51 48... Removing and installing/replacing sound insulation/protective mat on left or right front door

Disconnect battery negative lead.
Remove airbag module on front door, refer to SIDE AIR BAG MODULE .

Disconnect LED with cable (1) from light housing (2).

Fig 1: Disconnecting LED With Cable From Light Housing

Pull Bowden cable (1) backwards and unclip from door handle.

Fig 2: Removing Bowden Cable

Release screws (1) and remove protective mat (2) for cable penetration.

Fig 3: Removing Protective Mat

CAUTION: Do not kink fiber optics cable. The bending radius of the fiber optics cable must not be less than 20 mm.

Detach central light source (1) from holder (2) towards top.

Fig 4: Detaching Central Light Source From Holder Towards Top

Disconnect plug connection (1) and detach fiber optics cable (2) from central light source.

Fig 5: Disconnecting Plug Connection & Detaching Fiber Optics Cable From Central Light Source

Release all cable ties on speaker unit.

Disconnect plug connection (1) on speaker unit (2) at bottom.

Fig 6: Disconnecting Plug Connection On Speaker Unit At Bottom

Disconnect plug connection (1) on wiring harness.

Fig 7: Disconnecting Plug Connection On Wiring Harness

Open clips (1) and wiring harness holder (2).

Expose wiring harness.

Fig 8: Opening Clips & Wiring Harness Holder

Release screws (1) and remove speaker unit (2).

Fig 9: Removing Speaker Unit

Release screw (1) and remove butyl compound (2) from cable penetration.

Fig 10: Removing Butyl Compound From Cable Penetration

Pull spacers (1) and (2) off stud bolts.

Installation:

Rear spacer (1) - long
Front spacer (2) - short

Fig 11: Installing Front (Short) & Rear (Long) Spacer

Press rubber grommet (1) with wiring harness through sound insulation/protective mat (2).

Fig 12: Pressing Rubber Grommet With Wiring Harness Through Sound Insulation/Protective Mat

Unfasten screws (1) to (3).

Fig 13: Unfastening Screws

CAUTION: Carefully remove seal (1). Do not damage sound insulation/protective mat (2). Material unravels.

Installation:

Lay 6 mm dia. butylene tape (sourcing reference: BMW Parts Service) for sealing all around sound insulation/protective mat.

Fig 14: Identifying Seal & Insulation/Protective Mat

Using special tool 00 9 317 (trim panel wedge), lever out bonding (1) of sound insulation/protective mat (2).

Carefully pull sound insulation/protective mat approx. 15 cm off stud bolts (3).

Feed wiring harness (4) and cable (5) out of sound insulation/protective mat.

Fig 15: Levering Out Bonding Of Sound Insulation/Protective Mat

Installation:

Attach sound insulation/protective mat to a stud bolt for securing airbag.
Feed in wiring harness and press rubber grommet through sound insulation/protective mat.
Seal cable penetration with butylene tape (sourcing reference: BMW Parts Service).

NOTE: Position of butylene tape (1) on inner door plate.

Fig 16: Identifying Position Of Butylene Tape On Inner Door Plate

NOTE: Position of butylene tape (1) on sound insulation/protective mat (2).

Fig 17: Identifying Position Of Butylene Tape On Sound Insulation/Protective Mat

CAUTION: When working with adhesive cleaners in enclosed rooms: Ensure room is well ventilated.
The adhesive areas must be dry and free from dust and grease.
After cleaning, do not touch the adhesive areas with bare hands.

If necessary, clean the specified adhesive area with adhesive cleaner (sourcing reference: BMW Parts Service).

Air drying time: 1 minute

Lay butylene tape with a diameter of 6 mm (sourcing reference: BMW Parts Service) in specified adhesive area.

Heat butylene tape (hot air blower) and firmly press down sound insulation/protective mat in specified adhesive area.

Contact pressure with hand roller: approx. 30 N/cm²

Manual contact pressure: approx. 10 N/cm²

NOTE: Firm thumb pressure has approx. 50 N/cm²