Drivetrain - Howling Noise from Rear Axle Area
SI B 33 01 07Rear Axle
October 2007
Technical Service
SUBJECT
E60 M5 Howling Noise from Rear Axle Area
MODEL
E60 M5 from 09/05 up to 01/06 production
SITUATION
Customer may complain of a howling type of noise coming from the rear axle area, mostly in the speed ranges of 40-50 mph and above 60 mph.
CAUSE
Vibration damping characteristic of front differential bushings.
CORRECTION
On a customer complaint basis only, inspect front differential bushings and if found to be of an original design type, replace with improved parts (P/N 33 31 2 283 019). For bushings replacement procedure, refer to RA 33 17 004 found in TIS.
The original design of front differential bushings are easily recognized by orange-colored plastic material with a round aluminum insert (1).
The new style front differential bushings (P/N 33 31 2 283 019) are black (1) with cross-shaped aluminum center insert.
PARTS INFORMATION
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
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