MOT failure rates

Audi A6 MOT failure rates: what fails, what to fix

What the DVSA MOT data shows for the Audi A6. The most common failure categories and what each one typically costs to put right.

Updated 4th September 2026 DVSA data: Across 121,366 recorded MOT tests, 16.6% failed.

Audi A6
Image via Wikipedia, CC-licensed.

TL;DR

The Audi A6 faces common MOT issues, particularly with brakes, suspension, lighting, and emissions. Older models, especially those over 10 years, have higher failure rates. Repair costs vary, with minor fixes around £50 and suspension repairs exceeding £1,000. Regular maintenance is essential to mitigate these problems.

Common MOT Failure Categories

The most frequent MOT failure categories for the Audi A6 include brakes, suspension, lighting, and emissions. Brakes often fail due to worn pads or discs, while suspension issues can arise from worn bushings or shock absorbers. Lighting failures, such as defective bulbs, are also common and relatively easy to fix. Emissions failures are typically linked to issues with the exhaust system or engine management.

As the Audi A6 ages, its MOT failure rates tend to increase. Models over 10 years old often show a significant rise in failures, particularly in the suspension and emissions categories. Regular maintenance can help mitigate these issues, but older vehicles may require more extensive repairs.

Cost of Common Repairs

Repair costs for common MOT failures can vary widely. Emissions-related repairs can also be costly, particularly if they involve replacing parts of the exhaust system.

Quick Fixes vs Structural Issues

Many MOT failures can be addressed with quick fixes. Replacing a blown bulb or worn brake pads can often be done in a short time. However, structural issues, such as those affecting the chassis or major suspension components, require more time and money to resolve. It’s crucial for owners to regularly inspect their vehicles to catch minor issues before they become major problems.

What people are asking

Is the Audi A6 a reliable car?

The Audi A6 generally has a good reputation for reliability, especially in newer models. However, some owners have reported issues with older models, particularly concerning electrical systems and engine performance.

What year A6 to stay away from?

Many buyers suggest avoiding the 2011-2013 models due to reported electrical issues and high repair costs. These years have been flagged for problems that could lead to expensive fixes.

Is the Audi A6 expensive to maintain?

Maintenance costs can be higher than average, especially for older models, due to the complexity of parts and labour. Regular servicing is essential to keep costs manageable, but some owners find the expenses can add up quickly.

Is the Audi A6 worth buying?

The Audi A6 is often considered worth buying for its luxury features, performance, and comfort. However, potential buyers should be aware of common issues and ensure they have a budget for maintenance.

What owners say

They appreciate the luxurious interior and smooth driving experience, making it a popular choice among executive cars. However, some owners have noted that while the car is enjoyable to drive, it can be costly to maintain, particularly as it ages. Many Audi A6 owners express satisfaction with the car’s overall performance and comfort.

However, issues such as excessive oil consumption and electrical problems have been reported, especially in certain years. This has led some buyers to advise caution when selecting a model. Reliability is a common theme among discussions, with some owners mentioning that newer models tend to be more reliable than older ones.

Common faults highlighted by owners include suspension wear and emissions-related issues. Many have shared experiences of needing to replace suspension components after a few years of use, which can be quite costly. Additionally, issues with the exhaust system have been flagged, particularly in diesel models, which can lead to expensive repairs.

Value retention is another topic of discussion, with users noting that while the Audi A6 can be a worthwhile investment, its resale value can fluctuate significantly based on condition and mileage. Buyers in UK communities have flagged that maintaining a full service history can help preserve value, making it crucial for owners to keep up with regular maintenance.

Overall, while the Audi A6 is praised for its comfort and performance, potential buyers and current owners should be aware of the common issues and maintenance costs associated with this vehicle.

Audi A6 recall record

35 recalls have been issued for the Audi A6, between 1997 and 2025.

  1. Belt buckle rivet missing

    R/2025/508

    Issued 14 November 2025

    On affected vehicles an important connection in the seat belt buckle may not have been produced correctly during the assembly process.

    Remedy:The belt buckles on both front seats (left and right) must be replaced.

    Affects cars built Mar 2025 to Apr 2025

  2. Software update for battery control unit

    R/2025/463

    Issued 24 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 2021 to Jun 2024

  3. Replacing front seat belt

    R/2025/426

    Issued 30 September 2025

    On affected vehicles a sub-component of the belt force limiter in the front seat belt retractors may be damaged. Either one or both front seat belt retractors may be affected.

    Remedy:Replace the affected seat belts.

    Affects cars built Jul 2025 to Jul 2025

  4. Stop-drive TAKATA PSAN

    R/2025/387

    Issued 8 August 2025

    Urgent Safety Warning – Do Not Drive Your Vehicle Affected vehicles were originally allocated to or used for an extended period of time in a region with a climate zone considered to as HIGH RISK. Certain front airbags contain an ageing inflator propellant that may explode when deployed due to long-term exposure to heat and humidity. If the airbag inflator explodes metal fragments may be ejected causing life-threatening or fatal injuries to anyone in the vehicle.

    Remedy:Affected airbags will be be replaced. You can contact Audi's dedicated Takata Stop Drive helpline at 0113 526 9646 (MONDAY to FRIDAY 9:00AM to 5:00PM.

    Affects cars built Jul 2004 to Dec 2010

31 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 A6 MOT record

From 121,366 recorded MOT tests, 16.6% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20243293.3%33,847 mi
20236083.1%55,817 mi
20223,9668.2%30,189 mi
20214,4557.7%40,064 mi
20203,3888.4%49,548 mi
20198,64410.3%60,090 mi
20188,02612.3%67,943 mi
20179,16012.6%80,094 mi

Most common reasons for failure

  1. Tyre tread depth not in accordance with the requirements34.0%
  2. A suspension pin, bush or joint excessively worn31.6%
  3. A tyre seriously damaged16.1%
  4. a brake lining or pad worn below 1.5mm9.9%
  5. Brake disc or drum excessively weakened, insecure or fractured8.4%

Figures cover every Audi A6 tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Audi A6 official figures

Median across 35 variants on sale, diesel electric, electricity, electricity / petrol, petrol, petrol electric.

Combined economy
39.8 mpg
WLTP median across variants
CO2 emissions
164.5 g/km
Sets the first-year tax rate
Electric range
401 miles
Manufacturer WLTP figure

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

Frequently asked questions

How often does the Audi A6 need servicing?

The Audi A6 typically requires servicing every 12 months or 10,000 miles, whichever comes first. Regular maintenance is crucial to keep the vehicle running smoothly and to prevent potential issues.

What is the fuel economy of the Audi A6?

The fuel economy of the Audi A6 varies depending on the engine type and driving conditions, but many models offer a decent balance of performance and efficiency. Generally, you can expect around 40 to 60 miles per gallon, depending on the variant.

Sources