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18 12 030 Replacing final muffler

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Special tools required: 

WARNING: Scalding hazard!
These tasks should only be carried out on an exhaust system that has cooled down!

Determining cutting point: 

Carry over length of new rear muffler to installed rear muffler. Mark out cutting point.

Fig 1: Identifying Cutting Point Dimension
G03123934Courtesy of BMW OF NORTH AMERICA, INC.

Cut exhaust pipes with special tool 00 2 210 at marked points and deburr.

Fig 2: Cutting Exhaust Pipes Using Special Tool 00 2 210
G03123935Courtesy of BMW OF NORTH AMERICA, INC.

If fitted, detach vacuum hose (1) from vacuum unit (2).

Fig 3: Disconnecting Vacuum Hose From Vacuum Unit
G03123936Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts on rubber mount of rear muffler on left and right and remove rear muffler.

Installation: 

Install rubber mounts for suspension from body, vibration damper and both chrome exhaust pipes on new rear muffler.

Fig 4: Identifying Release Nuts On Rubber Mount Of Rear Muffler Left & Right
G03123937Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Connect new rear muffler and center muffler by means of clamping sleeves

Cutting point is in middle of clamping sleeve.

Align exhaust system and clamping sleeves in such a way that there is sufficient spacing to adjoining components.

Fig 5: Connecting Rear Muffler & Center Muffler Using Clamping Sleeves
G03123938Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Check position of end pipes to body cutout.

Tighten down screws of clamping sleeves.

Fig 6: Identifying Position Of End Pipes To Body Cutout
G03123939Courtesy of BMW OF NORTH AMERICA, INC.