NHTSA ID Number: 10057534
Manufacturer Communication Number: SIB-34-04-14
TSB/Document Date: 2015-06-06
Summary
BMW
: RUNNING NOISES HEARD WHEN BRAKES ARE APPLIED, WITH HIGH BRAKE LOADS; THROUGH WHEEL OPENING, VISIBLE CRACKS CAN BE SEEN IN BRAKE DISCS AND STEERING WHEEL TORSIONAL VIBRATES WHEN APPLYING BRAKES. *PE
Page 1 of 3
SI B34 04 14
Brakes
SB-10057534-7404
December 2014
Technical Service
SUBJECT
Diagnosis of Compound Brake System Complaints in M Vehicles
MODEL
E46 (M3 Coupe, Convertible)
E60 (M5 Sedan)
E63 (M6 Coupe)
E64 (M6 Convertible)
E82 (1 Series M Coupe)
E85 (M Roadster)
E86 (M Coupe)
E90 (M3 Sedan)
E92 (M3 Coupe)
E93 (M3 Convertible)
F06 (M6 Gran Coupe)
F10 (M5 Sedan)
F12 (M6 Convertible)
F13 (M6 Coupe)
F80 (M3 Sedan)
F82 (M4 Coupe)
F83 (M4 Convertible)
SITUATION
The customer’s complaints may include:
1. Visible cracks in the brake discs can be noticed through the wheel opening or during service.
2. There are temporary vibrations or steering wheel torsional vibrations during braking.
3. After high brake loads, running noises can be heard when applying the brakes.
INFORMATION
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/20062.1.B34041... 12/25/2014
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1. Visible cracks are caused by
high thermal stresses during
rapid heating and cooling of the
brake discs. Braking from high
speed with cold brake
components (less than 212
degrees F) increases the
likelihood of cracks to form.
These surface hairline cracks are
usually spread over the entire
brake disc friction area, and
have no negative influence on
the durability or braking
performance. The rotors should
not be replaced only for their
appearance reasons.
When performing routine service on the brake system (pad replacement due to wear), the brake discs should be
replaced if surface cracks are found to be greater than 13 mm, or if the brake disc thickness is below the minimum
thickness.
Always replace brake discs in pairs (per axle). Install new brake pads when replacing discs. By doing this, the
service life of the friction pad surface is increased, and an even material loss is ensured.
2. Vibrations and/or steering wheel torsional vibrations during braking are caused by applying the brakes on
discs with minimal to heavy corrosion. These vibrations are most noticeable when braking from high speeds
with cold brake components (less than 212 degrees F), and will diminish with normal everyday operation.
Parts replacement is not required.
3. After high brake loads, running
noises can be heard when
applying the brakes, and may
also be heard to a limited extent
after the brakes are released.
(See the note in the Owner's
Manual).
These noises are reduced during
normal everyday operation, due
to further erosion of the brake
pad friction lining.
Visible surface cracks or craterlike recesses on the brake pad
surface are caused by a minor
difference in the material of the
pad lining, which will decrease
with further operation and
should not be replaced due to
their appearance.
WARRANTY INFORMATION
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/20062.1.B34041... 12/25/2014
Page 3 of 3
Not applicable.
[ Copyright ©2014 BMW of North America, Inc. ]
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/20062.1.B34041... 12/25/2014
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
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TSB/Document ID: SIB-34-04-14
Replacement Service Bulletin Number:
MFR Communication Date: 2014-12-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES
MFR Component System:
MFR Component Subsystem:
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