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Home >> BMW >> 2018 >> M4 2D Convertible, Automatic DCT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (Seats - Repair) >> Front Seat, Sports, EL >> 52 16 400 Replacing seat cover for left or right front seat (sports/electric) >> Special tools required:

Special tools required:

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WARNING: US/CND front passenger seat (with OC3 mat) only:
Seat cover must not be separated from padding.
All parts must be replaced completely and released with the diagnosis system in event of defective seat cover, seat heating, OC3 mat or padding.

Necessary preliminary tasks: 

Version with seat heating:

If necessary, disconnect plug connection (1).

Release cable strap (2).

Detach cable (3) from holder (4).

Fig 1: Releasing Cable Strap
G03124940Courtesy of BMW OF NORTH AMERICA, INC.

Detach cable (1) from holder (2).

Fig 2: Detaching Cable From Holder (Version With Seat Heating)
G03124941Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on Inside/outside.

Unclip clips (3) towards bottom and pull trim (2) out a little.

Fig 3: Identifying Clips & Screw On Trim
G03124942Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Pull trim (2) out a little and release screw (3).

Release clip (5) from carrier (4).

Remove trim (2) and carrier (4).

Fig 4: Removing Trim & Carrier
G03124943Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Cable holders (1) on carrier (2) must not be damaged.

Fig 5: Identifying Cable Holders On Carrier
G03124944Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Clips (1) on sports seat trim (2) must not be damaged.

Fig 6: Identifying Clips On Sports Seat Trim
G03124945Courtesy of BMW OF NORTH AMERICA, INC.

Version with seat occupancy detector:

If necessary, disconnect plug connection (1) from control unit (2).

Fig 7: Disconnecting Plug Connection From Control Unit (Version With Seat Occupancy Detector)
G03124946Courtesy of BMW OF NORTH AMERICA, INC.

Version with seat heating:

If necessary, release locks (1) and detach plug housing (2).

Fig 8: Releasing Locks & Detaching Plug Housing (Version With Seat Heating)
G03124947Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, press lock (1) downwards and detach cover (2).

Fig 9: Detaching Cover
G03124948Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1) for seat heating from plug housing (2).

Fig 10: Disconnecting Plug Connection For Seat Heating From Plug Housing
G03124949Courtesy of BMW OF NORTH AMERICA, INC.

Pull cable (1) out of holders (2).

Fig 11: Pulling Cable Out Of Holders
G03124950Courtesy of BMW OF NORTH AMERICA, INC.

E46 only:

Pull out tongue (1) on seat cover (2) on left/right.

Fig 12: Pulling Out Tongue On Seat Cover On Left/Right (E46)
G03124951Courtesy of BMW OF NORTH AMERICA, INC.

Detach seat cover (1) from seat frame (2).

Fig 13: Detaching Seat Cover From Seat Frame
G03124952Courtesy of BMW OF NORTH AMERICA, INC.

Pull out cover welt (1) completely from seat frame (2).

Fig 14: Pulling Out Cover Welt Completely From Seat Frame
G03124953Courtesy of BMW OF NORTH AMERICA, INC.

Fold in ends (1) on seat cover and push through under backrest (2) towards front.

Fig 15: Folding In Ends On Seat Cover & Pushing Through Under Backrest Towards Front
G03124954Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten thigh support and pull completely towards front. Bend open retaining plates (1) and remove cover piping (2).

Fig 16: Removing Cover Piping
G03124955Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Cushion (1) is secured at front with double-sided adhesive tape (3) to carrier (2).

Pull cushion (1) towards top off carrier (2).

Fig 17: Pulling Cushion Towards Top Off Carrier
G03124956Courtesy of BMW OF NORTH AMERICA, INC.

Lever trim wire (1) out of mounts (2).

Installation: 

Stick new double-sided adhesive tape (4) to carrier (3) or attach mount with spray adhesive.

Fig 18: Sticking New Double-Sided Adhesive Tape To Carrier
G03124957Courtesy of BMW OF NORTH AMERICA, INC.

Model without seat heating and without seat occupancy detector:

Remove seat cover (1) with thigh support (2) towards front/top.

Fig 19: Removing Seat Cover With Thigh Support
G03124958Courtesy of BMW OF NORTH AMERICA, INC.

Model with seat heating and/or with seat occupancy detector:

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

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

Fig 20: Identifying Cable & Cable
G03124959Courtesy of BMW OF NORTH AMERICA, INC.

US/CND front passenger seat (with OC3 mat) only:

New seat cover must be completely installed with padding, seat heating and OC3 mat.

Release seat occupancy detector:

Replacing support or sensor mat: 

Release clips (1) and (2) at rear left/right from support (3).

Fig 21: Releasing Clips At Rear Left/Right From Support
G03124960Courtesy of BMW OF NORTH AMERICA, INC.

Release all clips (1) on left/right and center (2) from support (3).

Fig 22: Releasing All Clips On Left/Right & Centre From Support
G03124961Courtesy of BMW OF NORTH AMERICA, INC.

Version with seat heating:

Installation: 

Note routing of seat heater cable (1).

Do not damage with clips.

Fig 23: Identifying Routing Of Seat Heater Cable (Version With Seat Heating)
G03124962Courtesy of BMW OF NORTH AMERICA, INC.

Release all retainers.

Remove seat cover from support (foam rubber section).

Remove all remnants of clips from seat cover and support.

Fig 24: Removing All Remnants Of Clips From Seat Cover & Support
G03124963Courtesy of BMW OF NORTH AMERICA, INC.

Remove support (1) from seat cover (2).

Fig 25: Removing Support From Seat Cover
G03124964Courtesy of BMW OF NORTH AMERICA, INC.

Version with seat heating:

Installation: 

If necessary, detach heating mat (1) from adhesive tape (2) of thigh support.

3 Seat heater cable

Fig 26: Detaching Heating Mat From Adhesive Tape Of Thigh Support
G03124965Courtesy of BMW OF NORTH AMERICA, INC.

Stick double-sided adhesive tape (2) to support (1) or coat with spray adhesive.

Fig 27: Sticking Double-Sided Adhesive Tape To Support
G03124966Courtesy of BMW OF NORTH AMERICA, INC.

Version with seat heater and/or with seat occupancy detector:

Installation: 

Feed seat heater cable (1) through bore hole (3).

Feed seat heater cable (2) through bore hole (4).

Fig 28: Installing Seat Heater Cable Through Bore Hole
G03124967Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

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

  1. Support
  2. Retainer
  3. Trim thread in support
  4. Trim thread in cover
  5. Seat cover
    Fig 29: Bending New Clips With Special Tool 52 0 050
    G03124968Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Support (2) must be coated with wax (1) to prevent grinding noises.

Do not remove wax (1) on support (2).

Fig 30: Identifying Wax On Support
G03124969Courtesy of BMW OF NORTH AMERICA, INC.

Passenger seat only (replacing support):

Installation: 

Make sure foam is not extensively damaged (malfunction of passenger seat occupancy detector).

Lay sensor mat connection without creasing into groove on support.

Fit new sensor mat (1) for passenger seat occupancy detector.

Align new sensor mat (1) on foam (2).

Feed plug (3) through bore hole (4).

Fig 31: Identifying Sensor Mat On Foam
G03124970Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Detach liner (1) at individual points and stick sensor mat (2) onto foam (3).

Fig 32: Installing Sensor Mat Onto Foam
G03124971Courtesy of BMW OF NORTH AMERICA, INC.

Replacing seat cover: 

Remove trim threads (1) from seat cover (2).

Cut new seat cover (2) to size and insert trim threads (1).

(3) Seat heater cable

Fig 33: Replacing Seat Cover
G03124972Courtesy of BMW OF NORTH AMERICA, INC.
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