AUDI A6 (2018)
Running costs, common problems, and reliability data based on 16,546 real MOT tests in 2024.
MOT Pass Rate
92%
Total Tests (2024)
16,546
Avg Mileage
62,634 mi
Est. Annual Cost
£1,772
Is the 2018 AUDI A6 reliable?
Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%.
At 6 years old, 92% of AUDI A6s from 2018 passed their MOT first time in 2024. That's based on 16,546 tests across the UK. The average mileage at this age is 62,634 miles.
How does the 2018 AUDI A6 compare?
Mileage Analysis
The average 2018 AUDI A6 has 62,634 miles on the clock, which is above the expected 44,400 miles for a 6-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a AUDI A6?
The most reliable year is the 2020 model with a 94% MOT pass rate, while the 1997 model has the lowest at 71%. The 2018 sits between the two at 92%.
How much does a 2018 AUDI A6 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
AUDI A6 by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 93% | 2,105 | 36,146 mi |
| 2020 | 94% | 3,470 | 42,761 mi |
| 2019 | 92% | 16,657 | 54,594 mi |
| 2018 | 92% | 16,546 | 62,634 mi |
| 2017 | 91% | 19,296 | 75,408 mi |
| 2016 | 89% | 26,437 | 85,249 mi |
| 2015 | 89% | 22,966 | 96,950 mi |
| 2014 | 88% | 21,808 | 106,355 mi |
| 2013 | 87% | 20,882 | 115,551 mi |
| 2012 | 86% | 16,143 | 125,550 mi |
| 2011 | 82% | 13,126 | 135,985 mi |
| 2010 | 81% | 12,471 | 143,668 mi |
| 2009 | 81% | 8,341 | 150,654 mi |
| 2008 | 80% | 11,124 | 156,627 mi |
| 2007 | 79% | 10,782 | 162,839 mi |
| 2006 | 78% | 6,542 | 165,663 mi |
| 2005 | 78% | 3,534 | 163,283 mi |
| 2004 | 75% | 2,156 | 155,383 mi |
| 2003 | 74% | 1,408 | 153,657 mi |
| 2002 | 73% | 771 | 164,916 mi |
| 2001 | 78% | 356 | 157,216 mi |
| 2000 | 75% | 389 | 150,802 mi |
| 1999 | 73% | 410 | 157,368 mi |
| 1998 | 76% | 222 | 151,701 mi |
| 1997 | 71% | 215 | 176,094 mi |
| 1996 | 78% | 316 | 189,126 mi |
| 1995 | 76% | 136 | 162,842 mi |
| 1994 | 81% | 53 | 140,857 mi |
Checking a specific AUDI A6?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 AUDI A6
The 2018 AUDI A6 is a premium with a 1798cc petrol engine. 16,546 of these vehicles were MOT tested in 2024, making it one of the most commonly tested cars on UK roads. Among all cars from 2018, the average MOT pass rate is 89%, and this model beats that benchmark.
With an average of 62,634 miles at 6 years old, AUDI A6 owners cover more miles than the average driver.
2018 AUDI A6 Fuel Costs
The 1798cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 AUDI A6?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
AUDI A6 Reliability Trend
Newer AUDI A6s show better MOT pass rates than older ones, with an average improvement of 11 percentage points.
Buying a Used 2018 AUDI A6
At 6 years old, the AUDI A6 offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2020 model has the highest pass rate at 94%. With 16,546 MOT tests in our data, there's strong statistical confidence in these figures.
Alternatives to the 2018 AUDI A6
The AUDI A6 is actually the most reliable option among similar petrol premiums from this era. Here are comparable petrol cars with similar engines:
- VAUXHALL CORSA (2016) 81% pass rate (-11%) from 133,045 tests
- FORD FOCUS (2016) 87% pass rate (-5%) from 109,880 tests
- VOLKSWAGEN GOLF (2019) 92% pass rate (same) from 89,653 tests
- VAUXHALL MOKKA (2016) 80% pass rate (-12%) from 70,238 tests