18 12 031 Replacing rear silencer (N63)

Special tools required: 

• 31 2 220

Necessary preliminary tasks: 

• E71 only: 

  Remove rear bumper panel.

Support rear silencer with special tool 31 2 220 and a suitable universal lifter.

Fig 1: Supporting Rear Silencer Using Special Tool

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Fig 2: Identifying Exhaust Pipe Marks

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Picture shows the left side, the procedure for the right side is identical.

Release screw (1).

Tightening torque: 18 20 3AZ .

Fig 3: Identifying Screw

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Picture shows the left side, the procedure for the right side is identical.

Unscrew nuts (1).

Tightening torque: 18 20 4AZ .

Detach hose (2) from vacuum unit and release at clamp (3).

Lower and remove rear silencer with assistance of a second person.

Fig 4: Identifying Hose, Clamp And Nuts

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Installation note: 

Install, adjust new rear silencer and connect with hose clamp.

Center clamp and tighten down.

Tightening torque: 18 31 5AZ .

The procedure is identical on both sides.

Fig 5: Identifying Center Clamp

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Installation note: 

Align both exhaust tailpipes (1) of rear silencer in each case centrally to recesses in rear apron.

Fig 6: Identifying Exhaust Tail Pipes

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