IsItAGoodCar
Reliability Guide

Common Problems with the
2014 Bentley Mulsanne

The Mulsanne Speed arrived with 530bhp and the facelifted model brought revised styling and improved infotainment. These mid-life cars offer a good balance between value and reliability.

What changed for 2014

  • •Mulsanne Speed with 530bhp
  • •Revised styling and interior
  • •Improved infotainment system

Common MOT watch-outs

  • !Power steering pump failure
  • !Air suspension leaks
  • !Brake disc corrosion from low use
3
Known Issues
2
Serious
1
Moderate
0
Minor

All Known Issues

Power Steering Pump Failure

SeriousSteering

The hydraulic steering pump can fail, leading to heavy steering or noisy operation.

Est. Repair Cost: £1,800–£3,000
Warning Signs:

Stiff steering, Whining/Groaning noise when turning, Fluid leaks

What to Inspect:
  • Listen for noise when turning the wheel from lock to lock while stationary
Verified by IsItAGoodCar Research Team

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 2014 Bentley Mulsanne

  • ✓Check the power steering pump for noise or fluid leaks
  • ✓Verify the air suspension holds height overnight
  • ✓Inspect the brake discs for scoring
2011–20132015
Check a 2014 Bentley Mulsanne by Registration