1) to low-pressure connection (2) of air conditioning system.

Turn handle on hand pump (3) until the required amount of UV additive is added.

The quantity of UV additive to be added is dependent on the AMOUNT OF REFRIGERANT IN THE REFRIGERANT CIRCUIT

1. Air conditioning systems with refrigerant filling up to 900 g: one graduation mark (4) on additive cartridge
2. Air conditioning systems with refrigerant filling in excess of 900 g: two graduation marks (4) on additive cartridge

Scheme 62

Note. After filling, remove quick-release coupling (1) and if necessary use the cleaning agent contained in the special tool case to clean up the UV additive.

Further tasks

1. Start engine
2. Run air conditioning system at highest setting for 5 - 10 minutes in order to ensure adequate distribution of dye in the system
3. Turn off engine.
4. Check all air conditioning system components for possible leaks
5. Possible leaks show up in luminous green

Complete accompanying information label (1) with the relevant data and attach in an easily visible position next to the filling capacity information label (2).

Scheme 63

Scheme 64

64 50... Safety instructions for handling refrigerant R134a

Protective measures/rules of conduct

1. Wear protective goggles
2. Wear oil-resistant protective gloves
3. Do not smoke!
4. Observe country-specific safety regulations.

First aid measures

1. Eye contact: In the event of contact with the eyes, rinse immediately with plenty of running water and consult an opthalmologist.
2. Skin contact: In the event of contact with skin, remove affected clothing immediately and rinse with plenty of water.
3. After inhalation: If refrigerant vapors are inhaled in greater concentrations, remove the person affected to an area of fresh air and keep them under supervision. Call for a doctor. If breathing problems are experienced, breathe additional oxygen. If the person affected is breathing with difficulty or has stopped breathing, incline the person's head at the neck and administer the kiss of life.

64 50... Safety instructions for handling refrigerant oil

1. Wear protective goggles
2. Wear oil-resistant protective gloves
3. Do not smoke!
4. Observe country-specific safety regulations.

1. If swallowed: Do NOT induce vomiting, unless expressly instructed to do so by medical personnel. Do not administer anything to an unconscious person through their mouth. Consult a doctor immediately if larger quantities of this substance are swallowed. Loosen tight-fitting items of clothing (e.g. collar, tie, belt or similar).
2. Eye contact: Remove contact lenses if worn. In the event of eye contact, rinse eyes for at least 15 minutes with plenty of water. It is essential to use WARM WATER. Consult a doctor.
3. Skin contact: In the event of skin contact, rinse immediately with plenty of water. Remove contaminated clothes and shoes. Wash affected clothes before wearing again. Clean shoes thoroughly before reusing. Call for a doctor.
4. After inhalation: If inhaled, take the person affected outside into fresh air immediately and keep them under supervision. Call for a doctor. If breathing difficulties are experienced, administer additional oxygen. If the person affected stops breathing, administer the kiss of life.

Recycling

Catch and dispose of emerging refrigerant oil.

Observe country-specific waste-disposal regulations.

Absorb escaping refrigerant oil with fluid-binding material.

Notify the relevant authorities if larger amounts of refrigerant oil are discharged into above-ground water supplies, drainage systems or subsoil.

(minor leak, e.g. hairline crack)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-52-instructions-for-compressor-replacement) Evaporator: 10 ml Capacitor: 20 ml Desiccant insert/dryer flask: 20 ml Each replaced refrigerant line: 10 ml Capacitor with integrated dryer: 40 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

(major leak, e.g. pipe break due to accident)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-instructions-for-handling-refrigerant) Evaporator: 35 ml Capacitor: 35 ml Desiccant insert/dryer flask: 55 ml Each replaced refrigerant line: 35 ml Capacitor with integrated dryer: 55 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

Scheme 65

64 51 591 Removing and installing/renewing evaporator

Necessary preliminary tasks

1. «REMOVE HEATING UNIT»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-11-205-removing-and-installingreplacing)

Release screw (1).

Tightening torque 64 53 3AZ .

Remove adapter plate (2).

Release screws (4).

Tightening torque 64 11 1AZ .

Remove bulkhead adapter (3).

Release screw (1).

Replacement

Release screws (2) on expansion valve (3).

Tightening torque 64 53 9AZ .

Remove expansion valve (3).

Installation

Replace sealing rings.

Use special tool 009310 Keil to mount sealing rings without damaging them.

Scheme 66

Release screws (1).

Unclip associated retaining lugs on lower housing section (2).

Remove lower housing section (2) and place to one side.

Scheme 67

Pull evaporator (1) in direction of arrow out of upper housing section (2).

Scheme 68

64 51 525 Removing and installing/replacing expansion valve (N52K)

Necessary preliminary tasks

1. «DRAIN OFF AIR CONDITIONING SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

Lever out expansion rivets (1).

Unclip cable holder (2) on tension struts (3) towards top.

Scheme 69

Release screw (1) on bulkhead (2).

Pull holder (3) out of rubber.

Note. Depiction may vary, depending on engine variant.

Release screws (1).

Tightening torque 64 53 2AZ .

Detach refrigerant lines (2) in direction of arrow and press slightly to one side.

Installation

Replace sealing rings.

Use special tool 00 9 030 Keil to mount sealing rings without damaging them.

Scheme 70

Release screw (1).

Detach adapter plate (2) in direction of arrow.

Installation

Tightening torque 64 53 3AZ .

Make sure bulkhead grommet (3) is correctly seated in all-round groove of adapter plate (2).

Scheme 71

Release screws (1).

Installation

Tightening torque 64 53 4AZ .

Carefully detach bulkhead grommet (2) from bulkhead and fold down in direction of arrow.

Scheme 72

Detach expansion valve (1) in direction of arrow.

Installation

Replace sealing rings.

Use special tool 00 9 030 Keil to mount sealing rings without damaging them.

Unclip frame (2) from bulkhead and insert in groove (3) of bulkhead grommet (4).

Make sure bulkhead grommet (4) is correctly seated.

Scheme 73

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

64 51 525 Removing and installing/replacing expansion valve (N54)

Necessary preliminary tasks

1. «DRAIN OFF AIR CONDITIONING SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

Lever out expansion rivets (1).

Unclip cable holder (2) on tension struts (3) towards top.

Release screws (1). Tightening torque, see 64 53 2AZ in 64 53 REFRIGERANT LINES AND EXPANSION VALVE . Detach refrigerant lines (2) and press slightly to one side. Installation: Replace sealing rings. Use special tool 00 9 030 to mount sealing rings without damaging them.

Scheme 74

Release screw (1). Detach adapter plate (2) in direction of arrow. Installation: Tightening torque, see 64 53 3AZ in 64 53 REFRIGERANT LINES AND EXPANSION VALVE . Make sure bulkhead grommet (3) is correctly seated in all-round groove of adapter plate (2).

Scheme 75

Release screws (1). Installation: Tightening torque, see 64 53 4AZ in 64 53 REFRIGERANT LINES AND EXPANSION VALVE . Carefully detach bulkhead grommet (2) from bulkhead and fold down in direction of arrow.

Scheme 76

Detach expansion valve (1) in direction of arrow. Installation: Replace sealing rings. Use special tool 00 9 030 to mount sealing rings without damaging them. Unclip frame (2) from bulkhead and insert in groove (3) of bulkhead grommet (4). Make sure bulkhead grommet (4) is correctly seated.

Scheme 77

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

64 52... Instructions for compressor replacement

When evacuating the air-conditioning system, refrigerant oil is also extracted and collected in the oil separator of the A/C service station.

After evacuation, the refrigerant must be filtered in the A/C service station as the oil separator could still contain a liquid refrigerant/oil mixture. The filtering process gasifies the refrigerant completely and only the previously bound refrigerant oil remains in the oil separator. Measure and note down this quantity of refrigerant oil.

1. «REFER TO DRAWING OFF A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

Scheme 78

Transfer the refrigerant oil remaining in the previous compressor via the filler plug completely into a measuring container.

Scheme 79

Measure the amount of refrigerant oil collected from the previous compressor.

Scheme 80

The new compressor is filled at the factory with refrigerant oil. Open filler plug and pour entire contents of compressor into a clean container.

Installation

Replace sealing ring and moisten with refrigerant oil.

Tightening torque 64 52 2AZ .

Scheme 81

From the new compressor, pour the same amount of refrigerant oil (as drained from the previous compressor) + 10 g extra into a clean measuring container and pour again into the new compressor.

Remaining refrigerant oil can be poured into service station tank.

1. «REFER TO EVACUATING A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) .

Otherwise the excess refrigerant oil must be disposed of correctly.

On account of its hygroscopic properties, refrigerant oil must not be stored in open containers.

Scheme 82

The refrigerant oil drawn off from the oil separator of the A/C service station and from the previous compressor must not be reused and must be correctly disposed of.

Observe country-specific waste-disposal regulations.

Scheme 83

After installing the new compressor, it is essential before filling the A/C system to pour the same amount of the previously drawn off refrigerant oil into the system again

1. «REFER TO FILLING A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

Scheme 84

Installation

If A/C system is opened for more than 24 hours

1. Replace «DESICCANT INSERT»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-53-517-removing-and-installingreplacing)
2. or «CONDENSER»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-53-551-removing-and-installing)

(minor leak, e.g. hairline crack)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-52-instructions-for-compressor-replacement) Evaporator: 10 ml Capacitor: 20 ml Desiccant insert/dryer flask: 20 ml Each replaced refrigerant line: 10 ml Capacitor with integrated dryer: 40 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

(major leak, e.g. pipe break due to accident)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-instructions-for-handling-refrigerant) Evaporator: 35 ml Capacitor: 35 ml Desiccant insert/dryer flask: 55 ml Each replaced refrigerant line: 35 ml Capacitor with integrated dryer: 55 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

Scheme 85

64 52 521 Replacing A/C system compressor (N52k)

Follow safety instructions for handling refrigerant See 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A or 6450... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R134A .

Follow safety instructions for handling REFRIGERANT OIL .

Avoid contact with refrigerant and refrigerant oil.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminum screws/bolts exclusively.

Aluminum screws/bolts must be replaced each time they are released.

The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage) !

Necessary preliminary tasks

1. «DRAWING OFF, EVACUATING AND FILLING THE A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) are not included in the time value given for this work operation
2. Release expansion tank and place to one side
3. Remove alternator «DRIVE BELT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-010-replacing-alternator-drive)
4. Remove «COOLANT THERMOSTAT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-53-000-removing-and-installingreplacing)

Release screws (1).

Tightening torque 64 52 1AZ .

Remove suction line (2) and pressure line (3).

Installation

Replace sealing rings.

Use special tool 00 9 030 Keil to mount sealing rings without damaging them.

Disconnect associated plug connection on compressor

Scheme 86

Note. Secure compressor (3) against falling out.

Release screw (1).

Unfasten screws (2).

Tightening torque 64 52 2AZ .

Remove compressor towards front.

Scheme 87

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)
2. Fill cooling system . See «1700039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-039-venting-and-filling) or «1700009 CHECKING COOLING SYSTEM FOR LEAKS (N54, N52K)»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-009-checking-cooling-system) , vent and check for leaks.

64 52 521 Replacing air conditioning compressor (N54)

Follow safety instructions for handling refrigerant See 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A or 6450... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R134A .

Follow safety instructions for handling REFRIGERANT OIL .

Avoid contact with refrigerant and refrigerant oil.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminum screws/bolts exclusively.

Aluminum screws/bolts must be replaced each time they are released.

The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage) !

Necessary preliminary tasks

1. «DRAWING OFF, EVACUATING AND FILLING THE A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) are not included in the time value given for this work operation.
2. Remove air conditioning compressor drive belt. See «11 28 010 REPLACING DRIVE BELT FOR ALTERNATOR (N54, N54T)»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n54__11-28-010-replacing-drive-belt) .
3. Remove suction filter housing. See «13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N54)»(/bmw/z4/e89-2009-2013/remont/fuel-system/#fuel-system-repair-n54__13-71-000-removing-and-installingreplacing) .
4. Remove left charge-air duct. See «11 61 365 REMOVING AND INSTALLING/REPLACING LEFT CHARGE AIR DUCT (N54, N54T)»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n54__11-61-365-removing-and-installingreplacing) .

Release screws (1) and remove refrigerant lines. Tightening torque, see 64 52 1AZ in 64 52 A/C COMPRESSOR . Installation: Replace sealing rings. Use special tool 00 9 030 to mount sealing rings without damaging them. Unfasten plug connection (2) and disconnect.

Scheme 88

Release screw (1). Tightening torque, see 64 52 2AZ in 64 52 A/C COMPRESSOR .

Scheme 89

Release screw (1). Tightening torque, see 64 52 2AZ in 64 52 A/C COMPRESSOR .

Scheme 90

Note. Secure compressor (2) against falling off/down

Release bolt (1) and lift out compressor (2). Tightening torque, see 64 52 2AZ in 64 52 A/C COMPRESSOR .

Scheme 91

Installation: Adapter sleeves (1) must not be damaged. Replace damaged adapter sleeves.

Scheme 92

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

(minor leak, e.g. hairline crack)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-52-instructions-for-compressor-replacement) Evaporator: 10 ml Capacitor: 20 ml Desiccant insert/dryer flask: 20 ml Each replaced refrigerant line: 10 ml Capacitor with integrated dryer: 40 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

(major leak, e.g. pipe break due to accident)

Procedure

1. «DRAW OFF»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system, then determine drawn-off refrigerant oil quantity
2. Carry out part replacement
3. Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced: Compressor: refer to «NOTES ON REPLACING COMPRESSOR»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-instructions-for-handling-refrigerant) Evaporator: 35 ml Capacitor: 35 ml Desiccant insert/dryer flask: 55 ml Each replaced refrigerant line: 35 ml Capacitor with integrated dryer: 55 ml Safety pressure switch and seals: no additional refrigerant fluid
4. «EVACUATE AND FILL»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) A/C system

Scheme 93

1. Heater/air conditioner with add-on parts
2. Remove fan for heater - A/C system
3. Compressor for A/C system
4. Fan for heater - A/C system
5. Desiccant bottle for A/C system
6. Expansion valve

64 53...Instructions for replacement of air conditioning capacitors and radiator/coolers

Important! Even when they are correctly installed or due to normal driving, coolers (oil cooler, radiator, charge air cooler) or air conditioning capacitors may show slight impressions or deformations on their discs (picture). This is not damage. Radiators, cooler or capacitors are not to be replaced in this case.

Note. The deformations shown in can be bent back with a standard fin comb.

Damage to lines carrying media or on the flat pipe require replacement of the radiator/ or air conditioning condenser (picture 2-6).

Scheme 94

64 53 551 Removing and installing or replacing capacitor for heating and air conditioning system

The repair work described is identical to

Remove right MODULE CARRIER .

64 53 517 Removing and installing/replacing desiccant insert for heating and air conditioning system

Note. Follow notes for opening and replacing parts in refrigerant circuit. If air conditioning system is opened for more than 24 hours: Replace desiccant insert for heating and air conditioning system.

Necessary preliminary work

1. «DRAIN OFF AIR CONDITIONING SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)
2. Remove «CROSS CONNECTION UPPER PART»(ref-381258-S12487345552010122800000)

Release screws (1).

Tightening torque 17 10 2AZ .

Scheme 95

Carefully pull capacitor (1) with dryer flask (2) forward out of left module carrier (3).

For further operation, protect cooling fins between capacitor and radiator, for example with a cloth (2).

Cloth (2) simultaneously serves as a fixture.

If necessary, pierce label on dryer flask.

Scheme 96

Note. For purpose of clarity capacitor shown removed in following work steps.

Remove protective cap (1) from capacitor for the heating and air conditioning system (2).

Scheme 97

Press sealing cap (1) inwards and remove circlip (2).

Scheme 98

Remove the sealing cap (2) from capacitor of the heating and air conditioning system (3) with an inserted screw (1).

Scheme 99

Installation note

Renew sealing rings (1) of sealing cap (2).

Use special tool 00 9 030 Keil to install sealing rings without damaging them.

Scheme 100

Remove desiccant insert for heating and air conditioning system (1) in direction of arrow from capacitor of the heating and air conditioning system (2).

Scheme 101

Note. If the heating and air conditioning system remains open for longer than one hour, the refrigerant lines must be sealed off with seal plugs. In event of warranty application, seal pipe aperture with seal plugs of new dryer flask.

After installation

1. «EVACUATE AND FILL HEATING AND AIR CONDITIONING SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

64 53 521 Replacing safety pressure switch

Necessary preliminary tasks

1. «DRAWING OFF, EVACUATING AND FILLING THE A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating) are not included in the time value given for this work operation

Disconnect plug connection (1).

Release safety pressure switch (2).

Installation

Tightening torque 64 53 14AZ .

Replace sealing ring.

Scheme 102

After installation

1. «EVACUATE AND FILL A/C SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

See also:
• INSTRUCTIONS FOR WORKING ON COOLING SYSTEM
• 64 53 2AZ
• 1700039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT
• 1700009 CHECKING COOLING SYSTEM FOR LEAKS (N54, N52K)
• 64 53 REFRIGERANT LINES AND EXPANSION VALVE
• SPECIFIED FILL QUANTITY
• DRIVE BELT
• COOLANT THERMOSTAT
• 11 28 010 REPLACING DRIVE BELT FOR ALTERNATOR (N54, N54T)
• 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N54)
• 11 61 365 REMOVING AND INSTALLING/REPLACING LEFT CHARGE AIR DUCT (N54, N54T)
• 64 52 A/C COMPRESSOR
• MODULE CARRIER
• 17 10 2AZ
• HEATER/AIR CONDITIONER FAN
• 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A
• 6450... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R134A
• INSTRUCTIONS
• DESICCANT INSERT FOR A/C SYSTEM
• DRAW OFF REFRIGERANT FROM A/C SYSTEM
• CENTRE FRESH AIR GRILLE
• EVAPORATOR
• REMOVE HEATER
• COMPLY
• COMPLETE CONDENSER
• NOTES ON REPLACING COMPRESSOR