NHTSA ID Number: 11030689
Manufacturer Communication Number: 2081029/1
TSB/Document Date: 2026-04-04
Summary
W12 Engine - Ticking Noise and Possible Low Oil Pressure Indications. The customer may report a ticking noise from the upper engine area, low oil pressure warnings, or a flashing MIL during engine operation.
3S41BB 2020 E
DDBD
TUP
TNJ
3S41BB 2021 E
DDBD
TPT
TNJ
3S41BB 2021 E
DDBD
SVZ
TNJ
3S41BB 2021 E
DDBD
UUR
TNJ
3S41BB 2021 E
DDBD
TUP
TNJ
3S41BB 2021 E
DDBD
UUR
WDY
3S41BB 2021 E
DDBD
UPC
TNJ
3S41BB 2022 E
DDBD
SVZ
TNJ
3S41BB 2022 E
DDBD
TPT
TNJ
3S41BB 2022 E
DDBD
UPC
TNJ
3S41BB 2022 E
DDBD
UUR
TNJ
3S41BB 2022 E
DDBD
TUP
TNJ
3S41BB 2022 E
DDBD
UUR
WDY
3S41EB 2021 E
DDBA
UUR
SQC
3S41EB 2021 E
DDBA
UPC
SQC
3S41EB 2021 E
DDBA
UUR
UWA
3S41EB 2021 E
DDBA
TUP
SQC
3S41EB 2021 E
DDBA
UUR
WEC
3S41EB 2021 E
DDBA
UUR
VFT
3S41EB 2022 E
DDBA
TUP
SQC
3S41EB 2022 E
DDBA
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SQC
3S41EB 2022 E
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UPC
SQC
3S41EB 2022 E
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UWA
3S41EB 2022 E
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WEC
3S41EB 2022 E
DDBA
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VFT
3S41EB 2023 E
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UPC
SQC
3S41EB 2023 E
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TUP
SQC
3S41EB 2023 E
DDBA
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RVH
3S41EB 2023 E
DDBA
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UWA
3S41EB 2023 E
DDBA
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SQC
3S41EB 2023 E
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WEC
3S41EB 2023 E
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3S41EB 2024 E
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3S41EB 2024 E
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3S41EB 2024 E
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SQC
3S41EB 2024 E
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3S41EB 2024 E
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3S41EB 2024 E
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Documents
Document name
master.xml
Technical product information
Transaction No.: 2081029/1
W12 Engine - Ticking Noise and Possible Low Oil Pressure Indications
Customer statement / workshop findings
Customer Statement
The customer may report a ticking noise from the upper engine area, low oil pressure warnings, or a flashing
MIL during engine operation.
Workshop Findings
Customer findings are verified in the workshop. The following symptoms may be present:
•
Audible ticking from the valvetrain area during operation.
•
Low oil pressure warnings and/or MIL displayed via the Driver Information Panel (DIP).
•
Possible misfire events due to incorrect valve operation.
•
Fine metal particles found in oil filter and/or large metal debris detected in the sump.
The following low oil pressure DTC may be stored in the engine electronics (diagnostic address 0001):
•
P052400 – Engine Oil Pressure Too Low (Symptom Code: 21729)
Technical background
Wear on the rocker arm/follower at the valve stem can lead to incorrect valve lash, creating an audible
ticking noise. Hydraulic lifters may then operate outside their optimal range, causing intermittent small drops
in oil pressure, which can trigger low oil pressure warnings. Incorrect valve operation may also lead to
misfires and a flashing MIL. Metal debris from progressive mechanical wear is commonly present in the oil
filter and sump.
Refer to the ‘Measure’ Section and carry out all steps to completion.
Production change
Not applicable, the service bulletin is investigative/diagnostic only.
Measure
WARNING
ALWAYS renew the oil filter element when draining and filling with new engine oil. NEVER reuse engine
oil. Suitably blank all disconnected electrical connectors, electrical connections and pipe work to prevent
the ingress of dirt and moisture.
CAUTION
Before commencing work on and around the engine, ensure that it has cooled sufficiently, failure to do so
may cause injury to personnel. Avoid prolonged and repeated contact with oils and fluids etc. Always
protect the skin with impervious gloves. Always wear suitable eye protection.
Record Evidence
Record a short video clearly capturing the ticking or clicking noise. Determine the applicable diagnostic
scenario:
Scenario 1 – Noise accompanied by low oil pressure:
Record a video of the noise and the low pressure indication.
Proceed directly to Step 1.
Scenario 2 – Noise not accompanied by low oil pressure (clicking only):
Record a video of the noise.
Raise a Full Technical DISS and provide the following information:
•
Confirm the vehicle has full Service history, carried out at the correct time/mileage interval.
•
Whether the vehicle has been serviced within the past 12 months.
•
Oil specification and quantity used at the most recent service.
•
Confirmation that no recent service or repair work could be related.
•
Identify whether the noise originates from the upper or lower area of the engine assembly.
Await Bentley
Product Support instruction before proceeding.
Figure 1. Large debris present in oil example
1. Inspect Oil Sump
Remove the lower oil sump and inspect for large metal debris.
Refer to: ElsaPro → Rep. Gr. 17 – Lower Sump (W12) – To Remove and Fit
Document findings using photos and/or video.
Example: Large debris as shown in Figure 1.
If no debris is present, raise a Full Technical DISS.
Dispose of oil per local environmental regulations. Refer to: ElsaPro → Rep. Gr. 00
2. Inspect Valvetrain (Conditional)
NOTICE
Before performing this inspection, raise a Full Technical DISS for approval by the Powertrain TM.
Once authorised, remove both cam covers and inspect the valvetrain for wear or damage as shown in figure
1 and 2.
Refer to: ElsaPro → Rep. Gr. 15 – Camshaft Covers – To Remove and Fit
Document findings with photos and/or video.
Reference Service Bulletin 2081029 in the DISS.
Figure 2. Valvetrain visible wear damage example 1
Figure 3. Valvetrain visible wear damage example 2
3. Submit All Evidence
Attach all findings to a Technical DISS for review by Bentley Product Support, including:
Video of the noise
Photos of debris, metal contamination, or valvetrain wear
Oil contamination images
Service history and oil specification confirmation (where applicable)
Reference completion of Service Bulletin 2081029 in the DISS query.
Warranty accounting instructions
NOTICE
In the event that any parts are required to be replaced please refer to the warranty accounting instructions
with Elsa pro this is due to the numerous vehicle specification and symptom scenarios.
Warranty type: 110 or 910
Damage service number: 15 54
Damage code: 00 10
Engine Oil Sump – To remove and install
Labour operation code: 17 50 19 00
Time: 190 TU
•
Replacement of major engine components must not be performed without DISS authorisation.
•
Warranty claims must include supporting evidence (oil pressure, photos, sump debris findings, video).
Parts information
Refer to ETKA parts catalogue for all Single Use items as required per ElsaPro workshop information.
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TSB/Document ID: 2081029/1
Replacement Service Bulletin Number:
MFR Communication Date: 2026-03-07
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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