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18 10 031 Replacing rear muffler (N52)

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2008 BMW 328xi, 2008 BMW 328i, 2008 BMW 323i, 2007 BMW 328xi, and 2007 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

WARNING: Scalding hazard! 
Only perform these tasks on an engine that has cooled down.

Support rear muffler with special tool 31 2 220.

Fig 1: Identifying Special Tool (31 2 220)
G04725872Courtesy of BMW OF NORTH AMERICA, INC.
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 (2).
Carry over cutting line to faulty rear muffler (2) and mark out.
Fig 2: Identifying Rear Muffler And Mark Out
G04725873Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Special Tool (00 2 210)
G04725874Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten nut.

Tightening torque 18 20 4AZ.

Fig 4: Identifying Rear Muffler Bracket Nut
G04725869Courtesy of BMW OF NORTH AMERICA, INC.

Release screw on right bracket.

Tightening torque 18 20 5AZ. Refer to 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 5: Identifying Rear Muffler To Body Screw
G04725870Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

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

Centre clamp and tighten down.

Tightening torque 18 20 8AZ. Refer to 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 6: Identifying Muffler Clamp
G04725877Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Check exhaust system for leaks.
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