Removing and installing complete exhaust system (S55 engine)

This repair work may only be carried out on an exhaust system which has cooled down.

Removal of the exhaust system must be carried out with the assistance of a second person.

Necessary preliminary work: 

• Remove rear UNDERBODY PROTECTION .
• Use a suitable jack to support and secure the exhaust system against falling.

Removal: 

Slacken nut (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove reinforcement plate (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Slacken nut (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect the plug connection (1).

Slacken nut (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect the plug connection (1).

Slacken nut (2).

Lower and remove exhaust system with assistance of a second person.

Courtesy of BMW OF NORTH AMERICA, INC.

Preparation for installation: 

Check rubber mount for damage, replace if necessary.

Installation: 

Replace the gaskets (1).

Install exhaust system and connect to catalytic converter with the assistance of a second person.

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten nut (1).

Tightening torque 18 31 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten nut (2).

Tightening torque 18 20 4AZ .

Tighten screw (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten nut (1).

Tightening torque 18 20 4AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down screws (1).

Tightening torque 18 20 2AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Install reinforcement plate (2).

Tighten down screws (1).

Tightening torque 33 32 11AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten nut (2).

Tightening torque 18 20 3AZ .

Attach plug connection (1), must audibly engage.

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten nut (2).

Tightening torque 18 20 3AZ .

Attach plug connection (1), must audibly engage.

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: 

• Install rear UNDERBODY PROTECTION .
• Check exhaust system for leaks.