18 12 031 Replacing left or right rear silencer (N55 Hybrid)

Special tools required: 

• 31 2 220

The following points must be strictly observed prior to starting work: 

• Observe SAFETY INFORMATION for handling hybrid cars

Support rear silencer with special tool 31 2 220 and a suitable universal lifter.

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

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Carry over separation point to faulty rear silencer and mark.

Secure rear silencer against falling off.

Cut through exhaust pipes at marked point with a suitable tool.

Fig 2: Identifying Front Intake Pipe Mark Point

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Slacken nut (1).

Tightening torque 18 31 3AZ .

Fig 3: Identifying Exhaust System Nut

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Slacken nut (1).

Tightening torque 18 31 3AZ .

Fig 4: Identifying Rear Silencer Nut

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Picture shows the left side, the procedure for the right side is identical.

Spray bolt (1) and rubber mount with lubricant 5.2 .

Release screw (1).

Lower and remove rear silencer with assistance of a second person.

Installation note: 

Risk of damage to screw (1) and retaining plate thread.

Fig 5: Identifying Screw And Retaining Plate Thread

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Observe screwing sequence  .

1. Firstly apply nut to body at rear.
2. Then join bolt (1) exactly and secure. If necessary support rear silencer using a suitable jack.

   Tightening torque 18 31 3AZ .

.

Installation note: 

Install, adjust new rear silencer and connect with hose clamp.

Center clamp and tighten down.

Tightening torque 18 31 7AZ .

The procedure is identical on both sides.

Fig 6: Identifying Center Clamps

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