S-Type (X200) V8-4.2L SC (2003)
Technical Service Bulletin # S206-10
Date: 060101
Brakes - Vibration When Braking (Brembo Brakes)
S206-10
DATE
01/06
S-TYPE
MODEL
2003-05 MY
S-TYPE R
VIN
M44998-N52047
Vibration When Braking -
Brembo Brakes Disc Thickness Variation -
Diagnosis/Repair
Issue:
A customer may report a concern of, or a recurrence of vibration/shudder while braking, despite an earlier occurrence of the problem being resolved with
replacement brake discs and brake linings.
Cause:
Vibration/shudder while braking is not necessarily caused by brake disc run-out (also referred to as warped discs, or out-of-roundness of the discs). It can
also be caused by low levels of disc thickness variation (DIV) being present around the contact area of the brake disc. DIV is caused when a vehicle with
moderate levels of brake disc run-out, drives many miles with very little braking activity, such as on a highway or freeway. The installation angle of the
replacement discs and the rubbing of the brake pad on the high areas of the rotating brake disc when the brakes are not applied, cause the DTV. Refer to
illustration 1.