Audi A6 S Line TDI Ultra Reliability, MOT Pass Rate & Common Faults
Free Audi A6 S Line TDI Ultra car check
Is the Audi A6 S Line TDI Ultra reliable? We analysed 1,445 real MOT tests across 347 vehicles to find out.
Got a specific Audi A6 S Line TDI Ultra? Enter the reg for a free check:
The Audi A6 S Line TDI Ultra is above average for reliability based on real UK MOT data. Here's everything you need to know before buying a used Audi A6 S Line TDI Ultra.
Audi A6 S Line TDI Ultra Number Plates
Number plates registered to a Audi A6 S Line TDI Ultra. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Audi A6 S Line TDI Ultra Common Faults & Problems
These are the most common serious faults found on Audi A6 S Line TDI Ultra models during MOT testing — flagged as dangerous or major failures that need immediate attention.
Audi A6 S Line TDI Ultra Mileage — What's Normal?
How many miles does a typical Audi A6 S Line TDI Ultra owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Audi A6 S Line TDI Ultra Mileage Distribution
Total mileage recorded across all Audi A6 S Line TDI Ultra MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
How Does the Audi A6 S Line TDI Ultra Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Audi A6 S Line TDI Ultra THIS CAR | 92.9% | 1,445 | 86,476 mi | — 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 A6 | 78.4% | 2,724,792 | 98,890 mi | 31 yrs |
| Abarth 595 Scorpioneoro | 86.2% | 753 | 19,301 mi | — yrs |
Compared to the Audi A3 (78.0% pass rate) and the Audi A4 (76.1% pass rate), the Audi A6 S Line TDI Ultra outperforms both on MOT reliability.
Found a Audi A6 S Line TDI Ultra 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 A6 S Line TDI UltraShould you buy a used Audi A6 S Line TDI Ultra?
The Audi A6 S Line TDI Ultra has an overall MOT pass rate of 92.9% across 1,445 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
On the safety side, the most frequently flagged dangerous fault is tyre has ply or cords exposed. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a Audi A6 S Line TDI Ultra 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 S Line TDI Ultra owner drives around 9,954 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.
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.