Seats - Repair - e92/93 BMW M3 E90

52 14 ... Additional work in event of faulty drive/gearing for longitudinal adjustment

Release screws (1) of rockers for seat height adjustment.

Installation

Carefully bend side section back and feed rocker out of top rail.

Tilt front seat back.

Scheme 1

Unfasten plug connection (1) and disconnect.

Scheme 2

Unclip central connector (2) from seat mechanism.

Unclip control units (1) .

Scheme 3

Unfasten plug connection (1) and disconnect.

Scheme 4

Bend metal tab (1) open.

Scheme 5

Lift drive (1) and flex shaft (2) out of guide (4) in direction of arrow.

Detach drive (1) from rubber mounts (3).

Detach flex shaft (3) from drive (1).

Scheme 6

Release screws (1) at front.

Scheme 7

Installation

Install new drive for longitudinal seat adjustment.

Move front seat forwards.

Release screws (1) at rear.

Lift out front seat and assemble.

Scheme 8

Installation

1. Make sure flex shaft is correctly fitted on drive
2. Carpet must not get between seat rails and floor pan in area of fastening points (grating noises)
3. Powerlok screws must be replaced and must not be reused
4. Powerlok screws are mechanical screw locks with trilobular threads
5. Insert all screws loose to avoid twisting
6. Tighten down all screws to specified torque Tightening torque 52 10 1AZ, see «52 10 FRONT SEATS»(/bmw/m3/e90-2007-2013/remont/seats/#seats-tightening-torques-e9293__52-10-front-seats) .

52 14 ... Performing function check with adapter cable (for seat repairs)

Special tools required

1. 61 4 360

GENERAL ELECTRICAL SYSTEM - SPECIAL TOOLS

Note. The function check on a repaired driver's or front passenger seat can be performed outside the vehicle by using adapter cable 61 4 360 .

Scheme 9

Use

Adapter cable 61 4 360 is connected to vehicle wiring harness (1) and removed seat (2).

Scheme 10

52 14 ... Removing and installing or replacing carrier of outer cover on left or right front seat

Necessary preliminary tasks

1. Remove outer cover . See «52 14 040 Removing and installing or replacing outer covers on left or right front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-040-removing-and-installing) or «52 16 040 Removing and installing or replacing outer covers on left or right front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-16-040-removing-and-installing) .

Release screws (1).

Remove carrier section and carefully feed out wiring harness to prevent retaining tabs from being damaged.

Installation

Make sure the wiring harness is routed correctly.

Scheme 11

52 14 ... Removing and installing or replacing trim cover (headrest trim) on left or right front seat

Necessary preliminary tasks

1. Remove «trim for release handle»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)
2. Remove «head restraint»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-390-removing-and-installing)

Release screws (1).

Remove trim cover by pulling upwards.

Scheme 12

Remove slide (1) for headrest guide cover.

Pull off foam (2) upwards and to side.

Scheme 13

Release screws (1).

Remove trim cover (2) for seat belt guide.

Installation

Insert mandrel straight.

Scheme 14

Remove trim cover (1).

Scheme 15

52 14 ... Removing and installing or replacing trim cover for outer fitting on front seat

Necessary preliminary tasks

1. Remove «carrier for front cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)

Release screw.

Installation

Fit tab (1) on cover (2).

Scheme 16

Scheme 17

1. Remove cover from guide and turn towards bottom rear.
2. Unclip cover upwards and remove.

52 14 ... Removing and installing or replacing trim cover for upper belt loop on left or right

Lift out cover cap (1) from below with plastic wedge.

Scheme 18

Release screw (1).

Installation

Replace screw (1).

Remove finisher.

Scheme 19

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!

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.

Scheme 20

Release screw on belt guide.

Tightening torque 72 11 03AZ, see 72 11 SEAT BELTS .

Scheme 21

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 22

52 14 ... Removing and installing or replacing trim for release handle on front left or right seat

Necessary preliminary tasks

1. Remove «rear panel»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-198-removing-and-installing)
2. 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) .

Release screw (1).

Unclip side trim cover from backrest.

Installation

Place seat belt between seat belt guide and trim cover.

Make sure the trim cover is fitted correctly in the guide.

Scheme 23

Unfasten plug connection (1) and disconnect.

Replacement only

Unclip toggle switch.

Scheme 24

52 14 ... Replacing seatback release (LVK module) for left or right front seat

Necessary preliminary tasks

1. Remove «trim cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)

Detach backrest cover from metal retainer.

Lever out welt in marked area.

Scheme 25

Disengaging Bowden cable from seatback release

Lever out cable counter-support (2).

Unhook Bowden cable nipple (1).

Scheme 26

Mark position of seatback release.

Scheme 27

Release screws (1).

Scheme 28

Unclip wiring harness (2).

Remove backrest release (1) from backrest frame downwards in direction of arrow.

Scheme 29

52 14 000 Removing and installing left or right front seat (normal/electric)

Installation

1. Powerlok screws must be replaced and must not be reused
2. Powerlok screws are mechanical screw locks with trilobular threads

Move seat to upper back position.

Remove seat runner trims.

Release and dispose of screws (3).

Move front seat forwards and position flush with seat runners.

Release and dispose of screws (1).

Scheme 30

Unfasten plug connection (1) and disconnect.

Lift out front seat.

Installation

1. Carpet must not get between seat rails and floor pan in area of fastening points (grating noises)
2. Replace microencapsulated screws
3. Insert all screws loose to avoid twisting
4. Tighten down all screws to specified torque Tightening torque: 52 10 1AZ, see «52 10 FRONT SEATS»(/bmw/m3/e90-2007-2013/remont/seats/#seats-tightening-torques-e9293__52-10-front-seats) .

52 14 028 Replacing backrest release cable for front left or right seat

Necessary preliminary tasks

1. Partially remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-405-replacing-backrest-cover)
2. Remove «trim cover for outer fitting»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)
3. Remove «inner cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-041-removing-and-installing)
4. Remove seat belt pretensioner . See «72 11 041 REMOVING AND INSTALLING OR REPLACING FRONT LEFT OR RIGHT LOWER BELT FITTING (SEAT BELT PRETENSIONER)»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-041-removing-and-installing) .
5. Disconnect airbag module plug connection . See «72 12 050 REMOVING AND INSTALLING SIDE AIRBAG (SPORT SEAT)»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-050-removing-and-installing) .
6. Remove coupling gear . See «72 11 033 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT SEAT BELT»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-033-removing-and-installingreplacing) .

Disengaging Bowden cable from LVK module

Lever out cable counter-support (2).

Unhook Bowden cable nipple (1).

Unclip bracket for Bowden cable from backrest frame.

Scheme 31

Remove toothed segment cover (1) as follows

Scheme 32

1. Raise cover in upward direction
2. Slide cover upwards and detach

Note. Before removing the backrest, it is essential to move the backrest forwards

Pull Bowden cable (1) and press backrest forwards.

Scheme 33

Tunnel side

Release screw (1).

Installation

Screw (1) must be replaced.

Tightening torque 52 10 07AZ, see 52 10 FRONT SEATS .

Scheme 34

Door side

Release nut on opposite side from stud (1).

Drive out stud (1) with plastic mallet.

Installation

Stud (1) and nut must be replaced.

Tightening torque 52 10 08AZ, see 52 10 FRONT SEATS .

Scheme 35

Remove backrest frame from seat mechanism as follows

Lever tunnel-side backrest frame with screwdriver over bushing.

Then remove backrest frame in upward direction by pulling with alternate movements.

Tunnel-side plastic bushing (1) must not be damaged.

Scheme 36

Disengage return spring (1).

Installation

Replace return spring (1).

Note. Cover working area.

Do not allow any chips to get into the seat and backrest mechanisms.

Mark rivet (2) with center punch and drill out.

Scheme 37

Lever out cover (1) with screwdriver.

Scheme 38

Installation

Before fitting kinematic assembly, apply a thin coating of grease to contact surface.

Scheme 39

Installation

Engage return spring (1) before screwing kinematic assembly into place.

Scheme 40

Installation

Rivet is replaced by a stud.

Nut must be screwed on on inside of backrest.

Lug (3) of kinematic assembly must be positioned next to stop (2).

Screw on kinematic assembly.

Tightening torque: 52 10 09AZ, see 52 10 FRONT SEATS .

Check kinematic assembly for ease of movement.

Scheme 41

Installation

Press cover (1) with positioning pin onto backrest frame.

Scheme 42

Overview of finish-assembled (new) Bowden cable from spare part kit .

Scheme 43

Backrest mounting on door side

Scheme 44

1. Install door-side backrest link (1).
2. Backrest link (1) must be joined centrally on blocking cam (2).
3. Connect stud and tighten nut hand-tight.

Backrest mounting on tunnel side

Scheme 45

1. Install tunnel-side backrest strut. IMPORTANT: Plastic bushing must not be damaged
2. Tighten screw hand-tight. NOTE: Tighten down stud and screw only after mounting backrest on both sides. Tightening torque: Stud on door side: 52 10 08AZ, see «52 10 FRONT SEATS»(/bmw/m3/e90-2007-2013/remont/seats/#seats-tightening-torques-e9293__52-10-front-seats) . Screw on tunnel side: 52 10 07AZ, see «52 10 FRONT SEATS»(/bmw/m3/e90-2007-2013/remont/seats/#seats-tightening-torques-e9293__52-10-front-seats) .

Installation

Install toothed segment cover (1).

Make sure Bowden cable is in correct position along spacer

Assemble LVK module and front seat.

Scheme 46

52 14 030 Removing and installing/replacing backrest frame on left or right front seat

Necessary preliminary tasks

1. Remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-405-replacing-backrest-cover)
2. Remove «seatback release»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-replacing-seatback-release)
3. Remove microswitch . See «61 31 235 REPLACING MICROSWITCH ON LEFT OR RIGHT FRONT SEAT»(/bmw/m3/e90-2007-2013/remont/door-locks-anti-theft-systems/#general-electrical-system-repair-e9293__61-31-235-replacing-microswitch-on) .
4. Remove coupling gear . See «72 11 033 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT SEAT BELT»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-033-removing-and-installingreplacing) .

Note. Before removing the backrest, it is essential to move the backrest forwards

Tunnel side

Release screw (1).

Installation

Screw (1) must be replaced.

Tightening torque 52 10 07AZ, see 52 10 FRONT SEATS .

Door side

Release nut on opposite side from stud (1).

Drive out stud (1) with plastic mallet.

Installation

Stud (1) and nut must be replaced.

Tightening torque 52 10 08AZ, see 52 10 FRONT SEATS .

Remove backrest frame from seat mechanism as follows

Lever tunnel-side backrest frame with screwdriver over bushing.

Then remove backrest frame in upward direction by pulling with alternate movements.

Tunnel-side plastic bushing (1) must not be damaged.

Backrest mounting on door side

1. Install door-side backrest link (1).
2. Backrest link (1) must be joined centrally on blocking cam (2).
3. Connect stud and tighten nut hand-tight.

Backrest mounting on tunnel side

1. Install tunnel-side backrest strut. IMPORTANT: Plastic bushing must not be damaged
2. Tighten screw hand-tight. NOTE: Tighten down stud and screw only after mounting backrest on both sides. Tightening torque: Stud on door side: 52 10 08AZ, see «52 10 FRONT SEATS»(/bmw/m3/e90-2007-2013/remont/seats/#seats-tightening-torques-e9293__52-10-front-seats) . Screw on tunnel side: 52 10 07AZ, see «52 10 FRONT SEATS»(/bmw/m3/e90-2007-2013/remont/seats/#seats-tightening-torques-e9293__52-10-front-seats) .

Replacement only

Remove inertia reel unit . See 72 11 033 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT SEAT BELT .

Remove lumbar cushion and valve housing/drive unit on front seat. See 52 16 050 Removing and installing or replacing lumbar cushion on front seat , 52 16 055 Replacing an air cushion for left or right backrest width adjustment or 52 16 058 Removing and installing or replacing valve housing for lumbar cushion .

52 14 040 Removing and installing or replacing outer covers on left or right front seat

Move seat upwards.

Lift out bottom tabs (2) and detach cover from carrier.

Unclip cover (1) at top.

Unfasten plug connection and disconnect.

Scheme 47

Replacement only

Raise tabs slightly and remove switch cluster (1).

Installation

Tabs and retainers must not be damaged.

Scheme 48

52 14 041 Removing and installing or replacing inner cover on left or right front seat

Necessary preliminary tasks

1. Remove «front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-000-removing-and-installing)

Note. Press seat belt pretensioner to the side.

Release screws.

Remove cover.

Installation

Fit tab (1) of seat cover on cover (2).

Scheme 49

52 14 198 Removing and installing or replacing rear panel on left or right front seat backrest

Release screws (1).

Scheme 50

1. Carefully pull back rear panel.
2. Remove rear panel by pulling downward.

Installation

Insert rear panel at top and slide upwards.

Force in guide on tunnel side.

Force in guide on airbag side.

Pull at side to check guide in backrest frame for correct seating.

Scheme 51

52 14 390 Removing and installing or replacing front left or right head restraint

Necessary preliminary tasks

1. Remove «belt guide»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)

Remove headrest.

Scheme 52

52 14 400 Replacing cover for left or right front seat

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove «front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-000-removing-and-installing)
2. Remove «rear panel»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-198-removing-and-installing) on front seat backrest
3. Remove «trim cover for outer fitting»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing) on front seat
4. Remove «inner cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-041-removing-and-installing)
5. Remove seat belt pretensioner . See «72 11 041 REMOVING AND INSTALLING OR REPLACING FRONT LEFT OR RIGHT LOWER BELT FITTING (SEAT BELT PRETENSIONER)»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-041-removing-and-installing) .

US/CDN front passenger seat (with OC3 mat) only

Enabling seat occupancy detector (OC3 mat)

1. Connect BMW programming system
2. Code airbag control unit
3. Clear fault memory if necessary

Only when replacing OC3 mat with padding

OC3 mat (1) is secured on the left and right sides in the marked area with a longitudinal trim wire for transportation.

Carefully remove adhesive tape (2).

Scheme 53

Removing transportation lock

Carefully release retainers in marked area on left and right from longitudinal trim wires (1).

Scheme 54

Lift seat cover (1) out of seat mechanism.

Scheme 55

Lever welt (1) out of seat mechanism.

Scheme 56

Remove seat cover (1) with padding towards front/top.

Scheme 57

Version with seat heater and/or with seat occupancy detector (OC3 mat)

Release the corresponding plug connections depending on the version and disconnect.

Pull seat cover (1) with padding forward a little and feed cable (2) out.

Remove seat cover (1) with padding towards front/top.

Scheme 58

Carefully detach all retainers in side area from longitudinal wires (1).

Pull trim wires (1) forward out of seat cover.

Carefully fold back seat cover and release retainers from crosswires (2).

Remove seat cover from padding.

Scheme 59

Replacement only

If necessary, cut new seat cover to size and insert trim wires.

Scheme 60

Installation

Bend new clips (2) with special tool .

Scheme 61

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in cover
5. Seat cover

52 14 405 Replacing backrest cover for left or right front seat

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove «front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-000-removing-and-installing)
2. Remove seat side airbag . See «72 12 050 REMOVING AND INSTALLING SIDE AIRBAG (SPORT SEAT)»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-050-removing-and-installing) .
3. Remove «trim cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing) .
4. Remove «inner cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-041-removing-and-installing)
5. Remove «trim cover for outer fitting»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)

Detach backrest cover (1) from backrest frame.

Disengage bracing (2).

Installation

Bracing (2) must be fitted under side airbag .

Scheme 62

Detach backrest cover (1) from backrest frame.

Scheme 63

Detach backrest cover from metal retainer.

Lever out welt in marked area.

Release the corresponding plug connections depending on the version and disconnect.

Detach cable tie.

Pull off backrest cover (1) with padding sideways and towards top from backrest frame.

Scheme 64

Release retainers on left/right.

Scheme 65

Release all retainers in marked area.

Remove backrest cover from padding.

Note. Remove all remnants of retainers from backrest cover and padding.

Scheme 66

Installation

Bend new retainer (2) with special tool 52 0 050.

Scheme 67

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in backrest cover
5. Backrest cover

Replacement only

Pull trim wires out of backrest cover.

Cut new backrest cover to size and insert trim wires.

Scheme 68

52 14 415 Replacing padding for left or right front seat

Operation is described in

Replace seat cover for left or right front seat.

52 14 420 Replacing padding for left or right front seat backrest

This operation is described in section on

Replace backrest cover for left or right front seat .

52 14 899 Additional work in event of faulty longitudinal adjustment drive

Necessary preliminary tasks

1. Set seat tilt adjustment to max. up setting

Release screw (1) on actuator drive (2) of longitudinal seat adjustment.

Scheme 69

Release screw (1) on actuator drive (2) of longitudinal seat adjustment and detach actuator drive (2).

Operate button for longitudinal seat adjustment

Scheme 70

1. No function: Disconnect plug for longitudinal seat adjustment Connect new servodrive and check function Gearing is OK if actuator drive runs Assemble front seat
2. Actuator drive running: Transmission for longitudinal seat adjustment defective! Continue with disassembly of faulty gearing for longitudinal seat adjustment

Removing faulty gearing (1) for longitudinal seat adjustment

Note. For purposes of clarity, the backrest frame and seat cover are shown removed.

Scheme 71

1. (2) Input shaft
2. (3) Internal gearing

Cut through drive shaft (2) from rear with pneumatic saw (1).

Scheme 72

Remove drive shaft (1) from gear (2).

Scheme 73

Release screw (1) and remove gear (2).

Scheme 74

Adjust front seat over rest of drive shaft (1).

Release screws on floorpan.

Remove front seat.

Note. If gearing (4) is faulty: Pull off cover (2) Unscrew screws (3). Pull off gearing (4)

Replace seat mechanism on front seat.

52 16 ... Replacing heating element for left or right front seat (M3 sport seat)

Necessary preliminary tasks

1. Remove «seat fabric»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-16-400-replacing-cover-for)
2. Remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-16-405-replacing-backrest-cover)

Note. Side heating elements (side sections) are bonded with a foam section and cannot be separated from each other without causing damage. Foam section and heating elements must be replaced.

Check new foam section

1. No obvious damage or material defects
2. All trim wires present in foam
3. No bubbles in foam section
4. No dirt/contamination on foam or residual foam
5. Pay attention to foam section on left and right

Check new heating elements

1. No obvious damage or material defects
2. All tear-off film pieces presents
3. Note variant by examining label on cable

Stick on bead parts at top (1) and bottom (2)

Scheme 75

1. Detach adhesive film from left or right bead parts in succession and stick on heating elements along bead part edges.
2. Press down evenly in outwards direction

Stick on bead parts (1)

Scheme 76

1. Detach adhesive film from left or right bead part (1) and stick on heating element along bead part edges.
2. Press down evenly in outwards direction

Check laying of heating elements

1. Heating elements laid without folds
2. Heating elements correctly positioned
3. All bonding surfaces stuck on

52 16 040 Removing and installing or replacing outer covers on left or right front seat

Move seat upwards.

Lever out tabs (2) at bottom.

Unclip cover (1) at top and detach cover from carrier section.

Unfasten plug connection and disconnect.

Replacement only

Carefully raise retainers and remove switch cluster.

Installation

Tabs and retainers must not be damaged.

Scheme 77

52 16 048 Removing and installing thigh support on left or right front seat

Release thigh support and move forward.

Lever welt (1) of seat cover out of thigh support.

Scheme 78

Turn thigh support (1) over.

Detach trim wire from metal lugs.

Scheme 79

Disconnect spring (1).

Scheme 80

Release screws (1).

Scheme 81

Release thigh support and pull forward to remove from seat mechanism.

View of thigh support mechanism

Scheme 82

1. Locking mechanism for thigh support

52 16 050 Removing and installing or replacing lumbar cushion on front seat

Necessary preliminary tasks

1. Partially remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-405-replacing-backrest-cover)

Disconnect plug connection (1) at drive unit.

Scheme 83

Disconnect plug connection (1).

Scheme 84

Lift fleece tabs of lumbar support cushion carrier from plastic clips (1).

Installation

Hook lumbar support cushion over first and fourth wire.

Scheme 85

Detach lumbar cushion (2) from spring wire.

Unclip air cushion (1) for backrest width adjustment with carrier from backrest frame.

Installation

Make sure the carrier for backrest width adjustment is fitted correctly on the backrest frame.

Scheme 86

Scheme 87

Disconnect air hoses to remove corresponding components.

If tight, (carefully) heat up the parting points slightly.

Installation

Check lumbar cushion at top (1) and bottom (2) for damage.

Lay air hoses (3) without kinks.

Scheme 88

Installation

Carry out function check .

52 16 055 Replacing an air cushion for left or right backrest width adjustment

Necessary preliminary tasks

1. Remove «rear panel on front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-198-removing-and-installing)
2. Partially remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-405-replacing-backrest-cover)

Unclip carrier for backrest width adjustment from backrest frame.

Installation

Make sure the carrier for backrest width adjustment is fitted correctly on the backrest frame.

Install air hoses without kinks.

Scheme 89

Disconnect air hoses.

Installation

Adapt length of air hose from new part.

Connect air hoses to brass coupling.

If tight, (carefully) heat up the air hoses slightly.

Scheme 90

Note. Carry out function check .

52 16 058 Removing and installing or replacing valve housing for lumbar cushion

Note. Operation is described in: Removing and installing lumbar support cushion on front seat

52 16 400 Replacing cover for left or right front seat

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove «front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-400-replacing-cover-for) .
2. Remove «carrier of outer cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing) .
3. Remove «inner cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-041-removing-and-installing) .
4. Remove seat belt pretensioner . See «72 11 041 REMOVING AND INSTALLING OR REPLACING FRONT LEFT OR RIGHT LOWER BELT FITTING (SEAT BELT PRETENSIONER)»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-11-041-removing-and-installing) .

US/CDN front passenger seat (with OC3 mat) only

Enabling seat occupancy detector (OC3 mat)

1. Connect BMW programming system
2. Code airbag control unit
3. Clear fault memory if necessary

Only when replacing OC3 mat with padding

OC3 mat (1) is secured on the left and right sides in the marked area with a longitudinal trim wire for transportation.

Carefully remove adhesive tape (2).

Removing transportation lock

Carefully release retainers in marked area on left and right from longitudinal trim wires (1).

Release left and right screws (1).

Remove seat panel.

Scheme 91

Lever welt (1) out of seat mechanism.

Lever welt (1) out of seat mechanism.

Scheme 92

Unfasten thigh support and pull completely towards front.

Lever welt (1) out of thigh support.

Turn thigh support (1) over.

Detach trim wire from metal lugs.

Version with seat heater and/or with seat occupancy detector (OC3 mat)

Release the corresponding plug connections depending on the version and disconnect.

Pull seat cover (1) with padding forward a little and feed cable (2) out.

Remove seat cover (1) with padding towards front/top.

Release all retainers in marked areas.

Scheme 93

Detach all retainers in side area from longitudinal welts (1).

Carefully turn seat cover over and release retainers from crosswelt (2).

Remove seat cover from padding.

Scheme 94

Replacement only

Pull trim wires (1) out of seat cover (2).

Installation

If necessary cut hole in new seat cover for trim wires.

Insert trim wires.

Scheme 95

1. (3) Seat heater cable

Installation

Insert new retainer (2) with special tool 52 0 050 and bend closed.

Scheme 96

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in seat cover
5. Seat cover

52 16 400 Replacing seat cover for left or right front seat (M3 sport seat)

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove «front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-000-removing-and-installing)
2. Remove «rear panel on front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-198-removing-and-installing)
3. Remove outer cover . See «52 14 040 Removing and installing or replacing outer covers on left or right front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-040-removing-and-installing) or «52 16 040 Removing and installing or replacing outer covers on left or right front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-16-040-removing-and-installing) .
4. Remove «thigh support»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-16-048-removing-and-installing)

When replacing seat cover

If seat cover is defective, seat cover and padding with OC3 mat must be replaced together.

New seat cover is supplied with padding, OC3 mat and if necessary seat heating.

When replacing padding or OC3 mat

If OC3 mat or padding is defective, both parts must be replaced together.

These must be fitted with the seat cover from the car.

Enabling seat occupancy detector (OC3 mat)

1. Connect BMW programming system
2. Code airbag control unit
3. Clear fault memory if necessary

Only when replacing OC3 mat with padding

OC3 mat (1) is secured on the left and right sides in the marked area with a longitudinal trim wire for transportation.

Carefully remove adhesive tape (2).

Removing transportation lock

Carefully release retainers in marked area on left and right from longitudinal trim wires (1).

Unlock retaining lugs (1).

Remove seat trim (2) downwards.

Installation

Seat trim (2) must not be damaged.

Scheme 97

Unlock plug connection (1) for seat heating and disconnect.

Disconnect cable straps.

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

Scheme 98

Release screw (1).

Lever clip (2) out of seat cover on left and right.

Installation

If necessary, replace faulty clip.

Remove trim (3) from inside of seat.

Scheme 99

Detach seat cover (1) from seat frame.

Scheme 100

Lever welt (1) out of seat frame completely.

Remove seat cover with padding towards front/top.

Version with seat heater and/or with seat occupancy detector (OC3 mat)

Release the corresponding plug connections depending on the version and disconnect.

Pull seat cover (1) with padding forward a little and feed wiring harness (2) out.

Remove seat cover (1) towards front/top.

Note. The operation Replacing seat cover with OC3 mat ends here.

Release all retainers in marked area.

Scheme 101

Detach all retainers in side area from longitudinal wires (1).

Pull side trim wires (1) forward out of seat cover.

Carefully fold back seat cover and release retainers from crosswire (2).

Remove seat cover from padding.

Scheme 102

Replacement only

Pull trim wires (1) out of seat cover.

Cut new seat cover to size and insert trim wires.

Scheme 103

Installation

Bend new retainers (2) closed with special tool 52 0 050.

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in cover
5. Seat cover

52 16 405 Replacing backrest cover for left or right front seat (M3 sport seat)

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove «front seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-000-removing-and-installing)
2. Remove seat side airbag . See «72 12 050 REMOVING AND INSTALLING SIDE AIRBAG (SPORT SEAT)»(/bmw/m3/e90-2007-2013/remont/airbag/#restraints-repair-e9293__72-12-050-removing-and-installing) .
3. Remove «trim cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)
4. Remove «inner cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-041-removing-and-installing)
5. Remove «trim cover for outer fitting»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-removing-and-installing)

Detach backrest cover (1) from backrest frame.

Disengage bracing (2).

Installation

Bracing (2) must be fitted under side airbag .

Detach backrest cover (1) from backrest frame.

Detach backrest cover from metal retainer.

Lever out welt in marked area.

Unfasten plug connection (1) and disconnect.

Disconnect cable tie (2) for seat heating.

Disengage wiring harness for seat heating from cable holders on seat mechanism.

Scheme 104

Padding is reinforced at corner points (1) and is guided under Bowden cable clip (2).

Installation

Engage reinforcement (1) in Bowden cable clip (2).

Scheme 105

Pull off backrest cover (1) with padding sideways and towards top from backrest frame (2).

Scheme 106

If necessary, release retainers on left/right.

Loosen retainers (1).

Fold back welt (2) with backrest cover (3).

Scheme 107

Release all retainers in marked area.

Remove backrest cover (1) from padding.

Note. Remove all remnants of retainers from backrest cover and padding.

Scheme 108

Replacement only

Pull trim wires (1) out of backrest cover.

Cut new backrest cover to size and insert trim wires (1).

Scheme 109

Installation

Bend new retainer (2) with special tool .

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in backrest cover
5. Backrest cover

52 24 ... Replacing left or right guide sleeves

Necessary preliminary tasks

1. Remove «air outlet trim grille»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-additional-work-in)

Unlock guide sleeves (1) and remove towards top.

Scheme 110

52 24 000 Removing and installing/replacing left or right rear seat

Unclip left or right rear seat towards top.

Raise rear seat approx. 30 cm and remove towards front.

Installation

Feed seat belt buckles (1) into openings in rear seat.

Scheme 111

Installation

Insert pin on rear seat (1) correctly into opening in rest side section (2).

Pin must not be damaged.

Scheme 112

52 24 008 Removing and installing or replacing left or right side section on rear seat backrest

Necessary preliminary tasks

1. Remove «rear seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-000-removing-and-installingreplacing)
2. Release rear-seat backrest and fold forward.

Removing rest side section

Scheme 113

1. Unclip in middle
2. Lever out at top from belt cover
3. Lift out rest side section

Installation

Unlock clip (1) and pull forwards out of body.

Engage clip (1) in rest side section.

If necessary, replace faulty clip (1).

Scheme 114

Installation

Insert rest side section under backrest mount (2).

Insert plastic tab (1) of rest side section in backrest mount (2).

Pin must not be damaged.

Scheme 115

52 24 010 Removing and installing / replacing backrest

Necessary preliminary tasks

1. Remove «backrest side section»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-008-removing-and-installing)

Release backrest and fold down.

Release screws (1) on backrest.

Remove backrest.

Scheme 116

52 24 030 Removing and installing complete armrest (filler element) for rear seat backrest

Press lock (1) and remove filler element (2).

Installation

Make sure filler element is correctly inserted in rear seat backrest.

Scheme 117

52 24 045 Removing and installing or replacing backrest frame

Necessary preliminary tasks

1. Remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-408-replacing-left-backrest)
2. Remove «locking unit»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-300-removing-and-installing)

52 24 300 Removing and installing or replacing locking unit at backrest (backrest frame release)

Necessary preliminary tasks

1. Partially remove «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-408-replacing-left-backrest)

Release screws (1).

Remove locking unit.

Scheme 118

52 24 390 Removing and installing or replacing left or right rear head restraint

Necessary preliminary tasks

1. Unlock backrest and tilt forward

Pull head restraint out of guide sleeves by moving backwards and forwards.

Scheme 119

52 24 400 Replacing seat cover for rear seat

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove «rear seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-000-removing-and-installingreplacing)

Unclip Isofix protective caps.

Installation

Make sure Isofix protective caps are correctly engaged.

Scheme 120

Lever out welt in area (1) with plastic wedge.

Unhook seat cover in area (2).

Unclip welt (3) from seat pan

Scheme 121

Detaching cover and padding

Scheme 122

1. Release all retainers in marked area.
2. Remove seat cover from padding
3. Remove remaining retainers from cover and padding

Installation

Insert new retainer (2) with special tool 52 0 050 and bend closed.

Scheme 123

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in seat cover
5. Seat cover

Replacing cover

Scheme 124

1. Pull all trim wires out of seat cover
2. If necessary, cut in take-up for trim wires of new cover
3. Push trim wires into new seat cover

52 24 408 Replacing left backrest cover for rear seat

Special tools required

1. 52 0 050

See SEATS - SPECIAL TOOLS .

Necessary preliminary tasks

1. Remove left «backrest cover»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-14-405-replacing-backrest-cover)

Unclip trim cover (1) for released button on left and right.

Installation

If necessary, replace faulty trim.

Scheme 125

Release screw (1).

Push through plastic pins.

Scheme 126

Unscrew nut (1).

Remove outer mount (2).

Scheme 127

Lever out welt from backrest cover all round with plastic wedge.

Scheme 128

Detaching cover and padding

Scheme 129

1. Release all retainers in marked area
2. Remove cover from padding
3. Remove remaining retainers from cover and padding

Installation

Insert new retainer (2) with special tool 52 0 050.

In so doing, enclose wire in padding and trim wire of cover and bend closed.

1. Padding
2. Retainer
3. Trim wire in padding
4. Trim wire in seat cover
5. Seat cover

Replacing cover

1. Remove all trim wires from cover
2. If necessary, cut pockets in new cover for trim wires
3. Push trim wires into cover pockets

Scheme 130

52 24 455 Replacing padding for rear seat

This operation is described in section on

1. Replacing «seat cover for rear seat»(/bmw/m3/e90-2007-2013/remont/seats/#seats-repair-e9293__52-24-400-replacing-seat-cover)

See also:
• 52 10 FRONT SEATS
• GENERAL ELECTRICAL SYSTEM - SPECIAL TOOLS
• 72 11 SEAT BELTS
• 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD
• AIRBAG GENERATOR
• 72 11 041 REMOVING AND INSTALLING OR REPLACING FRONT LEFT OR RIGHT LOWER BELT FITTING (SEAT BELT PRETENSIONER)
• 72 12 050 REMOVING AND INSTALLING SIDE AIRBAG (SPORT SEAT)
• 72 11 033 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT SEAT BELT
• 61 31 235 REPLACING MICROSWITCH ON LEFT OR RIGHT FRONT SEAT
• SEATS - SPECIAL TOOLS
• 52 14 040 Removing and installing or replacing outer covers on left or right front seat
• 52 16 040 Removing and installing or replacing outer covers on left or right front seat
• trim for release handle
• head restraint
• rear panel
• backrest cover
• inner cover
• seatback release
• 52 16 050 Removing and installing or replacing lumbar cushion on front seat
• 52 16 055 Replacing an air cushion for left or right backrest width adjustment
• 52 16 058 Removing and installing or replacing valve housing for lumbar cushion
• front seat
• Replace seat cover for left or right front seat.
• seat fabric
• backrest cover
• thigh support
• air outlet trim grille
• rear seat
• backrest side section
• backrest cover
• locking unit
• seat cover for rear seat