Power Steering Pump Failure
SeriousSteeringThe hydraulic steering pump can fail, leading to heavy steering or noisy operation.
Est. Repair Cost: £1,800–£3,000
Reliability GuideCommon Problems with the
Common Problems with the
2015 Bentley Mulsanne
We've identified 3 known issues that can affect the 2015 Bentley Mulsanne. 2 of these are serious faults that could be expensive to repair.
3
Known Issues
2
Serious
1
Moderate
0
Minor
All Known Issues
6.75L V8 Turbo Oil Feed Line Leaks
SeriousEngineThe legendary 6.75-litre V8 uses turbo oil feed lines that can develop leaks as they age, leading to oil consumption, potential turbo damage, and in severe cases engine bay fires if oil contacts hot exhaust components.
Est. Repair Cost: £1,500–£4,000
Coolant Expansion Tank Leaks
ModerateCooling SystemThe plastic expansion tanks can crack or the seals can fail, leading to slow coolant loss.
Est. Repair Cost: £400–£800
Buying Tips for 2015 Bentley Mulsanne
- ✓Listen for any "whining" from the power steering pump.
- ✓Check for signs of coolant leaks around the front of the engine.
- ✓Ensure the rear picnic tables and entertainment screens operate perfectly.
- ✓Verify that all original accessories (umbrellas, vanity kits) are present.