Brakes - Popping Noise When Brake Pedal is Pressed

Date: June 26, 2008

Order No.: P-B-43.10/03a

Supersedes: P-B-43.10/03 dated January 26, 2007

Group: 43

Revision History

Revision Date Purpose

a 6/26/08 Repair Procedure, Parts and Warranty Information Updated

- 1/26/07 Initial issue

SUBJECT:
Model 211.022, Model Year 2007, Up to VIN B171224

Popping Noise When Brake Pedal is Quickly Depressed

If you receive customer reports in the above model vehicle of a popping noise when quickly depressing the brake pedal, perform the following:

1. Replace the master cylinder with a revised part. Refer to WIS document AR42.10-P-0300T.





2. Check the object number and Q-level of the brake booster (Figure 1, A).

3. If the following object numbers listed below appear on the label, then the brake booster must be replaced with a revised part. Refer to WIS document AR43.10-P-0350T.

^ A211 430 03 30 Q1

^ A211 430 03 30 Q2

^ A211 430 04 30 Q1

^ A211 430 04 30 Q2

Note:
The noise does not impair the braking power and is only an accompanying acoustic effect.

Note:
The Adaptive Braking System (ABR) has a high brake boost level which is achieved by a high vacuum level and the large cross section of the control valve in the brake booster. As a result of this, combined with component tolerances, an abrupt "pop" noise may be produced when the brake pedal is quickly depressed.





Parts Information

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on June 26, 2008. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.





In Case of Warranty, use the table.