IsItAGoodCar

Common Problems with the
2003–2008 Bentley Continental GT (Mk1)

We've identified 3 known issues that can affect the 2003–2008 Bentley Continental GT (Mk1). 2 of these are serious faults that could be expensive to repair.

3
Known Issues
2
Serious
1
Moderate
0
Minor

The 2003–2008 period has 1 more issue than the Bentley Continental GT (Mk1) average across all year periods.

All Known Issues

W12 Vacuum Pipe Failure

SeriousEngine

Plastic vacuum pipes located behind the engine and over the gearbox become brittle from heat and crack, causing boost leaks and rough idling.

Most affected: 6.0 W12

Estimated cost: £1,500–£7,000Affects: 2003–2008Often appears around: 50k–80k miles

Typical symptoms

  • •Check Engine Light (CEL)
  • •Rough idle
  • •Loss of power
  • •Brake pedal feels hard

What to inspect before you buy

  • ✓Check for error codes related to lean running or boost pressure
  • ✓Ask if pipes have been replaced with silicone or metal versions

Air Strut Leakage

SeriousSuspension & Chassis

The rubber air bags in the suspension struts perish and leak, often leading to a burnt-out compressor.

Most affected: All variants

Estimated cost: £800–£1,200 per cornerAffects: 2003–2011Often appears around: 60k–90k miles

Typical symptoms

  • •Car sags on one corner after parking
  • •Compressor runs continuously
  • •"Stop Car Too Low" warning

What to inspect before you buy

  • ✓Measure ride height at each corner after the car has sat
  • ✓Spray soapy water on struts to check for bubbles during a PPI

Electrical Drain / Battery Failure

ModerateElectrics & Electronics

The dual-battery system (one for starting, one for systems) can be drained by modules that fail to "sleep," leading to numerous false error messages.

Most affected: All variants

Estimated cost: £300–£600Affects: 2003–2011Often appears around: Every 4-5 years

Typical symptoms

  • •Intermittent electrical gremlins
  • •Slow cranking
  • •TPMS or Airbag warnings that clear after driving

What to inspect before you buy

  • ✓Check the age of both batteries in the boot
  • ✓Ensure the car comes with its battery conditioner and it works

Buying Tips for the 2003 Bentley Continental GT (Mk1)

  • ✓Insist on seeing proof of vacuum pipe replacement or the bypass modification.
  • ✓Check for the "Stop Car Too Low" warning after the car has stood overnight.
  • ✓Listen for a noisy air suspension compressor behind the front bumper.
  • ✓Ensure the boot lid spoiler operates correctly at speed or via the manual switch.
2009–2011 Bentley Continental GT (Mk1)

Browse 2003–2008 Bentley Continental GT (Mk1) in our Directory

View MOT history, registration data, and reliability scores for 2003–2008 Bentley Continental GT (Mk1) vehicles.

View 2003–2008 Directory

Other Bentley Continental GT (Mk1) Year Periods

2003–20082009–2011

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