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 DOOR TRIM PANEL

NOTE: Position of sealing bead (1).

If necessary, disconnect plug connection (2).

Feed wires (3) out of sound insulation (4).

Fig 1: Identifying Sound Insulation, Plug Connection And Sealing Bead

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.

Fig 2: Cutting Sound Insulation Sealing Bead Using Tool

Courtesy of BMW OF NORTH AMERICA, INC.

When refitting:

Damaged sound insulation must be replaced.

Lay butyl rope with ø 3 mm (sourcing reference: BMW Parts Department) onto the original butyl rope.

Replacement:

Remove residual butyl at the door and clean the adhesive area.

Air drying time: 1 minute

IMPORTANT: Bonding surface must be dry and free of dust and grease.
Once it has been cleaned, do not touch the adhesive area with bare hands.

Lay 6 mm dia. butyl rope (sourcing reference: BMW Parts Department) in specified adhesive area onto the sound insulation.

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

Fig 3: Identifying Sound Insulation And Butyl Rope

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: A mark (2) is provided all round on the sound insulation (1).

Butyl rope (3) rests on or inside the marking (2).

Heat butyl rope (3) (hot air blower) and press sound insulation (1) on firmly 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

Fig 4: Identifying Sound Insulation Mark

Courtesy of BMW OF NORTH AMERICA, INC.