Suspension - Front Suspension Knocking Noises

SI B 37 01 07
Special Suspension Systems

October 2008
Technical Service

This Service Information bulletin supersedes SI B37 01 07 dated November 2007.

[NEW] designates changes to this revision

SUBJECT
Knocking Noise from Front Suspension

MODEL
E70 (X5) with Sport Package Option Code ZSP

SITUATION
The customer may report a knocking or clunking noise coming from the front end of the vehicle while driving over bumpy roads or when making abrupt left or right turns.

CAUSE
The noise may be caused by a faulty spring accumulator for the front axle sway bar.

CORRECTION
In order to determine the source of the noise, remove the fuse for the Dynamic Drive (ARS) and drive the vehicle.

[NEW] If the noise is still present, please work through the related diagnostic path as described in Repair Instruction, RA 37 90 ... "Troubleshooting on Dynamic Drive (ARS)".

[NEW] If removing the fuse for the ARS eliminates the noise, then replace the stabilizer bar as per Repair Instruction, RA 37 11 010 "Removing and installing/replacing front active stabilizer".





Replacement stabilizers no longer utilize an external accumulator (1).

Whenever a stabilizer with an external accumulator (1) is replaced, then the ARS module must be recoded.

The necessary coding for the ARS module is available in Progman under Retrofits by selecting "Stabilizer". After completing the Progman session, perform the Dynamic Drive Start Up Test, using DISPlus or GT-1.





[NEW] PARTS INFORMATION





WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty or the Certified Pre-Owned Program.

Please refer to the latest KSD for all applicable labor operations and allowances.

If the appropriate labor operation is not contained in KSD, then a work time labor operation should be used.





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