Buying guide
Buying a used Audi A6: what to check before you hand over cash
A checklist for inspecting a used Audi A6. Engine, gearbox, electrics, paperwork, and what a Honest Car Check report tells you.
Updated 25th August 2026 DVSA data: Across 121,366 recorded MOT tests, 16.6% failed.

More on the Audi A6
TL;DR
The Audi A6 is a reliable executive car, but thorough inspection before purchase is crucial. Key checks include verifying paperwork, inspecting bodywork, assessing engine performance, and reviewing MOT history. Regular maintenance is essential for longevity, and potential buyers should be aware of common issues and maintenance costs.
Paperwork
Start by checking the V5C registration document. Ensure the name on the document matches the seller’s ID. A complete service history indicates good maintenance. Request any receipts for work done, especially for major repairs.
Bodywork
Inspect the bodywork for signs of rust, dents, or mismatched paint. Pay attention to the wheel arches, sills, and undercarriage. Look for any signs of previous accidents, such as uneven gaps between panels.
Engine Cold-Start
When starting the engine cold, listen for any unusual noises. A healthy engine should start smoothly without excessive cranking. Check for smoke from the exhaust; blue smoke may indicate oil burning, while black smoke can suggest fuel issues.
Test Drive Checklist
During the test drive, assess acceleration and braking. The car should feel responsive without any strange noises. Test the steering for any vibrations or pulling to one side. Listen for any unusual sounds from the suspension over bumps.
Gearbox
Whether manual or automatic, the gearbox should shift smoothly. In a manual, check that the clutch engages and disengages without slipping. For automatics, ensure smooth transitions between gears without harsh engagement.
Electrics
Check all electrical components, including lights, windows, and infotainment systems. Faulty electrics can be costly to repair. Ensure the air conditioning works effectively and listen for any unusual sounds from the stereo.
MOT History
Review the MOT history for advisories and failures. This history can reveal recurring issues and help gauge the car’s condition. A clean MOT history is a positive sign.
Use Honest Car Check to verify mileage and MOT history. This service can provide you with a comprehensive report on the vehicle’s background, helping you decide with confidence.
What people are asking
Is the Audi A6 a reliable car?
The Audi A6 is generally regarded as a reliable vehicle, particularly when it has been well maintained. Many owners report that with regular servicing, the A6 can perform well for many years without major issues.
What year A6 to stay away from?
Buyers often advise steering clear of the 2011 and 2012 models due to reports of electrical problems and issues with the diesel engines. It’s best to research specific vehicles and their service history before making a purchase.
Is the Audi A6 expensive to maintain?
Maintenance costs for the Audi A6 can be higher than average, especially for luxury models. Owners have noted that parts and servicing can be costly, so it is advisable to budget accordingly if you are considering this vehicle.
Is the Audi A6 worth buying?
Many buyers find the Audi A6 to be a worthwhile investment due to its comfort, performance, and features. However, it is essential to consider the specific model year and its maintenance history to ensure you are making a sound purchase.
What owners say
Common faults reported by owners include oil leaks and suspension wear, particularly in models from 2011 to 2013. Discussions indicate that while many owners have enjoyed their A6s, they have also faced challenges with the air conditioning systems and electronic features, which can be expensive to repair.
In terms of value, buyers in UK communities often mention that the A6 can be a good deal if purchased at the right price, especially for models that have been well maintained. However, some caution against the 2.0 TDI engines due to potential issues with oil consumption, as noted by users.
Overall, the consensus among owners is that the Audi A6 is a solid choice for those looking for a luxury vehicle, but they recommend thorough inspections and checking service histories to avoid potential pitfalls. Many also advise prospective buyers to be aware of the higher running costs associated with this model, as highlighted in discussions across various forums.
Audi A6 recall record
35 recalls have been issued for the Audi A6, between 1997 and 2025.
Belt buckle rivet missing
R/2025/508Issued 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
Software update for battery control unit
R/2025/463Issued 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
Replacing front seat belt
R/2025/426Issued 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
Stop-drive TAKATA PSAN
R/2025/387Issued 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.
| Registered | Tests | Failed | Median mileage |
|---|---|---|---|
| 2024 | 329 | 3.3% | 33,847 mi |
| 2023 | 608 | 3.1% | 55,817 mi |
| 2022 | 3,966 | 8.2% | 30,189 mi |
| 2021 | 4,455 | 7.7% | 40,064 mi |
| 2020 | 3,388 | 8.4% | 49,548 mi |
| 2019 | 8,644 | 10.3% | 60,090 mi |
| 2018 | 8,026 | 12.3% | 67,943 mi |
| 2017 | 9,160 | 12.6% | 80,094 mi |
Most common reasons for failure
- Tyre tread depth not in accordance with the requirements34.0%
- A suspension pin, bush or joint excessively worn31.6%
- A tyre seriously damaged16.1%
- a brake lining or pad worn below 1.5mm9.9%
- 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
What are the running costs of an Audi A6?
The running costs of an Audi A6 can be relatively high due to factors like fuel consumption, insurance premiums, and maintenance expenses. It's important to consider these costs alongside the purchase price to ensure it fits your budget.
How does the Audi A6 compare to other executive cars?
The Audi A6 is often praised for its blend of luxury, performance, and technology, making it a strong competitor in the executive car segment. However, buyers should compare it with rivals like the BMW 5 Series and Mercedes-Benz E-Class to find the best fit for their needs.
Sources
- DVSA anonymised MOT tests and results (Open Government Licence v3.0)
- VCA new car fuel consumption and emissions data (Open Government Licence v3.0)
- DVSA vehicle safety recalls (Open Government Licence v3.0)