Necessary preliminary tasks

• Remove rear UNDERBODY PROTECTION
• F03 Only: 

  Remove underbody protection on left and right

Support exhaust system with special tool 31 2 220.

Fig 1: Supporting Exhaust System Using Special Tool 31 2 220

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Unscrew nuts (1).

Tightening torque 18 31 1AZ .

Replace self-locking nuts.

Replace seals.

Fig 2: Identifying Nuts Of Exhaust System

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Unscrew nuts (1).

Tightening torque 18 20 1AZ .

Fig 3: Identifying Nuts

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Release screws (1).

Tightening torque 18 20 6AZ .

Only when independent heating is fitted: release screw (2) on metering pump.

Tightening torque 18 20 7AZ .

Release screws (3) on underbody panels.

Remove reinforcement plate (4).

Fig 4: Identifying Screw On Metering Pump, Screw On Underbody Panels And Reinforcement Plate

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Slacken nut (1).

Tightening torque 18 20 4AZ .

Fig 5: Identifying Exhaust System Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Unscrew nuts (1).

Tightening torque 18 20 5AZ .

Fig 6: Identifying Unscrew Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Slacken nut (1).

Tightening torque 18 20 5AZ .

Detach hose (2) on vacuum unit.

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

Fig 7: Identifying Nut And Hose On Vacuum Unit

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Installation:

Check rubber mount for damage.

If necessary, replace damaged rubber mounts.

Check exhaust system for leaks.