# Service campaign 2078780/1

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service campaign
- NHTSA id: 11021008
- Published by NHTSA: 2025\-07\-30
- Manufacturer's number: 2078780/1
- Manufacturer's date: 2025\-07\-30
- Campaign id or software version: ED66
- NHTSA component: ENGINE

## NHTSA's summary

Oil Cap Specification Verification \| 25\-26MY \(SC25/38\). Due to an unforeseen supply quality issue from the component provider, certain vehicles have been delivered without the optional Jewel Oil Filler Cap. This part is a customer\-paid option, and in order to avoid further delays and inconvenience to our customers, these vehicles were supplied with the standard Oil Filler Cap in place of the Jewel version

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021008-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021008-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2025 to 2026 BENTLEY BENTAYGA
- 2025 to 2026 BENTLEY BENTAYGA HYBRID
- 2025 to 2026 BENTLEY CONTINENTAL GT
- 2025 to 2026 BENTLEY CONTINENTAL GT CABRIO
- 2025 to 2026 BENTLEY FLYING SPUR

## Other bulletins for the same vehicles and component

- [2083066/1](/bulletins/11037173.md), 2026-09-09, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Drive system fault \- Camshaft position sensor DTC. Customer may state following concerns: Drive system fault on the dashboard Abnormal engine noise on engine start\-up
- [2061369/14](/bulletins/11037161.md), 2026-09-09, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Engine Overheating \- Warning in the DIP \| V8 Kovomo. Customer statement / workshop findings: One or a combination of the following symptoms are evident • Engine overheat warning in the DIP \(Engine overheating\) • Unusual cooling fan operation at high temperatures • P19F700: Low engine coolant temperature indicator lamp coolant too warm • Signs of coolant in the vacuum hoses for switch valve N649
- [2082212/2](/bulletins/11037098.md), 2026-09-05, Service campaign: ENGINE; ELECTRICAL SYSTEM. Subframe Mount Control Unit \- Calibration Update \| Bentayga Series \| 26\-27MY \(SC26/16\) Technical background: On the affected vehicles the current dataset in the J931 power unit mounting control unit causes unintended active operation of the engine mount. The updated calibration replaces the existing dataset with a revised version, deactivating the active mount function.
- [2061369/13](/bulletins/11037097.md), 2026-09-05, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Engine Overheating \- Warning in the DIP \| V8 Kovomo. Customer statement / workshop findings: One or a combination of the following symptoms are evident: • Engine overheat warning in the DIP \(Engine overheating\) • Unusual cooling fan operation at high temperatures • P19F700: Low engine coolant temperature indicator lamp coolant too warm • Signs of coolant in the vacuum hoses for switch valve N649
- [2081085/2](/bulletins/11035939.md), 2026-08-06, Service bulletin: ELECTRICAL SYSTEM; ENGINE. V8 Engine \- Ticking Noise, Misfiring and Possible Low Oil Pressure Indications. Customer statement: The customer may report an audible ticking noise from the top of the engine, low oil pressure warnings / MIL on the Driver Information Panel, and/or misfiring during engine operation
- [2051187/13](/bulletins/11035901.md), 2026-08-05, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Poor Engine Running Complaints \(Misfires\) Petrol Engines Only. Customer statement / workshop findings: • Poor engine running • Reduced power • Engine warning lamp illuminated • Symptom related DTC’s evident within the applicable engine control unit\(s\)
- [2068273/6](/bulletins/11035569.md), 2026-08-03, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Multiple random misfires evident during PDI.
- [2065664/6](/bulletins/11035418.md), 2026-08-01, Service bulletin: ENGINE; ELECTRICAL SYSTEM. Bentayga V8 Kovomo \- Engine MIL light on \- DTC “O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2. Customer statement / workshop findings: DTC P004100: “O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2 is evident within address 0001 \(Engine control unit\) and MIL light active after attempting to conduct a readiness test
- [2081236/2](/bulletins/11035417.md), 2026-08-01, Service bulletin: ENGINE; VISIBILITY/WIPER; ELECTRICAL SYSTEM. Loss of Cabin Heat During Engine Operation \| Bentayga \- V8. Customer Statement: Customers may report that the air conditioning system blows only cold air when the engine is running. Warm air is only available after switching off the engine. The concern is commonly reported after engine removal or recent repair work.
- [2071190/4](/bulletins/11035415.md), 2026-08-01, Service bulletin: ENGINE; VISIBILITY/WIPER; ELECTRICAL SYSTEM. HVAC failing to cool \| DTC B16A1F0 in diagnostic address 00C5 \| Bentayga Series \(Hybrid\).

JSON: [/v1/bulletins/11021008](/v1/bulletins/11021008)

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