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18 12 031 Replacing rear silencer (N63 Hybrid)

WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

WARNING: High-voltage system - danger to life
WARNING: The following points must be strictly observed prior to starting work: 
WARNING: Risk of burns! 
Only perform these tasks after exhaust system has cooled down.

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

Fig 1: Supporting Rear Silencer With Special Tool (31 2 220) And Suitable Universal Lifter
G08485087Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: If the separation point is not marked by a punch mark on the pipe, determine the separation point by means of the pipe length on the new rear silencer.
Carry over separation point to faulty rear silencer (3) and mark out.
Secure rear silencer against falling off.
Cut through exhaust pipes at marked point with a suitable tool.
Fig 2: Identifying Centre Silencer
G08577050Courtesy of BMW OF NORTH AMERICA, INC.

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

Release screw (1).

Tightening torque 18 20 3AZ .

Fig 3: Identifying Exhaust System Mounting Screws
G06179235Courtesy of BMW OF NORTH AMERICA, INC.

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

Unscrew nuts (1).

Tightening torque 18 20 4AZ .

Detach hose (2) from vacuum unit and release at clamp (3).

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

Fig 4: Identifying Hose, Tube And Screws
G06179236Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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

Centre clamp and tighten down.

Tightening torque 18 31 5AZ .

The procedure is identical on both sides.

Fig 5: Identifying Centre Silencer And Clamps
G04794086Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Align both exhaust tailpipes (1) of rear silencer in each case centrally to recesses in rear apron.

Fig 6: Identifying Tail Pipes Of Rear Muffler
G06179237Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Check rubber mount for damage.
Replace damaged rubber mount.
Check exhaust system for leaks.
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