Brakes - Front Brake Squeal/Squeak
46 S4 and S5 squealing from front brakes (PR-1LJ)
46 13 30
2027636/5
March 13, 2013
Supersedes Technical Service Bulletin Group 46 number 12-22 dated June 5, 2012 for reasons listed below.
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Vehicle Information
Condition
Brakes squeak or squeal when braking with light to moderate force on vehicles produced before June 20, 2011 (calendar week 25 of 2011).
Technical Background
If any of the conditions occur, this TSB does not apply.
^ Foreign bodies between brake disc and brake pad, such as small stones, grit, or sand.
^ Un-ground or corroded friction materials.
^ Brake discs or brake pads are close to their wear limit. (Front brake disc wear limit: 28mm. Front brake pads wear limit with backing plate and
dampening sheet: 7mm.)
^ Metallic deposits from disc material in brake pad (Figure 1).
^ Deposits in brake pad.
Production Solution
From week 25/2011 (June 20, 2011) brake discs, brake carriers, and brake pads with noise insulation.
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Service
1. Confirm the customer's vehicle was produced before June 20, 2011 and has PR-1LJ (29.5MM discs).
^ If it was produced after this date, this TSB does not apply to the vehicle.
^ If it does not have PR-1LJ, this TSB does not apply to the vehicle.
^ If it has PR-1LJ with 30mm front discs (see ETKA), this TSB does not apply to this vehicle.
^ If it has PR-1ZT, this TSB has been performed and should not be performed again.
2. Further information can be obtained from ETKA (Figures 2, 3, & 4).
3. Install parts kit with part number 8K0698998. The kit includes the following components:
^ 1 set of brake pads with wear indicator for disc brakes
^ 2 front brake discs
^ 2 brake carriers
^ 4 hexagonal collar bolts
^ 2 hexagonal countersunk screws
Tip:
New brake pads must be securely glued to the calipers.
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4. Apply a thin coat of anti-seize (G 052560A2) lubricant to the guide pins of the new caliper carrier prior to installing the new brake pads (Figure
5). Only apply this lubricant to the section of the guide pins that will be contacted by the brake pads.
5. Follow all instructions in the attached TSB, 2011732 00 Software Management (SVM), operating instructions, to update the vehicles front brake
PR code data using SVM action code listed in the table below. Use Audi Flashing > Software Version Management (SVM) > SVM - Direct in
put:
SVM code for vehicle conversion.
6. Road test the vehicle to seat the breaks and to verify that the noise has been eliminated.
Tip:
The change is necessary to ensure correct parts are installed during future brake service.
Warranty
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There must be an original customer complaint of the specified symptom on the repair order for this Technical Service Bulletin to apply. Adding on
this procedure is not permitted.
All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to
review or audit by Audi Warranty.
Required Parts and Tools
Note:
In the event of a parts request, all parts included in the repair should be sent to the WPRC.
Additional Information
The following Technical Service Bulletin(s) will be necessary to complete this procedure:
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^ TSB 2011732 00 Software Management (SVM), operating instructions.
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
manuals for the latest information.
