B340615

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SI B34 06 15
Brakes
November 2016
Technical Service
Grinding Noise from Rear Brakes
New information provided by this revision is preceded by this symbol
.
This Service Information bulletin supersedes SI 34 06 15 dated October 2015.
MODEL
F80 (M3 Sedan)
F82 (M4 Coupe)
From start of
production 3/1/14 to
1/1/17
With the standard compound
brakes or optional Carbon
Ceramic (2NK)
F83 (M4
Convertible)
F87
(M2 Coupe)
SITUATION
Pebbles, road grit, or other foreign materials can get caught in between the brake protection
(backing) plate and the brake disc(s), this may cause a disturbing noise in the rear axle area while
driving.
PROCEDURE
For the situation described above:
1. For vehicle with standard compound brakes.
A new brake protection plate has been developed for each side of the vehicle, replace the
old brake protection plate with:
Brake protection plate left P/N 34 20 8 053 265
Brake protection plate right P/N 34 20 8 053 266
2. For vehicles equipped with carbon ceramic brakes (2NK).
These vehicles are not affected by the conversion of the brake protection plates.
A . For these vehicles with the brake protection plate lower than index 04, install the new
protection plate (P/N 34 21 2 284 745) with index 04.
B. Vehicles with brake protection plate index 04 already installed, remove the captured
material between the brake disc and protection plate.
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A parts exchange of other brake components will not provide a resolution.
PARTS INFORMATION
Part Number
Description
Quantity
34 20 8 053 265
Protection plate left
1
34 20 8 053 266
Protection plate right
1
Carbon ceramic brakes (2NK)
Part Number
Description
Quantity
34 21 2 284 745
Protection plate
2
WARRANTY INFORMATION
Procedure “1.” and “2A.” are covered under the terms of the BMW New Vehicle Limited Warranty
for Passenger Cars and Light Trucks.
Defect Code:
3421033900
Labor Operation:
Labor Allowance:
Description:
34 21 284
Refer to KSD2
Removing and installing or replacing
both rear protective plates (Main work)
Refer to KSD2
Removing and installing or replacing
both rear protective plates (Plus work)
Refer to KSD2
Removing and installing or replacing
both rear protective plates (Wheels
already removed)
Or:
34 21 784
Or:
34 21 785
If you are using a Main labor code for another repair, use the Plus code labor operation 34 21 784
instead, or if the rear wheels are already removed, use 34 21 785
[ Copyright ©2016 BMW of North America, Inc. ]
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/382... 1/5/2017