18 32 085 Replace both exhaust pipes with catalytic converters (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.

Support front silencer with special tool 31 2 220. And secure against dropping.

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 front silencer.

Carry over separation point to faulty front 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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Unscrew nuts (1).

Tightening torque 18 31 1AZ .

Replace self-locking nuts.

Replace gaskets.

Fig 3: Identifying Nuts

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Release bolt and remove holder (1).

Tightening torque 18 31 2AZ .

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

Fig 4: Identifying Bracket With Bolt

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Installation note:

Connect front silencer to rear silencer by means of clamp and align.

Center clamp and tighten down.

Tightening torque 18 20 3AZ .

Fig 5: Locating Clamp Bolts

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NOTE: Check exhaust system for leaks.