IsItAGoodCar
Reliability Guide

Common Problems with the
2010 Bentley Mulsanne

The Mulsanne launched as Bentleys flagship saloon, replacing the Arnage with a new 6.75-litre V8 engine. These early cars are the most affordable but carry the highest maintenance risk, particularly regarding power steering pump failure and coolant leaks.

What changed for 2010

  • •UK launch of Mulsanne
  • •6.75-litre V8 engine
  • •Flagship Bentley saloon

Common MOT watch-outs

  • !Power steering pump failure
  • !Coolant leaks around front of engine
  • !Rear picnic table and entertainment screen failures
2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

6.75L V8 Turbo Oil Feed Line Leaks

SeriousEngine

The 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
Warning Signs:

Oil smell after driving, Visible oil residue around turbo area, Oil pressure warnings, Smoke from engine bay

What to Inspect:
  • Inspect turbo oil feed and return lines for seepage
  • Check for oil residue in the engine bay
  • Ask for history of turbo-related work
Verified by IsItAGoodCar Research Team

Coolant Expansion Tank Leaks

ModerateCooling System

The plastic expansion tanks can crack or the seals can fail, leading to slow coolant loss.

Est. Repair Cost: £400–£800
Warning Signs:

Low coolant warning, Sweet smell of antifreeze, White residue on the tank

What to Inspect:
  • Visually inspect the expansion tank for hairline cracks or pink/orange residue
Verified by IsItAGoodCar Research Team

Buying Tips for 2010 Bentley Mulsanne

  • ✓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 are present
2011–2013
Check a 2010 Bentley Mulsanne by Registration