NHTSA ID Number: 10195032
Manufacturer Communication Number: 2063406/1
TSB/Document Date: 2021-06-04
Summary
Rear brake squeal (5 KHz) Non CSiC brakes only. Customer statement / workshop findings At low speed, during low braking force application, the rear brakes can produce a high frequency noise (5khz). Measure 1) Follow the Brake noise identification TPI 2052785 - IMPORTANT: For frequency analysis the noise recording equipment Bentley
Motors recommends is the Chassis ear tool WT 10437 - Obtain a clear recording using WT 10437 2) Carry out an inspection of the brake system to confirm the brake system components are serviceable as per Elsa pro guidelines 3) Confirm if the brake shim kit (36A 698 219) has previously been fitted to the rear brake pads (As per TPI 2046299/-)
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TSB/Document ID: 2063406/1
Replacement Service Bulletin Number:
MFR Communication Date: 2021-05-24
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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Technical product information
Topic
Market
area
Brand
Rear brake squeal (5 KHz) Non CSiC brakes only
Russische Föderation (5RU),Australia E04 Bentley rest Asia and Australia (6E04),China 796 VW Import Comp. Ltd (Vico), Beijing
(6796),Germany E02 Bentley rest Europe (6E02),Japan E03 Bentley Japan (6E03),Korea, (South) E08 Bentley South Korea
(6E08),United Arab Emirates E06 Bentley Middle East and Africa (6E06),United Kingdom E01 Bentley UK (6E01),United States
E05 Bentley USA and rest America (6E05)
Bentley
Transaction
2063406/1
No.
Level
EH
Status
Approval
Release
date
New customer code
Object of complaint
Complaint type
Position
running gear -> brakes, brake control
noise, vibration
running gear -> brakes, brake control -> service brake noise, vibration -> noise
running gear -> brakes, brake control
component / consumables
Vehicle data
Bentayga (Non CSiC brakes only)
Sales types
Type
4V1*
4V1*
4V1*
4V1*
4V1*
MY
2017
2018
2019
2020
2021
Brand Designation Engine code
E
*
E
*
E
*
E
*
E
*
Documents
Document name
master.xml
Gearbox code
*
*
*
*
*
Final drive code
*
*
*
*
*
Technical product information
Rear brake squeal (5 KHz) Non CSiC brakes only
Transaction No.: 2063406/1
Customer statement / workshop findings
At low speed, during low braking force application, the rear brakes can produce a high frequency noise (5khz)
Technical background
VERY IMPORTANT: This TPI is only applicable to Non-CSiC brake systems only
Production change
Not applicable
Measure
1) Follow the ‘Brake noise identification’ TPI 2052785 - IMPORTANT: For frequency analysis the noise recording equipment Bentley Motors
recommends is the Chassis ear tool WT 10437
•
Obtain a clear recording using WT 10437
2) Carry out an inspection of the brake system to confirm the brake system components are serviceable as per Elsa pro guidelines
3) Confirm if the brake shim kit (36A 698 219) has previously been fitted to the rear brake pads (As per TPI 2046299/-)
IMPORTANT: The operative MUST now confirm the following via a new or existing DISS query:
Yes - The shim kit is fitted
Or
No - The shim kit is not fitted
•
Photograph and record markings (if visible) from the backing plate of all rear brake pads
•
Fit a new rear brake pad set - warranty will only be accepted when all information is correctly supplied, brake parts/assemblies should not
exhibit damage/wear as shown in the Brake Noise Identification TPI 2052785/-
•
Conduct the brake conditioning process as follows:
Brake conditioning process (Iron brakes)
CAUTION: When carrying out the brake pad conditioning (bedding in) process you must adhere to all local speed limits and restrictions
Brake pedal
operation
Initial Speed (km/h
– mph)
Operation 1
Final speed (km/h
– mph)
Deceleration
Cycle Distance
100 km/h or 60 mph 40 km/h or 25 mph
(light braking) approximately 5% of
total braking effort
1 km or 0.6 miles
10
Operation 2
120 km/h or 70 mph 40 km/h or 25 mph
Increase braking effort 10% above
operation 1
1 km or 0.6 miles
3
Operation 3
120 km/h or 70 mph 40 km/h or 25 mph
Increase braking effort 10% above
operation 2
1 km or 0.6 miles
3
Operation 4
120 km/h or 70 mph 40 km/h or 25 mph
Increase braking effort 10% above
operation 3
1 km or 0.6 miles
3
Operation 5
100 km/h or 60 mph
Operation 6
120 km/h or 70 mph 40 km/h or 25 mph
Operation 7
Return to the
dealership
Warranty accounting instructions
Rear brake pads replaced
Warranty type
110 or 910
Damage service number 46 38
Damage code
00 20
0
40 km/h or 25 mph
(Full braking)
Braking effort to be 10% above
operation 3
Normal braking
applications
Repeat
1 km or 0.6 miles
N/A
Number of
cycles
2
10
N/A
Labour
Labour operation code 46 38 20 50
Time
50 TU
Remove and refit both rear wheels
Labour operation code 44 05 20 00
Time
10 TU
Road test/Chassis ear diagnosis
Labour operation code 01 21 00 00
Time
50 TU
Parts information
Refer to the ETKA parts catalogue
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