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Used Audi A4 Fault Guides

Used Car Expert Fault Guides tell you the common Audi A4 faults and wear items that can become problems and big bills for their owner.

Independent research indicated that using our fault guides to check a car before you buy it can save you an average of £300 in surprise bills and hidden problems.

That's because our Audi A4 fault guides are written so that anyone can understand them – even if you know nothing about cars and have no tools. For every common fault, we tell you what to look for, what it means and what it costs.

Select your Audi A4 fault guide:

Audi A4 (1995 - 2004) Fault Guide
Audi A4 (2005-2008) Fault Guide
Audi A4 (2008-) Fault Guide


Audi A4 (1995 - 2004) Fault Guide

View Audi A4 (1995 - 2004) Fault Guide

We know of 18 AUDI A4 (1995 - 2004) faults which our fault check guide makes it easy for you to spot and avoid.

  • 6 engine faults
  • 2 suspension wear items or faults
  • 2 interior problems
  • 1 bodywork issues
  • 7 recalls

Here's an example fault on the AUDI A4 (1995 - 2004)

What to look for:

Check the paperwork to see if the cam belt has been changed on schedule. On most engines the cam belt must be changed within 110,000 miles. However, many garages recommend that bearings and pulleys can fail at 80,000 so we recommend changing all these parts at 75,000 miles.

What it means:

If the cam belt and associated parts (such as tensioner, pulleys, auxiliary belt, pump belt and fan belt) have not been changed, and the mileage is over these boundaries, the cam belt is likely to fail soon and will cause expensive damage to the engine. Usually the engine has to be replaced or at least re-built.

What to do

Ensure that the cam belt is changed before the car is driven anywhere if it is coming close to its interval. Changing the belt will cost £220 - £400.


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Audi A4 (2005-2008) Fault Guide

View Audi A4 (2005-2008) Fault Guide

We know of 18 AUDI A4 (2005-2008) faults which our fault check guide makes it easy for you to spot and avoid.

  • 9 engine faults
  • 3 suspension wear items or faults
  • 3 interior problems
  • 2 bodywork issues
  • 1 recalls

Here's an example fault on the AUDI A4 (2005-2008)

What to look for:

Check the paperwork to see if the cam belt has been changed on schedule. On most of this vehicle’s engines the cam belt must be changed within 5 years or 80,000 miles. But check the precise internal of your engine in the handbook as they can vary.

What it means:

If the cam belt and associated parts have not been changed, and the mileage is over these boundaries, the cam belt is likely to fail soon. Usually the engine has to be replaced or at least re-built after a cam belt failure.

What to do

Ensure that the cam belt is changed before the car is driven anywhere if it is coming close to its interval. Changing the belt should cost up to £500.


Register to have full access to the AUDI A4 (2005-2008) fault guide.

Registered users also get access to our regional price guides, cars for sale email alerts, and many other benefits to help you buy a safe, reliable used car at a great price.


Audi A4 (2008-) Fault Guide

View Audi A4 (2008-) Fault Guide

We know of 15 AUDI A4 (2008-) faults which our fault check guide makes it easy for you to spot and avoid.

  • 3 engine faults
  • 4 suspension wear items or faults
  • 6 interior problems
  • 1 bodywork issues
  • 1 recalls

Here's an example fault on the AUDI A4 (2008-)

What to look for:

Check the paperwork and mileage and mileage to make sure the car is not due an expensive cam belt service. The service is due at 75,000 miles or 5 years. It costs £500.00 for the petrol models and £700.00 for the 2.0 turbodiesel.

What it means:

If the car is due this service then you will have to budget for it. If the car has passed this mileage point without the service having been done then there is a high chance of damage to the engine.

What to do

If the car has passed this mileage point without the service having been done then it is advised to have the car inspected by a qualified mechanic. Otherwise try to reduce the price of the vehicle by the appropriate amount. If you buy the car and it has passed its cam belt schedule, then get the service completed before moving the vehicle.


Register to have full access to the AUDI A4 (2008-) fault guide.

Registered users also get access to our regional price guides, cars for sale email alerts, and many other benefits to help you buy a safe, reliable used car at a great price.


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