18 12 090 Replace front intake pipe (N55)

WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2017 BMW 550i GT xDrive, 2017 BMW 535i GT xDrive, 2017 BMW 535i GT, 2016 BMW 550i GT xDrive, and 2016 BMW 535i GT xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

31 2 220

WARNING: Risk of burning!
This repair work may only be carried out on an exhaust system which has cooled down.

Support front silencer with special tool 31 2 220 and a suitable universal lifter.

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

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: If the separation point is not marked by a punch mark in the pipe, determine the separation point by means of the pipe length on the new front pipe.
Carry over separation point to defective front pipe and mark.
Secure front pipe against falling off.
Cut through exhaust pipes at marked point with a suitable tool.

Fig 2: Identifying Cutting Points On Pipes

Courtesy of BMW OF NORTH AMERICA, INC.

Release clamp (1).

Tightening torque 18 31 1AZ .

Fig 3: Identifying Clamp

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Install front pipe to fit and connect with clamps.

Center clamps and tighten down.

Tightening torque 18 31 8AZ .

Modify vibration absorber.

Fig 4: Installing Front Pipe With Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check exhaust system for leak tightness.