NHTSA ID Number: 10200048
Manufacturer Communication Number: 2048616/9
TSB/Document Date: 2021-08-06
Summary
Creaking noise from the front suspension when manoeuvring. Customer statement / workshop findings: Creaking noise from the front suspension when manoeuvring Technical background Verify that the customer complaint matches the sound file within the Bentley
Hub Reference TPI Transaction number 2048616/- TIP: When listening to the sound file the noise can be heard from between 0 and 3 seconds The noise present in the sound file is caused by defective Lower suspension lever - Rear - Hydraulic mounts. In order to reproduce the noise this bush must be twisted, therefore the noise can appear in the following circumstances - When performing parking manoeuvers with the brake applied - When steering from lock to lock with the vehicle in motion and the brake applied - When the vehicle is moved with steering input over uneven surfaces (for e.g. a ramp or speed bump) If the customer complaint occurs in any of the above circumstances and the noise can be clearly assigned to the noise within the sound file Refer to the instructions within the Measure section of this TPI
Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date
Creaking noise from the front suspension when manoeuvring
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2048616/9
EH
Approval
New customer code
Object of complaint
Complaint type
Position
running gear -> shock absorber/suspension control -> jounce noise, vibration -> creak front
New workshop code
Object of complaint
Complaint type
Position
running gear -> running gear, springs, shock absorbers -> axle member mount noise, vibration -> noise left
running gear -> running gear, springs, shock absorbers -> axle member mount noise, vibration -> noise right
Vehicle data
Bentayga series
Sales types
Type MY Brand Designation Engine code Gearbox code Final drive code
4V1*
4V1*
4V1*
4V1*
4V1*
2017
2018
2019
2020
2021
E
E
E
E
E
Documents
Document name
master.xml
*
*
*
*
*
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*
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Technical product information
Creaking noise from the front suspension when manoeuvring
Transaction No.: 2048616/9
Customer statement / workshop findings
Creaking noise from the front suspension when manoeuvring
Technical background
Verify that the customer complaint matches the sound file within the Bentley Hub – Reference TPI Transaction number 2048616/TIP: When listening to the sound file the noise can be heard from between 0 and 3 seconds
The noise present in the sound file is caused by defective Lower suspension lever - Rear - Hydraulic mounts. In order to reproduce the noise this
bush must be twisted, therefore the noise can appear in the following circumstances
•
When performing parking manoeuvers with the brake applied
•
When steering from lock to lock with the vehicle in motion and the brake applied
•
When the vehicle is moved with steering input over uneven surfaces (for e.g. a ramp or speed bump)
If the customer complaint occurs in any of the above circumstances and the noise can be clearly assigned to the noise within the sound file –
Refer to the instructions within the Measure section of this TPI
VERY IMPORTANT NOTE FOR HYBRID VEHICLES:
•
Hybrid vehicles use a High voltage system and MUST only be worked on by suitably qualified personnel.
•
Please ensure all guidelines within the repair manual are strictly followed before and whilst conducting any work on
vehicles with a High voltage system
Production change
Not applicable
Measure
1) Replace the right hand front and left hand front rearmost lower suspension lever inner hydraulic mounts - Refer to Repair manual Rep.Gr.40
front suspension, lower suspension lever bushes – to remove and fit
NOTE: The lubricant quoted within the procedure should be sourced locally or use a suitable alternative of the same
specification
Figure 1 shows for example the left hand front rearmost lower suspension lever (A) the hydraulic mount which must be changed is located at (B)
NOTE: Ensure the right and left hand side hydraulic mounts are replaced
Within the Repair manual procedure there are single use items which must be replaced and not reused. Ensure that new
replacements are available prior to starting this procedure – Refer to Elsa pro and ETKA parts catalogue
Figure 1
2) Depending on vehicle specification (W12 only)
Carry out wheel alignment and ensure the driver assist system calibrations are performed as follows:
•
Vehicle front + rear measured wheel alignment checked
•
Rear wheel camber adjust
•
Rear wheel track adjust
•
Front wheel camber adjust
•
Front wheel track adjust
•
(ACC) - Radar sensor checked + adjusted
•
Overhead view camera adjusted
•
Driver assist camera adjusted
•
Control unit for (Lane change assist) adjusted
•
Night vision system calibration
•
Headlamps to adjust
3) Raise a non-technical DISS query attaching the following
•
Before and after screen shots of the wheel alignment results
•
Screen shots confirming the applicable drive assist systems have been successfully adjusted/calibrated
Warranty accounting instructions
Warranty type
110 or 910
Damage Service Number 40 20
Damage Code
00 20
Bentayga Kovomo V8
Labour Operation Code 40 20 56 20
Time
260 TU
Bentayga Hybrid
Labour Operation Code 40 20 56 30 (Use 99 index until 21/08/21)
Time
250 TU
Bentayga Diesel
Labour Operation Code 40 20 56 40
Time
270 TU
Bentayga W12
Labour Operation Code 40 20 56 00
Time
590 TU
Alignment procedures depending on vehicle specification (W12 only)
•
Vehicle front + rear measured wheel alignment checked - 44 95 03 00 - 110 TU
•
Rear wheel camber adjust - 44 94 15 50 - 30 TU
•
Rear wheel track adjust - 44 93 15 50 - 30 TU
•
Front wheel camber adjust - 44 89 15 50 - 40 TU
•
Front wheel track adjust - 44 88 15 50 - 20 TU
•
(ACC) - Radar sensor checked + adjusted - 91 63 05 51 - 30 TU
•
Overhead view camera adjusted - 90 83 15 00 - 40 TU
•
Driver assist camera adjusted - 96 38 15 50 - 120 TU
•
Control unit for (Lane change assist) adjusted - 96 35 15 00 - 50 TU
•
Night vision system calibration - 90 80 15 50 - 40 TU
•
Headlamps to adjust - 94 15 16 00 20 TU
Parts information
Part number
Description
Quantity
Refer to ETKA parts catalogue
Hydraulic mounts
2
Refer to ETKA parts catalogue
Single use items (As per the applicable
Rep.Gr instruction)
As per the applicable
Rep.Gr instruction
- 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: 2048616/9
Replacement Service Bulletin Number:
MFR Communication Date: 2021-07-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SUSPENSION
MFR Component System:
MFR Component Subsystem:
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