18 10 031 Replace the rear silencer (N47 D20 O 1 with SCR)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.
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.
Necessary preliminary tasks:
- Support rear silencer with a suitable jack and secure against falling down.
Release bolts along line (1).
Remove cover from below rear silencer.
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 31 3AZ .
Unfasten nut.
Tightening torque 18 20 4AZ .
Slacken nut (1).
Tightening torque 18 20 4AZ .
Lower and remove the rear silencer carefully with assistance of a second person.
Installation note:
Adjust rear silencer and connect with clamp.
Align clamping sleeves so that:
- Nuts point downwards.
- Cutting line is in middle of clamping sleeve.
- There is sufficient spacing to adjoining components.
Center clamp and tighten down.
Tightening torque 18 31 3AZ .
Installation note:
Check rubber mount for damage, replace if necessary.
Check exhaust system for leak tightness.