Audi A7 MOT failure rates: what to expect
What fails on a Audi A7 at MOT, how often, and what each fix typically costs.

The Audi A7 is a stylish and luxurious vehicle, but like any car, it can encounter issues that lead to MOT failures. Common problems include issues with the suspension, brakes, and emissions system. Understanding these potential failures and their typical repair costs can help owners maintain their vehicle effectively.
Suspension Problems
One of the most frequent MOT failures for the Audi A7 relates to the suspension system. Worn shock absorbers or damaged suspension components can lead to a bumpy ride and poor handling. If the suspension fails the MOT, it often requires replacement parts.
Replacing shock absorbers can cost around £300 to £600, depending on whether you opt for original or aftermarket parts. Additionally, if components like control arms or bushes are worn, they may need to be replaced as well, which could add another £200 to £400 to the repair bill. Regular checks can help identify these issues before the MOT.
Brake System Failures
The brake system is crucial for safety and is a common area of concern during MOT tests. The Audi A7 may experience issues such as worn brake pads, damaged discs, or leaks in the brake lines. Any of these problems can lead to a failure.
Replacing brake pads typically costs between £100 and £250, while brake discs can range from £150 to £300 for a full set. If there are leaks in the brake lines, repairs can vary widely based on the extent of the damage, often costing £100 to £300. Ensuring that the brakes are regularly serviced can prevent these issues from arising.
Emissions System Issues
Emissions failures are increasingly common in modern vehicles, including the Audi A7. Problems with the exhaust system, such as a faulty catalytic converter or issues with the oxygen sensors, can lead to a failed MOT due to excessive emissions.
Replacing a catalytic converter can be quite expensive, often costing between £500 and £1,200, depending on the model year and engine type. Oxygen sensor replacements are generally more affordable, ranging from £100 to £200. Regular servicing of the emissions system can help keep the vehicle compliant with environmental standards.
Tyre Condition and Tread Depth
Tyres are a critical safety feature and a common reason for MOT failures. The Audi A7, being a performance vehicle, requires tyres that meet specific standards for tread depth and condition. Tyres with insufficient tread or visible damage will fail the test.
To pass the MOT, tyres must have a minimum tread depth of 1.6mm across the central three-quarters of the tyre. Replacing tyres can cost anywhere from £100 to £300 each, depending on the brand and performance specifications. Regularly checking tyre condition and replacing them as needed can help avoid MOT failures.
Lighting and Electrical Failures
Another frequent area of concern during the MOT for the Audi A7 is the lighting system. Issues can arise from blown bulbs, faulty wiring, or malfunctioning electronic components. These problems are often straightforward to fix but can lead to a failed MOT if not addressed.
Replacing a blown bulb is usually a simple task that can cost as little as £10 to £20. However, if there are more significant electrical issues, repairs can escalate to £100 or more, depending on the complexity. Regularly inspecting the lighting system can help ensure all components are functioning correctly.
Bodywork and Structural Integrity
While less common, bodywork and structural integrity issues can also lead to MOT failures. Problems such as excessive corrosion, particularly in older models, or damage to critical structural components can be serious.
Repairing bodywork can vary widely in cost, depending on the extent of the damage. Minor repairs might cost around £150 to £300, while more extensive rust treatment or structural repairs can reach £1,000 or more. Regular inspections can help identify potential issues before they become serious problems.
Maintaining your Audi A7 and being aware of these common MOT failures can save you time and money. Regular servicing and checks can help ensure your vehicle remains in good condition, reducing the likelihood of unexpected repairs and MOT failures.
Frequently asked questions
What is an Audi A7 MOT?
An Audi A7 MOT is an annual test required by law to ensure that the vehicle meets safety and environmental standards. It checks various components, including brakes, lights, and emissions.
How often does my Audi A7 need an MOT?
Your Audi A7 needs an MOT once a year if it is three years old or older. It is important to keep track of the expiry date to avoid fines.
What happens if my Audi A7 fails the MOT?
If your Audi A7 fails the MOT, you will receive a list of issues that need to be fixed. You must address these problems and have the vehicle retested before it can be legally driven.
Can I drive my Audi A7 if the MOT has expired?
No, you cannot legally drive your Audi A7 if the MOT has expired, unless you are driving it to a pre-booked MOT appointment. Driving without a valid MOT can result in fines and penalties.
How can I prepare my Audi A7 for its MOT?
To prepare your Audi A7 for its MOT, check the lights, brakes, and tyres. It is also a good idea to ensure that the windscreen wipers and washers are functioning properly.
Where can I get an MOT for my Audi A7?
You can get an MOT for your Audi A7 at any authorised MOT testing centre. Many garages offer this service, so it is advisable to compare prices and reviews.
What documents do I need for my Audi A7 MOT?
You should bring your driving licence and the vehicle registration document to the MOT appointment. It is also helpful to have any previous MOT certificates.
How long does an Audi A7 MOT take?
An MOT test typically takes about 45 minutes to an hour. However, it may take longer if repairs are needed or if the garage is busy.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.