51 48 070 Removing and installing/replacing sound insulation on left or right rear door

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IMPORTANT: INSTRUCTIONS FOR SOUND INSULATION are an essential part of these repair instructions and must be followed without fail.
Do not detach sound insulation in jerks (risk of damage).
Ensure watertightness of sound insulation after every repair (water ingress).

Necessary preliminary tasks:

Remove rear door trim panel, see 51 42 000 Removing and installing (replacing) rear left or right door trim panel .

If necessary, disconnect plug connection (1).

Position of sealing bead (3).

Feed wires (2) out of sound insulation (4).

Fig 1: Identifying Sealing Bead Area

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: When cutting through sealing bead (1), do not damage sound insulation (2) and if necessary cable.

With a suitable sharp cutting tool (3) cut through sealing bead (1) of sound insulation (2) in the area to be detached.

Clean bonding area with adhesive remover (sourcing reference: BMW Parts Department).

Air drying time: 1 minute

IMPORTANT:

Adhesive areas must be dry and free of dust and grease.

Once it has been cleaned, do not touch the adhesive area with bare hands.

Fig 2: Cutting Sealing Bead Of Sound Insulation Using Sharp Cutting Tool

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NOTE: Replacement:
Lay 6 mm dia. butyl rope (sourcing reference: BMW Parts Department) in specified adhesive area.
Heat butyl rope (hot air blower) and press down firmly on sound insulation all round.
Contact pressure with hand roller: approx. 20 N/cm²
Manual contact pressure: approx. 10 N/cm²

NOTE: Firm thumb pressure has approx. 30 N/cm²

NOTE: Position of butyl rope (1) on sound insulation (2).

Fig 3: Positioning Of Butylene Tape On Sound Insulation

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: A marking (2) is provided all round on the sound insulation (1).
Butylene tape (3) rests on or inside the marking (2).

Fig 4: Identifying Butylene Tape

Courtesy of BMW OF NORTH AMERICA, INC.