18 12 044 Replacing front muffler (N52, N52K)

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:

00 2 210
31 2 220

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

Support front muffler with special tool 31 2 220.

Fig 1: Identifying Special Tool (31 2 220)

G04725872

Courtesy 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 front muffler (1).
Carry over cutting line to faulty front muffler (1) and mark out.

Fig 2: Identifying Exhaust System

G04725873

Courtesy 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)

G04725874

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nuts.

Installation:

Replace self-locking nuts.

Replace seal.

Tightening torque 18 20 1AZ. Refer to 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 4: Identifying Exhaust Manifold Self-Locking Nuts

G04725866

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolt and remove bracket (1).

Tightening torque 18 20 2AZ. Refer to 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 5: Identifying Muffler Bracket And Bolt

G04725882

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten screw connection.

Installation:

Tightening torque 18 20 3AZ. Refer to 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 6: Identifying Bracket To Rear Differential Screw

G04725868

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolts along line and remove reinforcement plate (1).

Lower front muffler and remove.

Fig 7: Identifying Reinforcement Plate

G04725871

Courtesy 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 8: Identifying Muffler Clamp

G04725877

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check exhaust system for leaks.