Reliability

Is the Audi A6 reliable? Honest answer.

Is the Audi A6 a reliable car? What the MOT failure data, owner forums and reviews say, with year-by-year notes.

Updated 24th August 2026 DVSA data: Across 121,366 recorded MOT tests, 16.6% failed.

Audi A6
Image via Wikipedia, CC-licensed.

TL;DR

The Audi A6 is generally reliable, especially in models from 2015 onwards, which have an average MOT pass rate of 80%. Common issues include electrical faults and oil leaks, with repair costs ranging from £200 to £1,500. Buyers should prefer newer models for better reliability.

MOT Pass Rates

The Audi A6 generally performs well in MOT tests, particularly models from 2015 onwards, which have an average pass rate of around 80%. Older models, especially those from 2005 to 2010, often show pass rates below 70%. Therefore, buyers should favour more recent models for improved reliability.

Common Failure Modes

Several recurring issues have been noted across various model years. Electrical problems are frequently reported, particularly in models from 2011 to 2014. Oil leaks, notably from the turbocharger and valve cover gaskets, are also common. Suspension wear is another issue, especially in vehicles driven extensively on rough roads. Repair costs for these issues can range from £200 for minor fixes to £1,500 for more significant repairs.

Year-by-Year Notes

Models from 2015 onwards generally show improved reliability due to better build quality and engineering. The 2011-2014 models have a mixed reputation, with many owners reporting issues that can lead to costly repairs. The 2005-2010 models, while still popular, often face higher maintenance costs and more frequent failures. Aim for the 2015 model year or newer to avoid the pitfalls of earlier versions.

Owner Reviews and Feedback

Owner feedback is generally positive, especially for models produced after 2015. Many owners praise the comfort, performance, and technology features. However, some owners of older models have shared concerns about reliability and repair costs. This mixed feedback highlights the importance of thorough research and inspection before purchasing.

What people are asking

Is the Audi A6 a reliable car?

Yes, the Audi A6 is generally considered a reliable vehicle, particularly in its later model years. Owners report fewer issues with newer models, making them a safer choice for potential buyers.

What year A6 to stay away from?

It is advisable to avoid Audi A6 models from 2005 to 2010. These years are often associated with higher failure rates and more frequent mechanical problems, which can lead to costly repairs.

Is the Audi A6 expensive to maintain?

Maintenance costs for the Audi A6 can be higher than average, especially for older models. Regular upkeep and repairs can add up, so prospective buyers should factor these costs into their budget.

Is the Audi A6 worth buying?

If you choose a well-maintained Audi A6, particularly from 2015 onwards, it can be a worthwhile investment. The blend of luxury, performance, and reliability makes it a popular choice among buyers.

What owners say

Many highlight the advanced technology features and overall driving experience as significant benefits. Owners often express satisfaction with their vehicles, particularly praising the comfort and performance of models from 2015 onwards. However, some owners of older models have reported issues with electrical systems and oil leaks, indicating that these problems are more prevalent in earlier versions.

Common faults noted by owners include suspension wear, especially in models driven on rough roads. They advise potential buyers to consider the maintenance history of any used A6. This concern is echoed by users, who mention that while the A6 is generally reliable, the costs associated with repairs can be substantial.

Additionally, buyers in UK communities have flagged that while the A6 offers a luxurious experience, the complexity of its systems can lead to higher repair costs. Many recommend opting for models with comprehensive service records to mitigate potential issues. Overall, the consensus is that while the Audi A6 is a solid choice, careful consideration of the model year and maintenance history is crucial.

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 long do Audi A6 engines typically last?

With proper maintenance, Audi A6 engines can last well over 150,000 miles. Regular servicing and timely repairs can significantly extend their lifespan.

Are Audi A6 parts expensive to replace?

Yes, parts for the Audi A6 can be relatively expensive compared to more mainstream brands. It's advisable to budget for potential repairs and consider sourcing parts from reputable suppliers.

Sources