Audi A5 MOT failure rates: what to expect
What fails on a Audi A5 at MOT, how often, and what each fix typically costs.

The Audi A5 is a stylish and popular choice among UK drivers, but like any vehicle, it can face issues during its MOT. Common failures include problems with the suspension, brakes, and emissions system. Understanding these issues and their typical repair costs can help owners prepare for their MOT.
Suspension Issues
One of the most frequent reasons for an Audi A5 to fail its MOT is suspension problems. This can include worn-out shock absorbers or damaged suspension components. The cost to replace shock absorbers typically ranges from £300 to £600, depending on whether you choose OEM or aftermarket parts.
Suspension failures can lead to poor handling and increased tyre wear, making it essential to address these issues promptly. Regular checks can help identify wear and tear before the MOT, potentially saving on repair costs.
Brake System Failures
Brakes are critical for safety, and any issues can result in an MOT failure. Common problems include worn brake pads, damaged discs, or leaks in the brake lines. Replacing brake pads can cost between £100 and £300, while disc replacement may add another £150 to £400 to the bill.
Failing brakes not only jeopardise safety but can also lead to more extensive damage if not addressed. Regular maintenance and inspections can help ensure that the braking system remains in good condition, reducing the likelihood of MOT failures.
Emissions System Problems
The emissions system is another area where the Audi A5 can encounter issues, particularly with the diesel models. Common failures include faulty catalytic converters or issues with the exhaust gas recirculation (EGR) valve. Repairing or replacing a catalytic converter can cost between £500 and £1,200, depending on the model and parts used.
With increasing scrutiny on emissions, ensuring your vehicle meets the required standards is crucial. Regular servicing and checks can help identify potential emissions issues before the MOT, saving time and money.
Tyre Condition
Tyres are a vital part of vehicle safety and are a common reason for MOT failures. Issues such as insufficient tread depth, uneven wear, or damage can lead to a failed test. The cost of replacing tyres can vary widely, typically ranging from £50 to £150 per tyre, depending on the brand and size.
Maintaining proper tyre pressure and regularly inspecting tyres can help prolong their life and ensure safety. It is advisable to replace tyres that show signs of wear well before the MOT to avoid last-minute expenses.
Lighting and Electrical Failures
Another frequent MOT failure point for the Audi A5 is lighting and electrical systems. Common issues include blown bulbs, faulty indicators, or problems with the battery. Replacing a bulb can cost as little as £5, while more complex electrical repairs can run into hundreds of pounds.
Ensuring all lights are functioning correctly before the MOT can save time and hassle. Regular checks of the electrical system can help prevent unexpected failures during the test.
Bodywork and Structural Integrity
While less common, bodywork and structural integrity issues can also lead to MOT failures. This can include rust, corrosion, or damage to the chassis. Repair costs can vary significantly, from a few hundred pounds for minor rust treatment to over £1,000 for major structural repairs.
Keeping the bodywork in good condition not only helps with MOT compliance but also maintains the vehicle’s resale value. Regular cleaning and protective treatments can help prevent rust and other issues from developing.
Frequently asked questions
What is the MOT requirement for an Audi A5 in the UK?
In the UK, an Audi A5 must have an MOT test when it is three years old and then annually thereafter. This ensures that the vehicle meets safety and environmental standards.
How can I check the MOT history of an Audi A5?
You can check the MOT history of an Audi A5 by visiting the official UK government website. You will need the vehicle's registration number and the make to access the details.
What common issues might an Audi A5 face during its MOT?
Common issues that may arise during an MOT for an Audi A5 include worn brake pads, faulty lights, and emissions failures. Regular maintenance can help prevent these problems.
How much does an MOT test cost for an Audi A5?
The cost of an MOT test for an Audi A5 can vary depending on the garage, but it typically ranges from £30 to £50. It's best to shop around for the best price.
What should I do if my Audi A5 fails its MOT?
If your Audi A5 fails its MOT, you will receive a list of issues that need addressing. You can either repair the vehicle and retest it or appeal the decision if you believe it was incorrect.
Can I drive my Audi A5 if it has an expired MOT?
No, you cannot legally drive your Audi A5 if it has an expired MOT unless you are taking it to a pre-booked MOT appointment. Driving without a valid MOT can result in fines.
How can I prepare my Audi A5 for its MOT?
To prepare your Audi A5 for its MOT, check the lights, tyres, and brakes, and ensure that all fluids are topped up. A thorough inspection can help identify potential issues before the test.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.