18 12 044 Replacing front muffler (N52, N52K)

Special tools required: 

• 00 2 210
• 31 2 220

Necessary preliminary tasks: 

• E91/ 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)

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

Fig 2: Rear Muffler

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

Fig 3: Special Tool (00 2 210)

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Unscrew nuts.

Installation: 

Replace self-locking nuts.

Replace seal.

For tightening torque refer to 18 20 1AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 4: Exhaust Pipe Self-Locking Nuts

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Release bolt and remove bracket (1).

For tightening torque refer to 18 20 2AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 5: Bracket And Mounting Bolt

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Unfasten screw connection.

Installation: 

For tightening torque refer to 18 20 3AZ in 18 20 EXHAUST SYSTEM SUSPENSION .

Fig 6: Bracket Nut

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

Lower front muffler and remove.

Fig 7: Reinforcement Plate

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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

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