ECE version:

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect plug connections on both monitor sensors.

Release screw connection for temperature sensor.

Release screw connections (1) between exhaust manifold and catalytic converter.

Fig 1: Locating Screws Between Exhaust Manifold And Catalytic Converter

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check gaskets, replace if necessary.

Replace self-locking nuts.

Coat threads with -CRC- copper paste.

Release screw connections (1) between center muffler and rear mufflers.

Fig 2: Removing Screws Between Center Muffler And Rear Mufflers

Courtesy of BMW OF NORTH AMERICA, INC.

Remove catalytic converter towards bottom.

Installation:

Check gaskets, replace if necessary.

Replace self-locking nuts.

Coat threads with -CRC- copper paste .

Release screw connections between catalytic converter and center muffler.

Fig 3: Removing Screws Between Catalytic Converter And Center Muffler

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check gaskets, replace if necessary.

Coat threads with -CRC- copper paste .

Detach center muffler from catalytic converter.

If necessary, replace center muffler.