Audi A6 Reliability, MOT Pass Rate & Common Faults
Free Audi A6 car check
Is the Audi A6 reliable? We analysed 2,724,792 real MOT tests across 249,374 vehicles to find out.
Got a specific Audi A6? Enter the reg for a free check:
The Audi A6 is above average for reliability based on real UK MOT data. Common problems include tyre tread depth below requirements of 1.6mm, constant velocity joint gaiter split and position lamp(s) not working. Here's everything you need to know before buying a used Audi A6.
Audi A6 Number Plates
Number plates registered to a Audi A6. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Audi A6 MOT Pass Rate by Year
How likely is a Audi A6 to pass its MOT? Here's the pass rate for each registration year, newest first.
Audi A6 Problems — What Goes Wrong?
The most common reasons a Audi A6 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Audi A6 Common Faults & Problems
These are the most common serious faults found on Audi A6 models during MOT testing — flagged as dangerous or major failures that need immediate attention.
Audi A6 Mileage — What's Normal?
How many miles does a typical Audi A6 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Audi A6 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Audi A6 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2021 | 2,445 | 90.9% | 28,298 | 38,565 | 52,875 |
| 2020 | 6,677 | 91.0% | 27,167 | 38,953 | 55,584 |
| 2019 | 42,050 | 90.1% | 31,092 | 45,415 | 63,402 |
| 2018 | 52,554 | 89.3% | 33,396 | 49,153 | 69,176 |
| 2017 | 75,745 | 89.2% | 38,575 | 56,735 | 79,656 |
| 2016 | 119,796 | 88.0% | 43,180 | 63,296 | 88,177 |
| 2015 | 118,322 | 87.7% | 48,583 | 71,510 | 98,747 |
| 2014 | 128,525 | 86.0% | 51,899 | 76,371 | 105,265 |
| 2013 | 141,388 | 85.8% | 54,083 | 80,698 | 111,435 |
| 2012 | 126,151 | 85.1% | 58,946 | 88,066 | 120,777 |
| 2011 | 123,024 | 82.3% | 63,705 | 94,878 | 129,664 |
| 2010 | 132,326 | 80.5% | 66,928 | 99,854 | 136,893 |
| 2009 | 103,120 | 79.0% | 70,246 | 104,062 | 142,578 |
| 2008 | 176,289 | 77.8% | 71,980 | 106,509 | 143,781 |
| 2007 | 217,974 | 78.1% | 75,109 | 110,176 | 147,822 |
| 2006 | 165,966 | 78.1% | 75,614 | 111,558 | 150,044 |
| 2005 | 148,332 | 76.6% | 75,384 | 109,797 | 147,399 |
| 2004 | 122,119 | 73.6% | 73,910 | 108,053 | 145,910 |
| 2003 | 122,150 | 72.2% | 76,055 | 108,650 | 145,865 |
| 2002 | 127,817 | 71.0% | 83,728 | 115,166 | 150,252 |
How Long Does a Audi A6 Last?
Based on 249,374 Audi A6 vehicles on UK roads.
Audi A6 Mileage Distribution
Total mileage recorded across all Audi A6 MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Audi A6
Based on MOT pass rates across all registration years with sufficient test data.
91.0% MOT pass rate from 6,677 tests
65.1% MOT pass rate from 70,387 tests
The best year to buy a used Audi A6 is 2020, which has the highest MOT pass rate at 91.0% across 6,677 tests. The 1998 model year has the lowest pass rate at 65.1% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Audi A6 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Audi A6 THIS CAR | 78.4% | 2,724,792 | 98,890 mi | 31 yrs |
| Audi A3 | 78% | 7,415,025 | 78,776 mi | 29 yrs |
| Audi A4 | 76.1% | 7,096,957 | 96,834 mi | 31 yrs |
| Audi Tt | 78.1% | 2,336,395 | 68,729 mi | 27 yrs |
| Volkswagen Sharan | 72.1% | 1,070,633 | 99,516 mi | 30 yrs |
Compared to the Audi A3 (78.0% pass rate) and the Audi A4 (76.1% pass rate), the Audi A6 outperforms both on MOT reliability.
Found a Audi A6 you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Audi A6Should you buy a used Audi A6?
The Audi A6 has an overall MOT pass rate of 78.4% across 2,724,792 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Audi A6 are tyre tread depth below requirements of 1.6mm (72,312 recorded failures), constant velocity joint gaiter split (48,430), and position lamp(s) not working (25,884). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
On the safety side, the most frequently flagged dangerous fault is tyre tread depth below requirements of 1.6mm. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a Audi A6 with an expired or recently passed MOT, ask the seller whether any dangerous faults were found and fixed during the last test.
A typical Audi A6 owner drives around 8,511 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Audi A6 models stay on UK roads for around 31 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.