18 12 031 Replacing rear silencer (N55)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
- 31 2 220
WARNING:
Risk of burning!
Only perform this repair work after engine has cooled down.
Danger of injury!
Removal of the exhaust system must be carried out with the assistance of a second person.
Only perform this repair work after engine has cooled down.
Danger of injury!
Removal of the exhaust system must be carried out with the assistance of a second person.
Support rear silencer with special tool 31 2 220 or with a suitable jack and secure against falling out.
NOTE:
If the separation point line is not marked by a punch mark in 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 and mark.
Secure rear silencer against falling off.
Cut through exhaust pipes at marked point with a suitable tool.
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.
Release nut and remove holder (1).
Tightening torque: 18 20 3AZ .
Release nuts (1) and remove holder.
Tightening torque: 18 31 3AZ .
Pull off vacuum line (1).
Unscrew nuts (1).
Tightening torque: 18 31 3AZ .
Lower and remove the rear silencer carefully with assistance of a second person.
Installation note:
Adjust rear silencer and connect with clamp.
Center clamp and tighten down.
Tightening torque: 18 31 5AZ .
Installation note:
Check rubber mount for damage.
If necessary, replace damaged rubber mounts.
Check exhaust system for leak tightness.