MOT failure rates

Audi A8 MOT failure rates: what to expect

What fails on a Audi A8 at MOT, how often, and what each fix typically costs.

Updated 4th September 2026 DVSA data: Across 10,012 recorded MOT tests, 9.6% failed.

Audi A8
Image via Wikipedia, CC-licensed.

The Audi A8 is a luxury vehicle that offers comfort and performance, but like any car, it can encounter issues that lead to MOT failures. Common problems include suspension wear, lighting failures, and emissions issues. Understanding these can help owners prepare for repairs and costs.

Suspension Issues

One of the most frequent causes of MOT failures for the Audi A8 is suspension problems. The vehicle’s complex air suspension system can develop faults over time, leading to uneven ride height and compromised handling.

Common issues include worn air struts or leaks in the air suspension system. Regular maintenance and inspections can help catch these problems early, potentially saving on more extensive repairs later.

Lighting Failures

Lighting failures are another common reason for MOT failures in the Audi A8. This can include issues with headlights, brake lights, and indicators. Given the advanced lighting technology in modern Audis, these problems can sometimes be more complex than simply replacing a bulb.

Emissions Problems

Emissions failures are a significant concern for many vehicles, including the Audi A8. The vehicle must meet specific emissions standards, and any failure can result from issues with the exhaust system, catalytic converter, or engine management system.

Regular servicing and using quality fuel can help maintain the emissions system, reducing the likelihood of failure during the MOT.

Brake System Failures

The brake system is crucial for safety, and any issues can lead to an MOT failure. Common problems include worn brake pads, discs, or issues with the brake lines. The Audi A8’s braking system is sophisticated, and any faults can affect performance significantly.

Regular checks and timely replacements can help ensure the brake system remains in good condition.

Tyre Condition

Tyres are essential for safety and performance, and their condition is a common area of failure during the MOT. The Audi A8 requires tyres that meet specific standards for tread depth and overall condition.

Exhaust System Issues

The exhaust system is another critical area that can lead to MOT failures in the Audi A8. Common problems include leaks, rust, or damage to the exhaust components. A faulty exhaust can lead to increased emissions and noise, both of which are checked during the MOT.

Regular inspections can help identify issues early, potentially avoiding more costly repairs down the line.

By being aware of these common MOT failures and their associated costs, Audi A8 owners can take proactive steps to maintain their vehicles and ensure they pass their MOTs with minimal hassle. Regular servicing and attention to detail can go a long way in preventing these issues from arising.

Audi A8 recall record

24 recalls have been issued for the Audi A8, between 1996 and 2025.

  1. Software update for battery control unit

    R/2025/441

    Issued 10 October 2025

    On affected vehicles there may be defective battery modules which may result in a fire hazard when charging the high-voltage battery.

    Remedy:Update the software of the high-voltage battery to improve the self-diagnosis capabilities. Vehicle owners are advised to not charge the high-voltage battery using external charging sources and also not use the e-tron modes “Battery charge” and “Battery hold” until the update is applied.

    Affects cars built Feb 2022 to Dec 2023

  2. Replacing front suspension link

    R/2024/310

    Issued 19 July 2024

    A suspension link on the front axle that has invisible cracks may have been fitted to your vehicle. This possible damage means the service life of the suspension link can no longer be guaranteed and the component may fail. A failure particularly at higher speeds may result in vehicle behaviour that is difficult to control.

    Remedy:For safety reasons it is necessary to replace the front upper left suspension link

    Affects cars built May 2024 to Jun 2024

  3. THE MESH SIZE OF THE OIL STRAINER IN THE OIL SUPPLY FOR BOTH TURBOCHARGERS IS TOO SMALL

    R/2022/132

    Issued 4 May 2022

    The mesh size of the oil strainer in the oil supply for both turbochargers is too small.

    Remedy:The oil strainer will be replaced with a revised version with a larger mesh size.

    Affects cars built May 2012 to Mar 2017

  4. FOLLOWING A PREVIOUS CAMPAIGN THE TOE AND/OR CAMBER VALUES ON THE REAR AXLE MAY IN CERTAIN CIRCUMSTANCES INCORRECTLY BE CHANGED WITHOUT THIS BEING NOTICED

    R/2022/036

    Issued 14 February 2022

    Following a previous campaign the toe and/or camber values on the rear axle may in certain circumstances incorrectly be changed without this being noticed.

    Remedy:The wheel alignment must be checked and if necessary the suspension must be serviced on the affected vehicles.

    Affects cars built Nov 2019 to Feb 2021

20 older recalls not shown.

A recall applies to a build range, not to every car of this model. Check a registration to see whether one specific vehicle has an outstanding recall.

Audi A8 MOT record

From 10,012 recorded MOT tests, 9.6% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20212462.4%43,930 mi
20203876.7%48,655 mi
20197145.3%55,294 mi
20189487.2%62,937 mi
20176526.1%71,460 mi
20168798.0%78,459 mi
20159186.2%91,050 mi
20148417.6%101,544 mi

Most common reasons for failure

  1. A suspension pin, bush or joint excessively worn34.0%
  2. Tyre tread depth not in accordance with the requirements30.1%
  3. A tyre seriously damaged17.7%
  4. Brake disc or drum excessively weakened, insecure or fractured10.1%
  5. a brake lining or pad worn below 1.5mm8.1%

Figures cover every Audi A8 tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Audi A8 official figures

Median across 4 variants on sale, diesel electric, petrol electric.

Combined economy
33.9 mpg
WLTP median across variants
CO2 emissions
204 g/km
Sets the first-year tax rate

Official figures for new cars. Real economy varies with driving, load and conditions.

Frequently asked questions

What is an MOT for the Audi A8?

An MOT is a mandatory annual test that checks the safety and emissions of your Audi A8. It ensures that your vehicle meets UK road safety and environmental standards.

How often does my Audi A8 need an MOT?

Your Audi A8 needs an MOT test every 12 months once it is three years old. It is important to keep track of the expiry date to avoid penalties.

What are common reasons for an Audi A8 to fail its MOT?

Common reasons for an MOT failure include issues with brakes, lights, tyres, and emissions. Regular maintenance can help prevent these problems.

Can I drive my Audi A8 if it has failed its MOT?

You cannot legally drive your Audi A8 if it has failed its MOT unless you are taking it to a pre-booked appointment for repairs. Otherwise, you may face fines.

How can I prepare my Audi A8 for its MOT?

To prepare your Audi A8 for its MOT, check the lights, brakes, and tyres, and ensure that all fluids are topped up. It is also wise to have a professional inspection before the test.

What should I do if my Audi A8 is due for an MOT?

If your Audi A8 is due for an MOT, book an appointment with an authorised testing centre. Make sure to do this before the expiry date to avoid driving without a valid MOT.

How can I find a reliable MOT centre for my Audi A8?

You can find a reliable MOT centre by checking online reviews, asking for recommendations from friends, or using the official government website to locate approved centres near you.

What happens if I lose my Audi A8's MOT certificate?

If you lose your Audi A8's MOT certificate, you can request a replacement from the testing centre where the MOT was conducted. You can also check your MOT status online.

Sources