Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Bentayga rear brake noise/squeal - Repair method depending on the brake noise frequency (Iron brakes only)
Bentley: worldwide (2WBE)
Bentley
2071730/3
EH
Approval

New customer code
Object of complaint
Complaint type
Position
running gear -> brakes, brake control -> service brake noise, vibration -> noise
New workshop code
Object of complaint
Complaint type
Position
running gear -> brake system -> brake pads (disc brake) noise, vibration -> noise rear right
running gear -> brake system -> brake pads (disc brake) noise, vibration -> noise rear left

Vehicle data
Bentayga series
Sales types
Type
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
ZV1*
ZV1*

MY
2017
2018
2019
2020
2021
2022
2023
2024
2023
2024

Brand Designation Engine code Gearbox code Final drive code
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*

Documents
Document name
master.xml
scenario1english2071730.pdf
scenario2english2071730.pdf
scenario3english2071730.pdf

Technical product information
Bentayga rear brake noise/squeal - Repair method depending on the brake noise frequency (Iron brakes only)

Transaction No.: 2071730/3

Customer statement / workshop findings
Brake noise/squeal from the rear brakes

Technical background
CAUTION

Step 1 within the Measure section must be conducted to identify the symptom and frequency of the brake noise

Scenario 1
Vibration of 1.2 to 1.4 KHz is produced from the rear brakes whilst braking at low speed
Whilst braking at low speed, a vibration of 1.2 to 1.4 KHz or 5 KHz can be produced from friction between the rear brake pad and disc resulting
in rear brake noise/squeal
Scenario 2
Vibration of 3.4 KHz is produced from the rear brakes
While braking at low speed a vibration of 3.4 KHz can be produced during brake application at low speed resulting in rear brake noise/squeal
Scenario 3
Vibration of 5 KHz is produced from the rear brakes whilst braking at low speed
Whilst braking at low speed, a vibration of 5 KHz can be produced from friction between the rear brake pad and disc resulting in rear brake
noise/squeal

Production change
-

Measure
Step 1 must be conducted to identify the symptom and frequency of the brake noise
1) Carry out an inspection of the brake system to confirm the brake system components are serviceable as per Elsa pro guidelines
NOTICE

NOTICE

2) Record the noise and frequency
Hint: For frequency analysis and noise recording we recommend using the Chassis Ear Tool WT 10437
The sound recording/video can also be taken from a mobile telephone as long as the noise/frequency is clearly identifiable
If the noise cannot be reproduced a customer recording of the noise is also acceptable as long as the noise/frequency is clearly identifiable
Hint: The operative can also refer to TPI 2052785/- for further guidelines regarding brake noise identification
•

The operative MUST conduct the applicable scenario depending on the frequency of the noise

IMPORTANT: Prior to conducting any of the rework instructions, please ensure that all required information is attached to a
new or existing DISS query including photographs and videos to support evidence of the brake noise complaint, failure to
supply the requested information could result in the warranty claim being cancelled

Scenario 1 - Vibration of 1.2 to 1.4 KHz is produced from the rear brakes whilst braking at low speed
CAUTION

Bentayga standard wheel base
Black Calliper - SJAA514VXPC018789
Red Calliper - SJAAT2ZV6PC018986
Bentayga extended wheel base
Black Calliper - SJAH514V0PC018914
Red Calliper - SJAHT2ZV2PC019003
However
In the event the issue is evident before the previously listed VIN’s, please continue with the onward instructions
1) Remove the rear brake pads as per Repair manual Rep.Gr 46 - Rear Brake Pads - To Remove and Fit
•

Check the condition of the brake pads

Hint: If the brake pads are to be refitted it will be necessary to make note of the original pad fitment position for installation purposes
•

Fit the shim set 36A 698 219 to the rear brake pads (the kit consists of one shim per pad) and apply G052 560 A2 “Vary Bond Regular
Grade Grease as detailed within the attached Scenario 1 - Rear brake pad shim and grease application process
CAUTION

2) Once the grease and shims have been fitted - Clean the faces of the caliper carrier where the brake pads are in contact using a suitable
brake cleaner
•

Clean off any remaining dirt and brake dust which has accumulated using a suitable brake cleaner

3) Wipe the face of the piston to remove any brake dust or dirt
4) Refit the rear brake pads as per Rep.Gr 46 - Rear Brake Pads - To Remove and Fit, taking care not to dis-lodge the grease/shims before the
pads are in position
5) Carry out a road test to confirm the noise is no longer evident
6) On return to the workshop, visually check and remove any excess grease which may have come out from between the shims

Scenario 2 - Vibration of 3.4 KHz is produced from the rear brakes
Fitment of rear brake calliper carriers for complaints relating to 3.4 KHz rear brake squeal
Left and right hand side orientation is referred to within this document
The left and right hand should be determined as viewed by the operative when standing on the underside of the vehicle and
looking/facing towards the front of the vehicle
NOTE: Within the Rep.Gr procedures quoted within this document there are single use items which must be replaced and not
reused. Ensure that new replacements are available prior to starting this procedure
1) Remove the left and right hand rear brake discs including the rear carriers as per Rep.Gr 46
Hint: The rear brake discs should be replaced in the event that the discs are not to specification as per Rep.Gr 46 - Brake discs - Checking
condition and run-out (see note in the Warranty accounting instructions)
•

Discard all previously removed parts as per all local environmental guidelines

Ensure all mating surfaces and brake components which are to be refitted (including rear brake callipers and the piston
faces) are clean before reassembly
2) Referring to Rep.Gr 46 - Fit the left and right hand rear brake discs
3) Referring to Rep.Gr 46 - Fit the left and right hand rear carriers as follows:
Hint: There are two colours available (red and black) for photographic purposes only, black carriers are shown as follows:
Figure 1 and Figure 2 - Left hand side
Figure 3 and Figure 4 - Right hand side

Figure 1

Figure 2

Figure 3

Figure 4
VERY IMPORTANT: Do not under any circumstances remove the rubber guide pins (Figure 5) from the new carriers as they
have a predetermined level of grease applied that MUST not be disturbed

Figure 5
VERY IMPORTANT: Figure 6 shows the location in which the rubber pins should be positioned once the callipers have been fitted to specification

CAUTION
Only fit the shim set provided with the service kits to the rear brake pads and apply G052 560 A2 “Vary Bond Regular
Grade Grease as detailed within the attached Scenario 2 - Rear brake pad shim and grease application process
CAUTION

4) Once the grease and shims have been fitted - Clean the faces of the calliper carrier where the brake pads are in contact using a suitable
brake cleaner
•

Clean off any remaining dirt and brake dust which has accumulated using a suitable brake cleaner

5) Wipe the face of the piston to remove any brake dust or dirt
6) Refit the rear brake pads as per Rep.Gr 46 - Rear Brake Pads - To Remove and Fit, taking care not to dis-lodge the grease/shims before the
pads are in position
7) Carry out a road test to confirm the noise is no longer evident
8) On return to the workshop, visually check and remove any excess grease which may have come out from between the shims

Scenario 3 - Vibration of 5 KHz is produced from the rear brakes whilst braking at low speed
1) Confirm if the brake shim kit (36A 698 219) and grease has previously been fitted to the rear brake pads as per the attached Scenario 3 Rear brake pad shim and grease application process
Yes - The shim kit is fitted - Continue from step 2
Or
No - The shim kit is not fitted - Fit the rear brake shim kit as described within the attached Scenario 3 - Rear brake pad shim and grease
application process once fitted continue from step 2
2) Fit a new rear brake pad set
3) Clean the faces of the caliper carrier where the brake pads are in contact using a suitable brake cleaner
•

Clean off any remaining dirt and brake dust which has accumulated using a suitable brake cleaner

6) Wipe the face of the piston to remove any brake dust or dirt
7) Refit the rear brake pads as per Rep.Gr 46 - Rear Brake Pads - To Remove and Fit, taking care not to dis-lodge the grease/shims before the
pads are fitted in position
8) Carry out a road test to confirm the noise is no longer evident
9) On return to the workshop, visually check and remove any excess grease which may have come out from between the shims

Warranty accounting instructions
For all Warranty accounting instructions please refer to the applicable attached rework instruction (Scenario 1, Scenario 2 and Scenario 3)
Exclusions from Warranty
Warranty claims are excluded in cases where the claim is directly related to the fact that:
•

The customer failed to report the defect as soon as it became apparent or did not allow the required repairs to be carried out as soon as
possible

•

The fault was caused by outside influences, such chemical or vegetation damage, flying gravel/stones, aggressive cleaning agents, etc

•

The vehicle has been previously repaired without following Bentley Motors repair procedures

•

Parts have been fitted to the vehicles that are not approved by Bentley Motors

•

The customer has failed to follow the regulations for use of the vehicle

•

The vehicle was overburdened or used for purposes for which it was not intended (e.g.racing, towing excessive loads, etc.)

•

Natural wear and tear is excluded from the Warranty

Any rework which shows a lack of grease, or poor/incorrect application grease and/or incorrect application of grease with extensive dirt on
callipers or calliper carriers, for these scenarios warranty payment will not be considered
NOTE: Warranty payments for repeat repairs will not be considered if the grease is deemed to have not been applied correctly
All authorised Bentley Retailers must guarantee their workmanship for 12 months or12,000 miles (19,300 kilometres), whichever occurs first
Wear and Tear and Service Items
Items where the lifetime of the component is or can be influenced by driving style and external factors (Brake pads and brake discs) will only be
considered under the terms of the Warranty for a period of six months or 6,250 miles (10,060 kilometres), whichever occurs first. Beyond that
limit, the defects must be classified as wear and tear and will not be covered by the Warranty
NOTICE

Parts information
For all Parts information please refer to the applicable attached rework instruction (Scenario 1, Scenario 2 and Scenario 3)

Scenario 1
Rear brake pad shim and grease application process Vibration of 1.2 to 1.4 KHz
CAUTION
VERY IMPORTANT: The application of the grease MUST be exactly as shown/detailed ensuring
the exact amount of grease is applied to the locations shown

1) Referring to Figure 1 - Apply 6 dots of grease (< 1.0g in total) to the inside face of the clip on each
shim (x4 in total)

Figure 1

INTERNAL

 Referring to Figure 2 - Using a suitable spatula spread the grease to an even layer condition (x4
shims in total)

Figure 2
2) Assemble the clip-on shim onto each pad
3) Once each shim has been assembled to each pad - Squeeze together firmly to remove any excess
grease which comes out from between the new shim and the brake pad bonded shim

IMPORTANT: Ensure ALL excess grease is removed prior to fitting the brake pads
NOTE: Ensure the new shim is seated flat against the brake pad bonded shim

INTERNAL

4) Referring to Figures 3 and 4 - Apply a small dot of grease to the pad abutments and the springs of
each pad

Figure 3

Figure 4

INTERNAL

5) Once the grease and shims have been fitted - Clean the faces of the caliper carrier where the
brake pads are in contact using a suitable brake cleaner
• Clean off any remaining dirt and brake dust which has accumulated using a suitable brake
cleaner
6) Wipe the face of the piston to remove any brake dust or dirt
7) Refit the rear brake pads as per Rep.Gr 46 - Rear Brake Pads - To Remove and Fit, taking
care not to dis-lodge the grease/shims before the pads are in position
8) Carry out a road test to confirm the noise is no longer evident
9) On return to the workshop, visually check and remove any excess grease which may have
come out from between the shims

Warranty accounting instructions
Scenario 1
Warranty Type 110 or 910
Damage Service Number 46 38
Damage Code

00 20

Time to install shim set
Labour operation code

46 38 42 50

Time

20 TU

4 Brake pads - Rear - Removed and Refitted
Labour Operation Code 46 38 20 50
Time 50 Time units
2 Wheels Removed and Refitted
Labour Operation Code 44 05 20 00
Time 10 Time units
Frequency diagnosis including road test
Labour Operation Code
Time

47 01 01 00
80 Time units (includes road test 01 21 00 00 - 50 Time units)

Exclusions from Warranty
Warranty claims are excluded in cases where the claim is directly related to the fact that:
• The customer failed to report the defect as soon as it became apparent or did not allow the
required repairs to be carried out as soon as possible

INTERNAL

•

The fault was caused by outside influences, such chemical or vegetation damage, flying
gravel/stones, aggressive cleaning agents, etc

•

The vehicle has been previously repaired without following Bentley Motors repair procedures

•

Parts have been fitted to the vehicles that are not approved by Bentley Motors

•

The customer has failed to follow the regulations for use of the vehicle

•

The vehicle was overburdened or used for purposes for which it was not intended
(e.g.racing, towing excessive loads, etc.)

•

Natural wear and tear is excluded from the Warranty

Any rework which shows a lack of grease, or poor/incorrect application grease and/or incorrect
application of grease with extensive dirt on callipers or calliper carriers, for these scenarios
warranty payment will not be considered
NOTE: Warranty payments for repeat repairs will not be considered if the grease is deemed to
have not been applied correctly