Restraints - Repair - e92/93 BMW M3 E90

72 Safety precautions and general information

Safety instructions

1. «Safety regulations»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-00-safety-regulations-for) for handling airbag modules, airbag components and pyrotechnical seat belt tensioners
2. «Notes on scrapping»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-notes-on-scrapping) vehicles with gas generators
3. «Deactivation/activation pyrotechnical components»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-deactivating-front-passenger)

Handling electrical and electronic equipment

1. «Unlocking/locking airbag plug connections»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-unlockinglocking-airbag-plug)
2. Repairing airbag leads . See «61 00 ... REPAIRING AIRBAG CABLES»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e9293__61-00-repairing-airbag-cables) .
3. Handling optical fibres . See «61 00 ... NOTES ON HANDLING OPTICAL FIBERS»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e9293__61-00-notes-on-handling) .

Check

1. «Check seat belt»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-checking-automatic-safety)
2. «Checklist for seat belt»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-inspection-list-for)

Airbag system

1. Functional description and checking, refer to DIS (BMW diagnostic system)
2. «Deactivating airbags»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-deactivating-front-passenger)
3. «Procedure after airbag triggering»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-procedure-after-airbag) .

72 00 ... Safety regulations for handling components with gas generators

It is essential to comply with the regulations as specified in the law relating to the use of explosives when working on airbag units and seat belt tensioners.

Airbags, seat belt tensioners etc. are pyrotechnical objects. Pyrotechnical objects are assigned to different danger classes on the basis of the quantity of propellant that they contain. The assignment can be ascertained from the identification marking on the product

This applies in particular to the following components

1. Airbag modules (driver's/front passenger airbags, side airbags)
2. Buckle/belt tensioner
3. Head airbag (ITS, AHPS)
4. Active knee protection
5. Active head restraint
6. Safety battery terminal (SBK)

1. Regulations The regulations quoted in the following refer to the Federal Republic of Germany. In all other countries, the relevant legislation and regulations must be observed in each case. Country-specific legal regulations that go beyond this information or court decisions based thereon must be followed in each case or given precedence over these regulations. The following components used by BMW: Pyrotechnical restraint systems are subject to danger class PT1 Gas generators are pyrotechnical objects belonging to danger class T1. Handling, transporting and storing non-fired gas generators are subject to the "Explosive Materials Act" (law relating to the use of explosives dated 13/09/1976). The relevant trade supervisory authority must be notified at least 2 weeks before pyrotechnical objects are handled for the first time. Here the relevant authority must be notified in writing of the person responsible (e.g. dealership owner, holder of general power of attorney or if necessary workshop supervisor). A certificate of qualification, i.e. specific training, is not required for the person responsible.
2. Disassembly and assembly Inspection, testing and installation work may only be carried out by expert trained personnel in BMW Service. Work on components of the airbag system should only ever be carried out with the battery disconnected, the negative terminal post covered and the plug connection of the cable leading to the gas generator disconnected. If only the battery is disconnected, the following prescribed waiting period must be observed without fail: 30 minutes for vehicles up to 9/93; 1 minute for vehicles from 9/93 In the event of breaks in work, a component with a gas generator that has been removed must be secured against access by other persons. Individual components must never be repaired. Instead, always replace them. Do not treat airbag system components with cleaning agents or grease. Components of the airbag system must not be exposed to temperatures in excess of 75°C. Airbag system components, including electronic diagnostic components, which have been dropped from heights in excess of 0.5 m must not be reinstalled in the vehicles. Before installing, subject airbag system components (including electronic diagnostic components) to a visual inspection for damage and replace if necessary. Airbag system components may only be electrically tested while they are installed and only with the BMW diagnostic system / DIS. Danger of injury: The airbag module may only be set down with the airbag itself facing upwards. Otherwise the generator will be thrown upwards if it is fired. Do not point the firing pellet of a gas generator at other persons. Components with gas generators must not be fired while they are removed. They must be disposed of by special disposal companies or returned to BMW in the packaging of the new components. When carrying out straightening and welding work with an electric welder: Disconnect battery Cover negative terminal (post) Avoid all contact with the skin when removing a fired airbag module - wear gloves. Wash with water after contact with the skin.
3. Transport Components with gas generators must be sent off in the packaging of the new components.
4. Storage Observe the regulations of the relevant trade supervisory authority and the applicable national regulations.

Scheme 1

72 11 ... Checking automatic safety belt

General considerations when checking seat belts

The seat belts must be checked after an accident.

For the check, you should start by trying to get information on which seats in the car involved in the accident were occupied. If this is not possible, check all the seat belts in the car and replace them if necessary.

In the event of deformations on the car, you must subject the components of the restraint system affected in this area such as e.g.

1. Seat belt
2. Anchor fitting tensioner
3. Seatbelt height adjustment
4. Belt buckle tensioner
5. Triggering sensors
6. etc.

to a function check and a visual inspection.

If you are in any doubt as to the unimpaired functional capability of restraint system components, these components must be replaced in the interests of safety!

If a seat belt has to be replaced following an accident (e.g. in the event of a frontal and/or side impact with permanently deformed impact dampers/deformation elements or cross-members), the complete seat belt must be replaced! The complete seat belt comprises

1. Top belt
2. Lower strap
3. Anchor fitting tensioner
4. Seat belt buckle (buckle tensioner)
5. Seatbelt height adjustment
6. Retaining screws of all components

The following must also be checked and if necessary replaced

1. Seatbelt mountings on the car body
2. Seatbelt mountings on the seat
3. Seat runners
4. Seat structure (frame, etc.)

Alignment tests on the seat and the seat runners are not permitted!

The following explanations and the checklist for the automatic safety belt can provide help.

An unusable seat belt or a seat belt worn in a serious accident should be destroyed immediately after removal to guarantee that it cannot be used again.

Checking automatic reel and seatbelt strap

The automatic reel has two independent activation systems for seat-belt locking.

The first activation system locks the automatic reel when driving quickly around curves, driving in tight curves, on extreme inclinations (vehicle rolls over) and during sharp braking or impact.

To check, the seat backrest must be placed in the upright position and both hands held in a supporting position close to the steering wheel. The brakes are then applied fully while driving on a dry surface and at a road speed equal to twice that of walking speed.

The seat belt must lock.

The second activation system provides additional safety and is controlled by inertia mass.

If the reel locks when the strap is pulled out suddenly, this system is also OK.

Automatic reel does not require servicing and must not be opened.

Precondition for complete, problem-free retraction of straps

1. the straps must not be twisted!
2. the straps must not be damaged!

When placed to one side, the straps of the front seats must retract fully.

With the straps in the rear seat bench, a small remaining loop is acceptable due to increased friction between the strap and the rear seat bench cover if

1. this remaining loop is fully retracted when the strap is reguided.

Belt straps should only be cleaned with a luke-warm soap solution or a commercial laundry detergent.

Belt straps must never be cleaned chemically or dyed.

The automatic reel and strap must be replaced in the event of

1. creases
2. unraveling
3. pinches
4. cracks and tears
5. traces of melting
6. traces of wear on casing of seat belt tongue or on reversing clip.

Checking lower strap (belt buckle tensioner)

To fasten a seat belt, the tongue should insert easily and with a loud click in the lock.

When the "Red button" is pressed, the tongue must be ejected from the lock under spring pressure.

If the lock cover is missing or damaged, the lower strap must be replaced.

Replace the triggered belt buckle tensioner including the complete seat belt with seatbelt height adjustment and retaining screws and check the

1. Seatbelt mountings on the car body
2. seatbelt mountings on the seat
3. seat runners.
4. Seat structure.

Criteria for a triggered mechanical belt buckle tensioner

1. very low position of seatbelt buckle (comparisons with new part).

Criteria for a triggered pyrotechnical belt buckle tensioner

1. very low position of seatbelt buckle (comparisons with new part).
2. Airbag warning lamp permanently lit: read out airbag system fault memory.

The belt buckle tensioners can be triggered under certain circumstances even when the seat is not occupied. If it is definite that the belt system was not used (seat was not occupied), there is no need to replace the

1. upper strap
2. attachment parts (belt height adjustment, screws)
3. seatbelt mountings on the car body
4. seatbelt mountings on the seat
5. seat runners.

after a check.

Checking anchor fitting tensioner

Replace the triggered anchor fitting tensioner including the complete seat belt with seatbelt height adjustment, lower strap and retaining screws and check the

1. Seatbelt mountings on the car body
2. Seatbelt mountings on the seat
3. Seat runners
4. Seat structure

Criteria for a triggered anchor fitting tensioner

1. A triggered anchor fitting tensioner can be recognized from the wrapped belt strap around the shaft.
2. Airbag warning lamp permanently lit: read out airbag system fault memory.

72 11 ... Inspection list for automatic seat belt

AUTOMATIC SEAT BELT SPECIFICATION

72 11 030 Removing and installing or replacing front seat belt (Convertible)

Necessary preliminary tasks

1. Remove front seat. See «SEATS - REPAIR (CONVERTIBLE/COUPE)»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293) .
2. Remove and install rear panel on front seat. See «SEATS - REPAIR (CONVERTIBLE/COUPE)»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293) .
3. Remove trim cover for outer fitting. See «52 14 ... REMOVING AND INSTALLING OR REPLACING TRIM COVER FOR OUTER FITTING ON FRONT SEAT»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing) .
4. Remove inner cover on front seat. See «52 14 041 REMOVING AND INSTALLING OR REPLACING INNER COVER ON LEFT OR RIGHT FRONT SEAT»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-041-removing-and-installing) .
5. Partially detach seat cover. See «52 14 400 REPLACING COVER FOR LEFT OR RIGHT FRONT SEAT»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-400-replacing-cover-for) .
6. Partially detach backrest cover. See «52 14 405 REPLACING BACKREST COVER FOR LEFT OR RIGHT FRONT SEAT»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-405-replacing-backrest-cover) .

Removing inertia reel with flex shaft and coupling gear: Release screw. Installation: Replace microencapsulated screw. Tightening torque 72 11 02 AZ, see 72 11 SEAT BELTS . Remove end fitting.

Scheme 2

Installation: Plastic washer on end fitting must be fitted! End fitting is coded to prevent incorrect installation.

Scheme 3

Unclip all cables from guides. Release screw (1). Tightening torque: 72 11 09AZ, see 72 11 SEAT BELTS . Release stud (2). Tightening torque: 72 11 08AZ, see 72 11 SEAT BELTS .

Scheme 4

Note: Replace driver (1) after removal with a new component as damage cannot be excluded. When removing driver (1), ensure guide (3) and lever (2) of coupling gear are not damaged. Remove driver (1) from backrest shaft.

Scheme 5

Installation: Do not fit new driver (1) on backrest shaft yet. Backrest must be in as vertical a position as possible. Driver (1) and lug are positioned at an angle towards top in direction of travel (arrow).

Scheme 6

Installation: Feed driver (1) into slot (3) in lever (2) of coupling gear. Align lever (2) on coupling gear so that slot (3) is correctly positioned with respect to driver (1).

Scheme 7

Installation: Pin on coupling gear must reach into hole in seat.

Scheme 8

Installation: Make sure groove and pin are correctly positioned. Clip flexible shaft (1) into place with coupling gear (2). Ensure complete engagement by pulling gently on flex shaft. Flexible shaft must not clip out here!

Scheme 9

Unclip flexible shaft (3) from cable tie (2). Unclip cable tie (1) from backrest.

Scheme 10

Release nut and remove inertia reel with flexible shaft and coupling gear. Replace nut. Tightening torque 72 11 01AZ, see 72 11 SEAT BELTS . Installation: Inertia reel is coded to prevent incorrect installation.

Scheme 11

Remove belt guide - build date (version) up to 09/08: Unclip cover (1) with plastic wedge.

Scheme 12

Release screw (1). Tightening torque 72 11 03AZ, see 72 11 SEAT BELTS . Remove seat belt guide.

Scheme 13

Remove belt guide - build date (version) from 09/08

Note. Protect belt guide against damage (scratches). Trims of belt guide at front and rear (1) are destroyed when removed!

Scheme 14

Installation: Pay particular attention to cutting line between both trims. If the trims are not fully clipped into place, this will result in grinding noises when the belt is pulled.

Release screw on belt guide. Tightening torque 72 11 03AZ, see 72 11 SEAT BELTS .

Scheme 15

Release further screw on belt guide and detach belt guide. Remove complete seat belt with belt guide, inertia reel with flex shaft and coupling gear. Do not kink flex shaft and do not transport inertia reel by flex shaft.

Scheme 16

72 11 033 Removing and installing or replacing front seat belt (Coupe)

Necessary preliminary tasks

1. Remove panel for door post «51 43 148 REMOVING AND INSTALLING OR REPLACING TRIM ON LEFT OR RIGHT DOOR PILLAR (TOP)»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-43-148-removing-and-installing)

Note. If a seat belt which is damaged due to an accident is exchanged, check the slide bar for damage (bending) and replace if necessary.

Lever out cap (1). Release screw (2). Tightening torque 72 11 05AZ, see 72 11 SEAT BELTS . Installation: Check that spacer bushing (3) and rubber ring (4) are in correct position.

Scheme 17

Release screws (1). Tightening torque 72 11 04AZ, see 72 11 SEAT BELTS . Installation: E81 only: If screws (1) slip, use 6 mm dia. repair screws. Tightening torque 72 11 04AZ, see 72 11 SEAT BELTS . Remove deflection bracket (2). Release screw (3). Tightening torque 72 11 03AZ, see 72 11 SEAT BELTS . Remove belt deflection fitting (4).

Scheme 18

Release screw (1). Tightening torque 72 11 01AZ, see 72 11 SEAT BELTS . Remove automatic reel (2). Installation: Coding (3) of automatic reel must be seated in body opening.

72 11 033 Removing and installing/replacing front left or right seat belt (Sedan)

Necessary preliminary tasks

1. Remove panel for door post . See «51 43 148 REMOVING AND INSTALLING OR REPLACING TRIM ON LEFT OR RIGHT DOOR PILLAR (TOP)»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-43-148-removing-and-installing) or «51 43 150 REMOVING AND INSTALLING OR REPLACING TRIM FOR LEFT OR RIGHT DOOR PILLAR (BOTTOM)»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-43-150-removing-and-installing) .

Move backrest to full rearward position.

Unclip release tab (2) for belt anchor fitting trim (1) with plastic wedge.

Scheme 19

Release screw (1).

Tightening torque: 72 11 2AZ , see 72 11 SEAT BELTS .

Remove anchor fitting (2).

Installation

Make sure anchor fitting is correctly seated on seat mechanism pin.

Scheme 20

Release screws (1).

Tightening torque: 72 11 4AZ , see 72 11 SEAT BELTS .

Remove deflector bar (2).

Release screw (3).

Tightening torque: 72 11 3AZ , see 72 11 SEAT BELTS .

Set down belt deflector with belt (4).

Scheme 21

Release screw (1).

Tightening torque: 72 11 1AZ , see 72 11 SEAT BELTS .

Remove automatic reel (3).

Installation

Coding (2) of automatic reel must be seated in body opening.

Scheme 22

72 11 041 Removing and installing or replacing front left or right lower belt fitting (seat belt pretensioner)

Necessary preliminary tasks

1. Remove front seat . See «SEATS - REPAIR (CONVERTIBLE/COUPE)»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293) or «SEATS - REPAIR (SEDAN)»(ref-351051) .

Switch off ignition!

Installation

1. Microencapsulated screws (Loctite) must be replaced and may not be reused
2. Screw connection must be completed within 20 minutes (start of curing)
3. Microencapsulated screws must not be retightened
4. Clean thread of nut beforehand in event of repeated use

Unfasten plug connection (1) and disconnect.

Unlock plug connection (3) and pull all plugs out of plug housing (2).

Disconnect all cable ties.

Removing wiring harness.

Installation

1. Replace cable tie.
2. Wires must not be under tension
3. Plugs are coded and must be reinstalled in the correct sequence in the plug housing

Scheme 23

Only in event of replacement for E87 with build date before 09/2004

New seat belt tensioners are supplied with seat belt buckle contacts which are not required before this build date.

1. Disconnect contacts at pin 14 and pin 15
2. Tie both contacts to rear

Note. Clear all fault memories and code car again.

Scheme 24

Release screw (1).

Tightening torque: 72 11 6AZ , see 72 11 SEAT BELTS .

Remove belt pretensioner (3).

Installation

Replace screw (1).

Belt tensioner (3) is secured through recess (2) to retaining bracket.

Scheme 25

72 11 080 Removing and installing/replacing left or right seat-belt extender hand (Coupe)

Necessary preliminary tasks

1. Extend seat-belt extender
2. Disconnect battery to prevent seat-belt extender from moving back

Firmly pull seat-belt extender hand (1) in direction of arrow to unclip retaining lug (2) from seat-belt extender.

Scheme 26

Note. Removal tool for seat-belt extender hand is included in delivery specification.

Insert tool to bridge loss prevention element (1). Pull seat-belt extender hand out of seat-belt extender.

Scheme 27

72 11 092 Removing and installing/replacing rear left or right seat belts

Necessary preliminary tasks

1. Remove rear window shelf . See «51 46 001 REMOVING AND INSTALLING PANEL FOR REAR WINDOW SHELF (PARCEL SHELF)»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-46-001-removing-and-installing) .
2. Remove rear seat . See «52 24 005 REMOVING AND INSTALLING OR REPLACING REAR SEAT»(ref-351051-S22284483262009121800000) .

Removing left or right inertia reel unit

Release screw (1) on inertia reel unit (2).

Tightening torque 72 11 20AZ , see 72 11 SEAT BELTS .

Remove inertia reel unit (2).

Scheme 28

Installation

Pay attention to coding.

Push inertia reel unit (1) onto body lug (2).

Scheme 29

Release screw (2).

Tightening torques 72 11 22AZ , see 72 11 SEAT BELTS .

Remove seat belt (1).

Installation

Pin (3) determines the installation position and prevents the anchor fitting from turning.

Scheme 30

72 11 096 Removing and installing or replacing rear left or right lower belt fitting

Necessary preliminary tasks

1. Remove rear seat. See «52 24 005 REMOVING AND INSTALLING OR REPLACING REAR SEAT»(ref-351051-S22284483262009121800000) .

Illustration show removal of the left lower belt fitting; proceed in the same way for the right fitting. Release screw (1). Tightening torque 72 11 23AZ, see 72 11 SEAT BELTS . Remove lower belt fitting (2). Installation: Pin (3) determines the installation position and prevents lower belt (2) from turning.

Scheme 31

72 11 098 Removing and installing/replacing all rear lower belt fittings

Necessary preliminary tasks

1. Remove rear seat . See «52 24 005 REMOVING AND INSTALLING OR REPLACING REAR SEAT»(ref-351051-S22284483262009121800000) .

Illustration shows removal of the left lower belt fitting; proceed in the same way for the right fitting.

Release screw (1).

Tightening torque 72 11 23AZ , see 72 11 SEAT BELTS .

Remove lower belt fitting (2).

Installation

Pin (3) determines the installation position and prevents the lower belt fitting (2) from turning.

Note. Middle lower belt fitting (4) can only be removed in conjunction with right lower belt fitting.

Scheme 32

Lower belt fitting with belt tensioner

Illustration show removal of the left lower belt fitting; proceed in the same way for the right fitting.

Unfasten plug connection (2) and disconnect.

Release screw (1).

Tightening torque 72 11 23AZ , see 72 11 SEAT BELTS .

Remove lower belt fitting (3).

Installation

Pin (4) determines the installation position and prevents the lower belt fitting (3) from turning.

Scheme 33

Note. Middle lower belt fitting (5) can only be removed in conjunction with right lower belt fitting.

72 11 101 Removing and installing/replacing rear center seat belt

Necessary preliminary tasks

1. Remove rear seat . See «52 24 005 REMOVING AND INSTALLING OR REPLACING REAR SEAT»(ref-351051-S22284483262009121800000) .
2. Remove rear window shelf . See «51 46 001 REMOVING AND INSTALLING PANEL FOR REAR WINDOW SHELF (PARCEL SHELF)»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-46-001-removing-and-installing) .

Unscrew nut (1).

Tightening torque 72 11 20AZ , see 72 11 SEAT BELTS .

Remove inertia reel unit (2).

Installation

Pay attention to coding.

Scheme 34

Release screw (2) on middle seat belt anchor fitting.

Tightening torque 72 11 22AZ , see 72 11 SEAT BELTS .

Installation

Pin (3) determines the installation position and prevents the anchor fitting (1) from turning.

Scheme 35

Scheme 36

61 00 ... Repairing airbag cables

See 61 00 ... REPAIRING AIRBAG CABLES .

72 12 ... Deactivating front passenger airbags with key-operated switch

The passenger airbag can only be deactivated in accordance with the following instructions if the vehicle is equipped with a suitable key-operated switch!

The key-operated switch can be retrofitted if it is missing and has been ordered as an optional extra.

Key-operated switch

1. Optional extra SA 5DA for MINI
2. Optional extra SA 470 for BMW

The airbags can only be deactivated/reactivated while the vehicle is stationary and with the door open.

Scheme 37

Deactivation

1. Turn key-operated switch with ignition key to "OFF" position. Deactivatable airbags on passenger side out of operation. Head airbag on passenger side remains active. All airbags on driver side remain active.

Activation

1. 2 Turn key-operated switch with ignition key to "ON" position. All the airbags in the vehicle are activated and are triggered in appropriate situations.

Scheme 38

Warning lamp

When the ignition key is turned in the ignition lock, the function of the airbag system is checked and the warning lamp in the center console lights up for several seconds.

1. The warning lamp is permanently lit when the passenger airbags are deactivated
2. The warning lamp goes out after a few seconds when the passenger airbags are activated

Scheme 39

72 12 ... Notes on scrapping vehicles with gas generators (airbag system)

The gas generator is a pyrotechnical component and is for the most part permanently mounted on the following components

1. Airbag module Driver's/passenger airbag Side airbag Head airbag (e.g. AHPS2) Knee airbag
2. Belt tensioner
3. Belt buckle tensioner
4. Safety battery terminal
5. Active head restraint

In accordance with accident prevention regulations and specific national regulations, gas generators must be rendered unusable before they are scrapped. This is necessary because pyrotechnical objects can cause injury if improperly activated (e.g. scrapping with flame cutters).

With vehicles which are scheduled for scrapping, it is always essential prior to draining and further stripping work to ensure that all the gas generators in the vehicle are fired. The fired gas generators can then be scrapped together with the vehicle.

Gas generators that have not fired constitute a hazard (also to the environment)!

Firing failure

If correct firing is not possible, the relevant components must be removed and disposed of by special waste disposal companies!

Comply with safety regulations for handling airbag system components.

If a firing operation has failed

1. Disconnect the firing device from the battery and
2. Only approach the vehicle after a few minutes have elapsed

The components of an airbag system must always be disposed of. Such components must not be sold on as used parts.

Firing

Firing of the gas generators may only be carried out by expert personnel and under the supervision of a responsible person. Other standard accident prevention regulations (safety goggles, ear defenders etc.) must also be observed.

The gas generators must be fired from the outside in this vehicle which has been earmarked for scrapping. In this process

1. the doors must be closed
2. the rear lid must be open
3. the side windows must be open and
4. the sunroof must be open

To fire the gas generators, use the firing device with the appropriate cables (follow instructions).

Scheme 40

72 12 ... Procedure after airbag triggering as result of an accident

Check and/or replace following components after airbag triggering

Satellites (control unit + sensor)

1. Components Satellite, A-/B-pillar, left/right Satellite, front door Satellite, rear seat Satellite, driver's/front passenger seat Satellite, vehicle center
2. Procedure Read out fault memory Clamp off battery and observe waiting period Rectify faults Reconnect battery and observe waiting period Clear fault memory Turn off ignition and wait at least 2 minutes (no consumers may be switched on during this period such as e.g. inside lights, radio, etc.) Switch ignition on Clear fault memory and if necessary rectify faults

Cables and plugs

1. Components and procedure Check cables and plugs for damage, replace if necessary.

Belt system

1. Components Retractor mechanism Belt buckle tensioner Seatbelt height adjustment
2. Procedure Check components, replace if necessary

Seats

1. Components Seat Airbag module Active head restraint
2. Procedure Check seats (function check of seat mechanism), replace if necessary Check seat screw/bolt connections Replace gas generator, active head restraint system If the severity of the impact has not caused any other damage to the seat, only the triggered gas generator needs to be replaced. External feature: The triggered head restraint is folded forwards and engaged. The repair work can be carried out in the car with the rear panel removed. The entire system can be pushed back into its original position and the new gas generator installed. The gas generator can be replaced up to 5 times. Replace airbag module and seat cover with padding

Driver's airbag

1. Components Airbag module Steering wheel Steering column
2. Procedure Replace faulty components

Passenger airbag

1. Components Airbag module Instrument panel trim Supporting tube (if damaged)
2. Procedure Replace faulty components

Side airbag, front/rear

1. Components Airbag module Door trim panel Door in white Seat
2. Procedure Replace faulty components

Head airbag (AHPS)

1. Components Airbag module Trim, A-pillar Roofliner Trim, B-pillar (if damaged) Trim, C-pillar (if damaged) Connection/mounting (on side frame)
2. Procedure Replace faulty components

Knee airbag

1. Components Panel (driver's side) Lower section of glovebox Active knee protector (driver's and passenger sides)
2. Procedure Replace faulty components

Passive knee protector

1. Components Panel (driver's side) Glovebox incl. knee protector (passenger side)
2. Procedure Replace faulty components Check fastening elements

72 12 ... Unlocking/locking airbag plug connections

Following versions of plug connections on airbag module/gas generator are possible

1. Airbag plug connection on gas generator/airbag module is offset by 90°
2. Airbag plug connection on gas generator/airbag module is straight (3 versions)

Airbag plug connection on gas generator/airbag module offset by 90°

There are two ways of unlocking this airbag plug connection on the gas generator/airbag module

Method 1

Simultaneously pull cover (1) upwards at lugs on left and right (2).

Scheme 41

Method 2

Insert a narrow screwdriver into recess (1) in housing (2).

Carefully prise cover (3) off (4).

Scheme 42

Cover (1) is not positioned higher than housing (2).

The airbag plug connection is unlocked and can now be detached from the gas generator/airbag module.

Scheme 43

Installation

After attaching airbag plug connection to gas generator/airbag module, press cover (1) downwards until it rests flat on housing.

Check that it catches properly.

Scheme 44

Airbag plug connection on gas generator/airbag module is straight (2 versions)

Version 1

Press locking/unlocking plate (1) at edge (4).

Locking/unlocking plate (1) snaps upwards at opposite edge (3) and releases detent lug (2).

Scheme 45

The airbag plug connection is unlocked and can now be detached from the gas generator/airbag module.

Scheme 46

Installation

After attaching airbag plug connection to gas generator/airbag module, check whether detent lug (2) is visible in opening of locking/unlocking plate (1).

Only if the detent lug (2) is visible will the airbag plug connection gas generator/airbag module be correctly engaged.

Scheme 47

Version 2

Press locking/unlocking plate (1) on edge (3) and pull plug (2) out of plug housing (4).

Installation

Only if the detent lug is visible in opening (5) will the gas generator/airbag module plug connection be correctly engaged.

Scheme 48

Version 3

Press lock button (1) and pull out plug (2) up to initial engagement position.

Detach plug (2) from firing pellet.

Installation

Insert plug connection in initial engagement position in gas generator/airbag module and engage in final engagement position.

Scheme 49

Illustration of version 3 with gas generator

1. Initial engagement position
2. Final engagement position

1. Lock button
2. Gas generator

Scheme 50

Version 4 - Crash-active head restraint

Press locking clip at edge and disconnect plug (1).

Installation

Check for correct engagement.

Scheme 51

72 12 000 Removing and installing/replacing airbag module on passenger side

Necessary preliminary tasks

1. Disconnect battery negative lead . See «61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e9293__61-20-900-disconnecting-and-connecting) .
2. Remove glovebox . See «51 16 366 REMOVING AND INSTALLING RIGHT GLOVEBOX WITH HOUSING»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-16-366-removing-and-installing) .

Car and airbag module up to 03/2006

Unlock plug connection (1) and disconnect.

Note. Secure airbag module on passenger side (3) against falling out.

Unscrew nuts (2).

Tightening torque 72 12 01AZ , 72 12 AIRBAG MODULES .

Remove airbag module on passenger side (3) towards bottom.

Scheme 52

Car + airbag module from 03/2006

Unlock plug connections (1) and disconnect.

Note. Secure airbag module against falling out.

Unscrew nuts (2).

Tightening torque 72 12 01AZ , 72 12 AIRBAG MODULES .

Remove airbag module in downwards direction.

Scheme 53

Replacement in car up to 03/2006 only, with airbag module from 03/2006

Note. Before installing the airbag module on the passenger side (2), it is necessary to fit the accompanying firing cable (4) and secure it with the accompanying foam sticker pads (5).

Insert plug connections (1) and (3) (pay attention to color coding).

Attach accompanying foam sticker pads (5) as follows

1. One foam sticker pad (5) each to both outer edges (A) and (B) of airbag module on passenger side (2)
2. One foam sticker pad (5) in the middle so as to leave a free length L = 190 ± 10 mm up to cable entry into the firing cable plug (4)

Scheme 54

Clip firing cable plug (4) into installation position in car.

Note. Subsequent installation is the same as for the car and airbag module from 03/2006 version.

72 12 050 Removing and installing side airbag (sport seat)

Necessary preliminary tasks

1. Disconnect battery negative lead . See «61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e9293__61-20-900-disconnecting-and-connecting) .
2. Remove rear panel on front seat . See «52 13 198 REMOVING AND INSTALLING/REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST»(ref-351051-S24494301482009121800000) .
3. Remove front seat . See «SEATS - REPAIR (CONVERTIBLE/COUPE)»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293) or «SEATS - REPAIR (SEDAN)»(ref-351051) .

Detach cable tie.

Release airbag wiring harness (2) from cable holders on seat mechanism.

Raise release clip (3) and pull plug (4) out of plug housing (1).

Note. If necessary, release yellow plug housing (1) from holder on seat mechanism.

Scheme 55

Unclip cable holder (1) from seat mechanism (2).

Scheme 56

Unscrew nuts (1).

Installation

Replace nuts.

Tightening torques 72 12 02AZ , 72 12 AIRBAG MODULES .

Scheme 57

Installation

Make sure wiring harness is correctly laid.

Assemble front seat.

72 12 060 Removing and installing/replacing left or right head airbag

Necessary preliminary tasks

1. Disconnect battery negative lead . See «61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e9293__61-20-900-disconnecting-and-connecting) .
2. Follow «instructions»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-unlockinglocking-airbag-plug) for unlocking and locking airbag plug connections
3. Remove roofliner . See «51 44 011 REMOVING AND INSTALLING OR REPLACING ROOFLINER (WITH SLIDE/TILT SUNROOF)»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#body-equipment-repair-e9293-m3__51-44-011-removing-and-installing) .

Head airbag installation summary

Scheme 58

Release screw (1) on end fitting.

Tightening torque 72 12 05AZ , 72 12 AIRBAG MODULES .

Release screw (2) on folding pack holder.

Tightening torques 72 12 04AZ , 72 12 AIRBAG MODULES .

Folding pack holder (3) is screwed to trim for roof pillar at front.

Installation

If screws (1...3) slip, coat them with Loctite.

If necessary, lever out clip-mounted holder.

Scheme 59

If necessary, slide wiring harness (2) to one side to release screw (1) on folding pack holder.

Tightening torque 72 12 04AZ , 72 12 AIRBAG MODULES .

Release screw (3) from folding pack holders.

Tightening torques 72 12 04AZ , 72 12 AIRBAG MODULES .

Installation

If screws (1) and (3) slip, coat them with Loctite.

If necessary, lever out clip-mounted holder.

Scheme 60

Unlock plug connection (4) and disconnect.

Release screws (1) on B-pillar ramp.

Tightening torque 72 1206AZ , 72 12 AIRBAG MODULES .

Unscrew bolt (3).

Tightening torque 72 12 03AZ , 72 12 AIRBAG MODULES .

Remove gas generator (5) with head airbag.

Scheme 61

72 14 ... Removing and installing/replacing Top Tether eyelets for child seat

Note. Two or three Top Tether eyelets are installed, depending on the model.

Lever out covers (1) and release screws underneath.

Remove Top Tether eyelets (2).

Tightening torque 52 24 03AZ , see 52 24 REAR SEAT (NORMAL), MANUAL .

Scheme 62

Scheme 63

See also:
• 61 00 ... REPAIRING AIRBAG CABLES
• 61 00 ... NOTES ON HANDLING OPTICAL FIBERS
• SEATS - REPAIR (CONVERTIBLE/COUPE)
• 52 14 ... REMOVING AND INSTALLING OR REPLACING TRIM COVER FOR OUTER FITTING ON FRONT SEAT
• 52 14 041 REMOVING AND INSTALLING OR REPLACING INNER COVER ON LEFT OR RIGHT FRONT SEAT
• 52 14 400 REPLACING COVER FOR LEFT OR RIGHT FRONT SEAT
• 52 14 405 REPLACING BACKREST COVER FOR LEFT OR RIGHT FRONT SEAT
• 72 11 SEAT BELTS
• 51 43 148 REMOVING AND INSTALLING OR REPLACING TRIM ON LEFT OR RIGHT DOOR PILLAR (TOP)
• 51 43 150 REMOVING AND INSTALLING OR REPLACING TRIM FOR LEFT OR RIGHT DOOR PILLAR (BOTTOM)
• 51 46 001 REMOVING AND INSTALLING PANEL FOR REAR WINDOW SHELF (PARCEL SHELF)
• 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD
• 51 16 366 REMOVING AND INSTALLING RIGHT GLOVEBOX WITH HOUSING
• 72 12 AIRBAG MODULES
• 51 44 011 REMOVING AND INSTALLING OR REPLACING ROOFLINER (WITH SLIDE/TILT SUNROOF)
• 52 24 REAR SEAT (NORMAL), MANUAL
• Safety regulations
• Notes on scrapping
• Deactivation/activation pyrotechnical components
• Unlocking/locking airbag plug connections
• Check seat belt
• Checklist for seat belt
• Procedure after airbag triggering
• safety regulations