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.

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.
Age-Related Failure Trends
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. Minor lighting issues may cost around £50 to fix, while brake repairs typically range from £200 to £400. Suspension repairs, depending on the extent of the damage, can easily exceed £1,000. 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
Many Audi A6 owners on r/AudiA6 express satisfaction with the car’s overall performance and comfort. 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.
Reliability is a common theme among discussions, with some owners on r/CarTalkUK mentioning that newer models tend to be more reliable than older ones. 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.
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.
Frequently asked questions
What are the most common MOT failures for the Audi A6?
The most common failures include brakes, suspension, lighting, and emissions.
How does the age of the Audi A6 affect its MOT failure rates?
Older models tend to have higher failure rates, particularly those over 10 years old.
What are typical costs for fixing common MOT failures?
Costs can range from £50 for lighting issues to over £1,000 for suspension repairs.
Are there quick fixes for Audi A6 MOT failures?
Yes, issues like bulb replacements are quick fixes, while structural problems may require more extensive work.
Is the Audi A6 a reliable car?
The Audi A6 generally has a good reputation for reliability, but some models have reported issues, especially as they age.
What year A6 to stay away from?
Many buyers suggest avoiding the 2011-2013 models due to reported electrical issues and high repair costs.
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.
Is the Audi A6 worth buying?
The Audi A6 is often considered worth buying for its luxury features, performance, and comfort, but potential buyers should be aware of common issues.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.