AI Damage2020 Bentley Mulsanne: common problems
The maker issued 103 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 103
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 6.8 L · petrol · turbo · 8 cyl
- automatic, 8-speed
Drive: RWD
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 61 |
| Equipment | 0 | 0 | 26 |
| Engine and cooling | 0 | 0 | 16 |
| Structure | 0 | 0 | 10 |
| Suspension | 0 | 0 | 9 |
| Visibility | 0 | 0 | 9 |
| Wheels | 0 | 0 | 7 |
| Service brakes | 0 | 0 | 5 |
| Exterior lighting | 0 | 0 | 4 |
| Steering | 0 | 0 | 4 |
| Fuel system | 0 | 0 | 2 |
| Powertrain | 0 | 0 | 2 |
| Latches, locks, linkages | 0 | 0 | 1 |
| Other | 0 | 0 | 1 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- HVAC refrigerant leakage suspected or reports of a damp/musty smell within the cabin - Diagnosis guidelines
Customer statement / workshop findings: HVAC not cooling / HVAC cooling less than expected / HVAC refrigerant leakage confirmed Or The customer reports a damp/musty smell within the cabin Note: For this scenario please…
- 12 Volt - Battery condition checks. Customer statement / workshop findings
12 volt battery flat or unserviceable Technical background: For all 12 volt battery issues relating to warranty or a parts warranty claim refer to the instructions within the Measure section.
- Spurious DTC identification. Customer statement / workshop findings
Customers will not be aware of any DTCs, workshop operatives may discover spurious DTCs whilst running Guided Fault Finding (GFF) when using ODIS Technical background: To determine the course of action which should be…
- Engine Coolant Mixture - Restrictions on use of desalinated water Customer Statement
Engine coolant requires topping up or replacing
- Brake Noise Identification
Customer Statement: -Noise/squeal complaint from the braking system Technical Background: -The noise/squeal can be reproduced and clearly assigned to the braking system
- Tyre tread/sidewall crack(s) Customer Statement
Cracks evident in the sidewall and/or tread pattern (See the examples in Figures 1 and 2 showing cracks within the tread pattern)
- Infotainment Main unit (5F / J794) fault finding/diagnosis procedure Customer Statement
Issue suspected with the Infotainment Main unit (5F / J794) - For example: MMI screen image flickers or goes blank No response to selection Audio cuts-out
- Road wheel inspection procedure Customer Statement
In the event a complaint is received regarding road wheel/s condition for example: - Scratches - Corrosion - Damage - Blemishes - Chipping Please refer to the onward instructions
- Telephone Functionality Complaint - Minimum Standards Required For Analysis Of Concerns
Customer statement / workshop findings: The feedback method within this TPI is required should a complaint of telephone functionality and/or quality be reported. Technical background: The minimum standards check list…
- Engine Lubricating Oil - Replenishment Customer Statement
Engine lubricating oil lamp illuminated on driver instrument panel. Engine lubricating oil requires topping up between services.
- Running gear - Noise identification Workshop Findings
The noise can be reproduced and clearly assigned to the suspension system from either of the axles And/or The noise can be reproduced and clearly assigned to the steering system Prior to starting the instructions…
- Key blade can be difficult to remove from key fob. Technical Background
Deviations in the key blade and key fob assembly could make it difficult to remove the key blade.
NHTSA lists 103 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2020 Bentley Mulsanne?
There are no owner complaints in the NHTSA data for this year; the data comes from 103 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2020 Bentley Mulsanne?
NHTSA lists 103 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2020 Bentley Mulsanne from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2020 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.