18 12 031 Replacing Rear Muffler (N54)

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 210 . See 00 2 210 EXHAUST PIPE CUTTER .
31 2 220 . See FRONT AXLE - SPECIAL TOOLS .

WARNING: Scalding hazard!
These tasks should only be carried out on an exhaust system that has cooled down.

Support exhaust system with special tool 31 2 220 and universal lifter. See Fig 1.

Fig 1: Supporting Exhaust System Using Special Tool 31 2 220

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NOTE: If the cutting line is not marked by a punch mark in the pipe, determine the cutting line by means of the pipe length on the new rear muffler.
Carry over cutting line to faulty rear muffler and mark.

Fig 2: Identifying Cutting Lines On Rear Muffler

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Cut exhaust pipe at marked point with special tool 00 2 210 and deburr with a standard tool.

Fig 3: Cutting Exhaust Pipe Using Special Tool 00 2 210

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Secure exhaust system against falling off.

Release bolt and remove bracket (1).

Tightening torque. See 18 30 2AZ in EXHAUST SYSTEM - TIGHTENING TORQUES (N54) .

NOTE: Texts refer to and illustrations show the right side. The procedure is identical for the left side.

Fig 4: Locating Bolt And Bracket

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Detach pressure hose (1).

Release screws and remove holder (2). Tightening torque 18 20 4AZ 18 20 EXHAUST SYSTEM SUSPENSION .

NOTE: Texts refer to and illustrations show the right side. The procedure is identical for the left side.
Lower and remove rear muffler with assistance of a second person.

Fig 5: Identifying Pressure Hose And Holder

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Installation:

Connect center muffler to rear muffler by means of clamps and align.

Center clamps and tighten down.

Fig 6: Connecting Center Muffler To Rear Muffler Using Clamp

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Installation:

Align both tail pipes (1) of rear muffler in each case centrally to openings in rear apron.

Fig 7: Identifying Tail Pipes Of Rear Muffler

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NOTE: Check rubber mount for damage, replace if necessary.
Check exhaust system for leaks.