Used car guide

2004 Audi A8: common problems and what to check

What gets flagged at MOT on 2004 Audi A8s, from 165 tests in 2025, plus known faults and what to look at before you buy one.

Small sample: only 165 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.

165MOT tests in 2025
79%pass first time (all 2004 cars: 58%)
6,500typical miles a year
33%had suspension flagged

What gets flagged at MOT

The share of 2004 Audi A8 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    33% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Brakes
    29% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Tyres
    28% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Lights and electrics
    21% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Exhaust and emissions
    10% of testsRough price £100–£1,200

    At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.

  • Oil and fluid leaks
    8% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

Looking at an Audi A8?

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Other years

YearMOT testsMost flagged
2023154Tyres 12%
2022251Tyres 16%
2021293Tyres 15%
2020401Tyres 20%
2019728Tyres 15%
2018954Tyres 19%
2017662Tyres 18%
2016884Tyres 19%
2015921Tyres 20%
2014838Tyres 20%
2013697Tyres 20%
2012676Tyres 24%
2011670Tyres 27%
2010428Suspension 29%
2009338Suspension 27%
2008584Tyres 26%
2007472Suspension 33%
2006332Suspension 27%
2005273Suspension 30%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2004 Audi A8s registered in 2004. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score