18 10 034 Replacing both rear silencers (N54, N54T)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

31 2 220

WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.

Necessary preliminary tasks:

Remove the REINFORCEMENT PLATE from the rear axle.
Remove TENSION STRUTS on left and right from rear axle.

Support rear silencer with special tool 31 2 220.

Fig 1: Supporting Exhaust System With Special Tool (31 2 220)

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NOTE: If the separation point is not marked by a punch mark in the pipe, determine the separation point by means of the pipe length on the new rear silencer.

Carry over separation point to faulty rear silencer and mark.

Cut through exhaust pipes at marked point with a suitable tool.

Fig 2: Identifying Exhaust Pipes Cutting Marked Point

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

Release screw (1) on rubber mount.

Tightening torque 18 31 4AZ .

Fig 3: Identifying Screw On Rubber Mount

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Slacken nut (1).

Tightening torque 18 31 5AZ .

Fig 4: Identifying Slacken Nut

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Pull off vacuum hose (1).

Slacken nut (2).

Tightening torque 18 31 5AZ .

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

Fig 5: Identifying Vacuum Hose

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Installation note:

Connect front pipes to rear silencers by means of clamps and align.

Center clamps and tighten down.

Tightening torque 18 20 3AZ .

Fig 6: Locating Clamp Bolts

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NOTE: Check exhaust system for leaks.
Check rubber mount for damage.
If necessary, replace damaged rubber mounts.