11 62 140 Removing and installing/replacing both exhaust manifolds with catalytic converter (M54 X3): Notes

Necessary preliminary tasks:

Remove HVAC microfilter compartment.
Secure engine in installation position. Refer to SECURING ENGINE WITH SPECIAL TOOL IN INSTALLATION POSITION (M54) .
Remove exhaust system. Refer to 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (M54) .
Remove oxygen sensors. Refer to 11 78 511 REPLACING OXYGEN CONTROL SENSOR (CYLINDERS 1-3) , 11 78 512 REPLACING OXYGEN CONTROL SENSOR (CYLINDERS 4-6) , 11 78 611 REPLACING OXYGEN MONITOR SENSOR (CYLINDERS 1-3) and 11 78 612 REPLACING OXYGEN MONITOR SENSOR (CYLINDERS 4-6) .
Lower front axle.

NOTE: It is not necessary to perform a wheel alignment on the front axle when the front axle is lowered.