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Service bulletins for the 2020 Bentley Mulsanne

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.

115 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
2028794.72023-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Engine Coolant Mixture - Restrictions on use of desalinated water Customer Statement: -Engine coolant requires topping up or replacing
2057978.72023-11-06. Service bulletin. ENGINE AND ENGINE COOLING. Engine Lubricating Oil - Replenishment Customer Statement: -Engine lubricating oil lamp illuminated on driver instrument panel. Engine lubricating oil requires topping up between services.
2051187/92023-08-03. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Poor Engine Running Complaints (Misfires) Petrol Engines Only. Customer statement / workshop findings: - Poor engine running - Reduced power - Engine warning lamp illuminated - Symptom related DTCs evident within the applicable engine control unit(s) Technical background: Technical Product Information (TPI) to assist retailers when diagnosing poor engine running or misfires.
2070237.12023-06-07. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Engine Control Module Update - Mulsanne (SC 23/12) Technical Background: -Software update is now available and should be applied to the engine control unit
2069806.12023-05-05. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. HVAC Refrigerent Leakage - Diagnosis Guidelines Customer Statement: -HVAC not cooling or HVAC cooling less than expected
2051187.82022-12-08. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Poor Engine Running Complaints (Misfires) Petrol Engines Only Customer Statement: -Poor engine running, reduced power, engine warning lamp illuminated.
2028808.62022-12-08. Service bulletin. ENGINE AND ENGINE COOLING. All 12MY Engine Oil- Service Info: Engine Oil - Specific oil type and oil consumption reference, Technical Background: -The use of the correct oil for each engine type is critical for its continued performance, reliability and ultimately warranty. -The workshop manual should always be the first point of reference, ensuring the correct lubricant is used for each specific model year and engine type -Should oil be required the parts catalogue must be referred to ensuring the correct VIN is always used when ordering.
2064337.22022-12-08. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Usage of E10 Fuel Customer Statement: -In the event a customer asks if E10 fuel can be used, the operative must refer to the Technical background section of this TPI
2053177.182022-12-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. All Vehicle Variants - Spurious DTC List Customer Statement: -Customers will not be aware of any fault codes -Workshop may discover spurious fault codes whilst running a Diagnostic Trouble Code (DTC) log as part of other investigations on the vehicle.
2051187.72022-11-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Poor Engine Running Complaints (Misfires) Petrol Engines Only Customer Statement: -Poor engine running, reduced power, engine warning lamp illuminated.
2051187/62021-10-05. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Poor Engine Running Complaints (Misfires) Petrol Engines Only. Customer statement / workshop findings: Poor engine running, reduced power, engine warning lamp illuminated. Technical background: Technical Product Information (TPI) to assist Retailers when diagnosing poor engine running or misfire. Measure: The following TPI should be carried out sequentially to ensure the root cause and analysis of the concern are identified without unnecessary work or repetitive actions taking place.
2028808/52021-10-04. Service bulletin. ENGINE AND ENGINE COOLING. Service info: Engine oil Specific oil type and oil consumption reference. Customer statement / workshop findings: Engine oil level requires top up between services Technical background: The use of the correct oil for each engine type is critical for its continued performance, reliability and ultimately warranty. The workshop manual should always be the first point of reference, ensuring the correct lubricant is used for each specific model year and engine type Should oil be required the parts catalogue must be referred to ensuring the correct VIN is always used when ordering
2028808/42020-08-05. Service bulletin. ENGINE AND ENGINE COOLING. Engine oil. Specific oil type and oil consumption reference. Customer statement / workshop findings: Engine oil level requires to:p up between services. Technical background The use of the correct oil for each engine type is critical for its continued performance, reliability and ultimately warranty. The workshop manual should always be the first point of reference, ensuring the correct lubricant is used for each specific model year and engine type Should oil be required the parts catalogue must be referred to ensuring the correct VIN is always used when ordering
2051187/52020-01-09. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Condition: Poor engine running, reduced power, engine warning lamp illuminated. Technical Background: Technical Product Information (TPI) to assist Retailers when diagnosing poor engine running or misfires. Service: The following TPI should be carried out sequentially to ensure the root cause and analysis of the concern are identified without unnecessary work or repetitive actions taking place.
2053177/62020-01-09. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Condition: Customer will not be aware of any fault codes. Workshop may discover spurious fault codes whilst running a Diagnostic Trouble Code (DTC) log as part of other investigations on the vehicle. Technical Background: The attached document contains all of the current known Spurious DTCs for all vehicle variants. Should a particular TPI be listed as Archived within the attached document the TPI can no longer be viewed within Elsa pro, in this case please refer to the instructions with the attached document regarding the DTC description and actions (if any) which should be conducted Service: During routine diagnostic interrogation of vehicle systems use the attached document to determine the course of action to be taken.
2057991/12020-01-09. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Customer statement / workshop findings: Malfunction Indicator Lamp (MIL) illuminated on driver instrument panel. Engine runs unevenly when starting from cold. Camshaft position Diagnostic Trouble Codes (DTCs) stored within Engine Control Unit (ECU). Technical background: When the engine is cold increased friction within the camshaft adjuster unit may result in camshaft position DTCs being stored within the ECU. The concern can be resolved by replacing the camshaft timing gear with a B level part which utilises an internal return spring with higher rate. See Parts information below. There are many possible DTCs related to this failure, the following is a typical example P001200 : A Camshaft position (Bank 1) timing over-retarded.
2051187.32019-07-01. Service bulletin. ENGINE. Poor Engine Running Complaints (Misfires) Petrol Engines Only

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.