18 32 060 Removing And Installing/Replacing Catalytic Exhaust Gas Converter For Cylinders 4-6 (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. 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.

Necessary preliminary tasks:

Remove catalytic converter, cylinders 1-3 . See 18 32 050 REMOVING AND INSTALLING/REPLACING CATALYTIC EXHAUST GAS CONVERTER FOR CYLINDERS 1-3 (N54) .

NOTE: The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed. Remove control sensor, cylinders 4 to 6 . Remove monitor sensor, cylinders 4 to 6 . See EMISSION CONTROL OXYGEN SENSOR .

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. See 18 31 3AZ .

Fig 1: Identifying Catalytic Converter

Courtesy of BMW OF NORTH AMERICA, INC.

E90/91/92/93 note on installation:

Secure catalytic converter in installation position with special tool 18 0 110.

Fig 2: Identifying Special Tool 18 0 110

Courtesy of BMW OF NORTH AMERICA, INC.