NHTSA ID Number: 10151096
Manufacturer Communication Number: B340315
TSB/Document Date: 2018-12-10
Summary
SUBJECT Uneven Brake Pad Wear with Regenerative Braking. Under certain vehicle operating conditions, the brake calipers' outer pads (without wear sensor) will wear faster than the inner pads (with wear sensor). This is a normal brake pad wear characteristic that is inherent to the design of this vehicle. CAUSE Certain driving styles can result with a more frequent fluctuation between the use of the vehicle's service brake and its regenerative braking feature, this type of braking characteristic increases the use and consequently the wear of the outer brake pads.
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SI B34 03 15
Brakes
February 2016
Technical Service
SUBJECT
Uneven Brake Pad Wear with Regenerative Braking
MODEL
I12 (i8)
SITUATION
Under certain vehicle operating conditions, the brake calipers’ outer pads (without wear sensor)
will wear faster than the inner pads (with wear sensor).
This is a normal brake pad wear characteristic that is inherent to the design of this vehicle.
CAUSE
Certain driving styles can result with a more frequent fluctuation between the use of the vehicle’s
service brake and its regenerative braking feature, this type of braking characteristic increases the
use and consequently the wear of the outer brake pads.
PROCEDURE
In order to improve the monitoring as to the amount of wear that is occurring to the “non-sensored”
outer brake pads, an enhanced checking procedure has been developed.
The “Service - standard scope” labor operation (00 00 105) for the “i8” now includes the task for
checking the front and rear brake pads thickness through the wheel.
Front Axle - Outer Pad Thickness*
If the “smallest” measured value is:
z
Greater than 6.0mm, no further action is required.
If the “smallest” measured value is:
z
Equal to or less than 6.0mm, perform the “additional work - check front inner brake pad”
with applying the matrix that is provided in repair instruction number “34 00 600.”
And for the:
Rear Axle - Outer Pad Thickness*
If the “smallest” measured value is:
z
Greater than 8.5mm, no further action is required.
If the “smallest” measured value is:
https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/306... 3/3/2016
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z
Equal to or less than 8.5mm, perform the “additional work - check rear inner brake pad” with
applying the matrix that is provided in repair instruction number “34 00 601.”
For further information, also refer to SI B00 07 14.
*Important Note: Always refer the latest version of ISTA for the most current repair
instructions, technical data and measurement specifications.
WARRANTY INFORMATION
Covered under the terms of an “active” BMW
Maintenance Program for Passenger Cars and Light
Trucks.
Defect Code:
85 99 05 01 MP
Standard Scope
Labor Operation:
Labor Allowance:
Description:
Refer to KSD2
Service – standard scope (includes
checking the remaining brake pad
thickness through the wheel – front and
rear) (Main work)
00 00 105
As always, complete the “Standard scope” in conjunction with one or more of the applicable
maintenance service tasks that display in the BMW
Maintenance System when they qualify to be
performed.
If the outer brake pads “smallest measured value” is at or below the “thickness specification” that
applies, the “additional work for brake pad thickness check” with applying the repair instruction
matrix must be performed.
Additional Work for Brake Pad Thickness Check/Brake Pad Replacement
Model Years 2014, 2015 and 2016: Covered under the terms of an “active” BMW
Maintenance
Program for Passenger Cars and Light Trucks.
Model Year 2017 and newer: Covered under the terms of an “active” BMW
Maintenance
Program Upgrade for Passenger Cars and Light Trucks that provides brake pad coverage.
Defect Code:
34 35 00 77 MP
i8 Additional work – Checking Inner
Brake Pad Thickness
Labor Operation:
Labor Allowance:
Description:
Refer to KSD2
Check additional work for front brake
pad thickness (Check front inner brake
pad)
34 00 600
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And/or:
34 00 601
Refer to KSD2
Check additional work for rear brake
pad thickness (Check rear inner brake
pad)
If the brake pads do not qualify for replacement, no further action is required.
If the brake pads (front, rear or both) qualify for replacement, submit a claim with the
corresponding information listed below that applies:
Defect Code:
34 11 00 77 MP
Brake Pads – Front
Or:
34 11 77 77 MP
Brake Pads and Discs – Front
Labor Operation:
Labor Allowance:
Description:
00 00 612
Refer to KSD2
Service, front brakes**
34 21 00 77 MP
Brake Pads – Rear
Or:
Defect Code:
Or:
34 21 77 77 MP
Brake Pads and Discs – Rear
Labor Operation:
Labor Allowance:
Description:
00 00 614
Refer to KSD2
Service, rear brakes**
34 11 00 35 MP
Brake Pads – Front and Rear
Or:
Defect Code:
Or:
34 11 00 38 MP
Brake Pads and Discs – Front and
Rear
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Labor Operation:
Labor Allowance:
Description:
00 00 613
Refer to KSD2
Service, front brake/rear brake**
** Refer to KSD2 for the corresponding flat rate unit (FRU) allowances and the additional
associated labor operation(s) for replacing the brake discs if they also qualify for replacement (See
Main group 34).
[ Copyright ©2016 BMW of North America, Inc. ]
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- 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: B340315
Replacement Service Bulletin Number:
MFR Communication Date: 2016-02-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, HYDRAULIC
MFR Component System:
MFR Component Subsystem:
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