Vibration When Braking: Diagnosing And Repairing (SI B34 01 14)

VIBRATION WHEN BRAKING: DIAGNOSING AND REPAIRING

SERVICE CAMPAIGN BULLETIN

SERVICE INFORMATION

What's New  (Specific text highlighted):

• Cause
• Procedure
• Correction
• Attachment B34 01 14_Troubletree_4

THIS REPAIR IS MOBILE FRIENDLY

MODEL

All With Standard Brake Disc/Rotors (Non-Drilled or Non-Ceramic Brake Disc/Rotors)

SITUATION

Pulsation of the brake pedal when applying the brakes.

CAUSE

Excessive brake disc thickness variation.

• Brake disc thickness variation is the result of lateral runout in the face of the brake disc
• A brake disc with lateral runout while driving will slightly contact the brake pad once per revolution resulting in a thin spot on the brake disc
• This constant contact will eventually cause the brake disc to wear unevenly
• Painted and powder-coated wheels can create an uneven material thickness that when stacked against the hub and face of the rotor will eventually lead to brake vibrations caused by rotor runout

PROCEDURE

Refer to the attached troubleshooting tree. B34 01 14_Troubletree_4.

CORRECTION

As determined by the results of following the B34 01 14_Troubletree_4, the brake discs (front, rear or both as applicable) are to be:

1. Resurfaced using a BMW approved* "on-car" brake lathe (Non-Drilled or Non-Ceramic Brake Disc), refer to SI B34 10 16 for additional information on brake rotor resurfacing.

   Or

2. Replaced

   Including: *  Replacement of the corresponding brake pads and wear sensor(s).

In the event of a repeat case, refer to SI B04 10 17  , and Attachment SI B34 01 14  Troubletree 4. Repair as necessary

For the list of BMW approved "on-car" brake lathes, refer to BMW Equipment Program (www.bmwcentersolutions.com)

PARTS INFORMATION

Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK or AIR which considers specific equipment and/or options.

Part Number	Description	Quantity
Refer to ETK	Front brake pads (Set)	1
Refer to ETK	Rear brake pads (Set)	1
Refer to ETK	Brake pad paste	1 per axle

Also refer to ETK (EPC) and the repair instructions for information about onetime use fasteners, other screws/bolts, gaskets and seals that must also be replaced while performing this repair.

CLAIM INFORMATION

Brake discs that can be resurfaced for excessive run-out are covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.

Front Axle alone 

Defect Code:	3411005700	Brake disc, front - Vibration
Labor Operation:	Labor Allowance:	Description:
34 11 000	Refer to KSD2	Removing and installing or replacing brake pads of both front  discs brakes (Main work)
Or:
34 11 505	Refer to KSD2	Removing and installing or replacing brake pads of both front  disc brakes (Plus work)
Or:
34 11 510	Refer to KSD2	Removing and installing or replacing brake pads of both front  disc brakes (Associated work - Wheels removed)
And:
34 11 667	Refer to KSD2	Fine grind both sides of both front  brake discs (Brake caliper removed)
And, as needed:
34 99 000	2 FRU	Associated work: Work time to perform an additional finish cut (one or both front sides)  when required.
Or:
34 11 613	Refer to KSD2	Removing and installing or replacing front  brake discs (Brake pads removed)
Or:
34 11 612	Refer to KSD2	Removing and installing or replacing front  brake discs (Brake caliper removed)

Or, for the:

Rear Axle 

Defect Code:	3421005700	Brake disc, rear - Vibration
Labor Operation:	Labor Allowance:	Description:
34 21 200	Refer to KSD2	Removing and installing or replacing brake pads of both rear  disc brakes (Main work)
Or:
34 21 739	Refer to KSD2	Removing and installing or replacing brake pads of both rear  disc brakes (Plus work)
Or:
34 21 740	Refer to KSD2	Removing and installing or replacing brake pads of both rear  disc brakes (Associated work - Wheels removed)
And:
34 21 947	Refer to KSD2	Fine grind both sides of both rear  brake discs (calipers removed)
And, as needed:
34 99 000	2 FRU	Associated work: Work time to perform an additional finish cut (one or both rear sides)  when required.
Or:
34 21 932	Refer to KSD2	Removing and installing or replacing rear  brake discs (Brake pads removed)
Or:
34 21 931	Refer to KSD2	Removing and installing or replacing rear  brake discs (Brake caliper removed)

Or, for the:

Front and Rear Axles together 

Defect Code:	3411005700	Brake disc, front - Vibration
Labor Operation:	Labor Allowance:	Description:
34 11 010	Refer to KSD2	Replacing brake pads of front and rear  disc brakes (Main work)
Or:
34 11 514	Refer to KSD2	Replacing brake pads of front and rear  disc brakes (Plus work)
Or:
34 11 515	Refer to KSD2	Replacing brake pads of front and rear  disc brakes (Associated work - Wheels removed)
And:
34 11 667	Refer to KSD2	Fine grind both sides of both front  brake discs (calipers removed)
And, as needed:
34 99 000	2 FRU	Associated work: Work time to perform an additional finish cut (one or both front sides)  when required.
Or:
34 11 613	Refer to KSD2	Removing and installing or replacing front  brake discs (Brake pads removed)
Or:
34 11 612	Refer to KSD2	Removing and installing or replacing front  brake discs (Brake caliper removed)
And:
34 21 947	Refer to KSD2	Fine grind both sides of both rear  brake discs (calipers removed)
And, as needed:
34 99 000	2 FRU	Associated work: Work time to perform an additional finish cut (one or both rear sides)  when required.
Or:
34 21 932	Refer to KSD2	Removing and installing or replacing rear  brake discs (Brake pads removed)
Or:
34 21 931	Refer to KSD2	Removing and installing or replacing rear  brake discs (Brake caliper removed)

If you are using a Main labor code for another repair, use the Plus code or associated labor operation as applicable.

Refer to KSD2 for the corresponding flat rate unit (FRU) allowances.

Work time labor operation code 34 99 000 is not considered a Main labor operation. Also, since the "work time" FRU allowance to be claimed is specified, a separate punch time is not required.

When defect code 34 11 00 57 00 is used for repairing the front and brakes together, when applicable, claim labor operation 34 99 000 one time for either 2 or 4 FRU that applies to the scope of the repair performed.

The flat rate labor operations for replacing the brake pads (front, rear or both) includes replacing the corresponding brake pads, wear sensor(s) and measuring the minimum brake disc thickness.

FEEDBACK REGARDING THIS BULLETIN

Technical Feedback	To submit feedback for the technical topic of this bulletin: Submit your feedback in the rating box at the top of this bulletin
Warranty Feedback	To submit feedback for the CLAIMS section of this bulletin: Submit an IDS ticket to the Warranty Department, or use the chat available in the Warranty Documentation Portal
Parts Feedback	To submit feedback for the PARTS section of this bulletin: Submit an IDS ticket to the Parts Department

Supporting Materials

picture_as_pdf B34 01 14_Troubletree_4.pdf 

picture_as_pdf Attachment_B341016_Categorization.pdf