18 12 044 Replacing front muffler (N51)

Special tools required: 

• 00 2 210
• 31 2 220

Necessary preliminary tasks: 

• E92/ E93 only: Remove Tension Strut on rear axle.

Support front muffler with special tool 31 2 220.

Fig 1: Special Tool (31 2 220)

Courtesy of BMW OF NORTH AMERICA, INC.

Carry over cutting line to faulty front silencer (3) and mark out.

Fig 2: Identifying Rear Muffler Line Cutting Position

Courtesy of BMW OF NORTH AMERICA, INC.

Cut exhaust pipes at marked points with special tool 00 2 210 and deburr.

Fig 3: Special Tool (00 2 210)

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolt and remove bracket (1).

Tightening torque: see 2AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 4: Exhaust Pipe Self-Locking Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolt and remove bracket (1).

Tightening torque: see 2AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 5: Bracket And Mounting Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten screw connection.

Installation: 

Tightening torque: see 3AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 6: Bracket Nut

Courtesy of BMW OF NORTH AMERICA, INC.

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

Lower front muffler and remove.

Fig 7: Reinforcement Plate

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.

For tightening torque refer to 18 20 8AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 8: Muffler Connection Clamp

Courtesy of BMW OF NORTH AMERICA, INC.