IsItAGoodCar
Reliability Guide

Common Problems with the
2007 Audi A8 Mk2 (D3)

By 2007 the D3 was well established and some early electrical issues had been addressed. The 4.2 TDI arrived with immense torque but also immense repair costs. The facelifted interior felt more modern.

What changed for 2007

  • •Updated MMI system with improved graphics
  • •Revised trim and equipment levels
  • •3.0 TDI and 4.2 TDI engine options refined

Common MOT watch-outs

  • !Air suspension leaks still common
  • !Timing chain tensioner issues on V6 TDI
  • !Multitronic CVT gearbox failures on FWD models
4
Known Issues
3
Serious
1
Moderate
0
Minor

All Known Issues

Air Suspension Strut and Compressor Failure

SeriousSuspension & Chassis

The full air suspension on all four corners inevitably develops leaks as the rubber air bellows age, eventually killing the WABCO compressor.

Est. Repair Cost: £800–£3,500
Warning Signs:

One corner sagging overnight, Compressor running constantly, Suspension warning light, Harsh stiff ride

What to Inspect:
  • Park on level ground and check ride height after 12+ hours
  • Listen for compressor running excessively
  • Check for oil residue around struts
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W12 Engine Electrical and Cooling Issues

SeriousEngine

The 6.0 W12 engine requires precise tuning and develops defective ignition coils, clogged injectors, and cooling system leaks, especially after 80k-120k miles.

Est. Repair Cost: £500–£3,000
Warning Signs:

Rough idle, Loss of power, Overheating under load, Increased oil consumption

What to Inspect:
  • Check service history for regular coil replacements
  • Look for coolant leaks around the engine
  • Scan for misfire codes across all 12 cylinders
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Multitronic CVT Gearbox Issues

SeriousGearbox & Transmission

The Multitronic CVT gearbox can judder, flare, or lose drive if fluid changes were skipped or the gearbox ECU starts to fail.

Est. Repair Cost: £1,000–£2,500
Warning Signs:

Rev flare under acceleration, Judder pulling away, Flashing PRNDS or gearbox warning

What to Inspect:
  • Drive from cold and warm in traffic
  • Ask for fluid service invoices
  • Confirm the fitted gearbox and obtain a specialist inspection if engagement is poor
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Electrical Module Failures

ModerateElectrics & Electronics

Ageing electronics cause multiple module failures, including keyless entry antennas, comfort modules, and CAN bus communication faults.

Est. Repair Cost: £200–£1,200
Warning Signs:

Multiple dashboard warnings, Keyless entry not working, Intermittent window or seat faults, Battery drain

What to Inspect:
  • Run a full diagnostic scan with VCDS
  • Test all comfort functions
  • Check for parasitic battery drain
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Buying Tips for 2007 Audi A8 Mk2 (D3)

  • Identify whether the car has Multitronic or Tiptronic and assess its service history
  • Check timing chain noise on cold start for 3.0 TDI models
  • Electrical faults increase with age regardless of mileage
2004–20062008–2010
Check a 2007 Audi A8 Mk2 (D3) by Registration