18 32 050 Removing and installing/replacing catalytic exhaust-gas converter for cylinders 1-3 (N54)
WARNING: This page is about a different car, the 2010 BMW 535xi, 2009 BMW 535xi, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Scalding hazard!
Only perform these tasks after exhaust system has cooled down.
Only perform these tasks after exhaust system has cooled down.
Necessary preliminary tasks:
- Remove exhaust system . .
- Remove underbody protection . See 51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION and 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION .
- Remove cable holder on side of transmission for control sensor/monitor sensor
- In all-wheel-drive vehicles: Remove right bearing block
. See 31 53 040 REMOVING AND INSTALLING/REPLACING RIGHT OUTPUT SHAFT BEARING BLOCK
.NOTE: The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.
Remove control sensor, cylinders 1 to 3 . See 78 EMISSION CONTROL, OXYGEN SENSOR .
Remove monitor sensor, cylinders 1 to 3 . See 78 EMISSION CONTROL, OXYGEN SENSOR .
Unscrew nuts.
Tightening torque 18 20 2AZ.
Release screws.
Remove holder (1).
Unfasten clip. In so doing, secure catalytic converter (1) against falling out.
Remove catalytic converter (1).
Installation:
Clean sealing face and replace seal.
Tightening torque 18 00 3AZ.