2020 Audi A6 S Lne Blk Ed 40 Quat Sa — MOT failures & pass rate
Across 681 MOT tests analysed for the 2020 Audi A6 S Lne Blk Ed 40 Quat Sa, the most common recorded failure areas were tyres, visibility and brakes. Its pass rate of 92.1% was above the average for cars of a similar age (90.6%). Higher-mileage examples failed more often — 11.1% in the 60-90k group versus 3.1% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.6% | 38 |
| 2 | Visibility | 0.9% | 6 |
| 3 | Brakes | 0.7% | 5 |
| 4 | Suspension | 0.6% | 4 |
| 5 | Lighting & signalling | 0.4% | 3 |
| 6 | Seat belts & restraints | 0.4% | 3 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 34 |
| 2 | Brake pads | 7 |
| 3 | Mounting | 7 |
| 4 | Washers | 3 |
| 5 | Registration plates | 3 |
| 6 | Wipers | 3 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 19.5% | 133 |
| 2 | Brakes | 10.7% | 73 |
| 3 | Other defects | 5.9% | 40 |
| 4 | Visibility | 4.5% | 31 |
| 5 | Suspension | 4.5% | 31 |
| 6 | Emissions & environmental | 0.3% | 2 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 162 | 3.1% |
| 30-60k | 366 | 9.0% |
| 60-90k | 117 | 11.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 220 | 5.0% |
| 2024 | 233 | 9.4% |
| 2025 | 213 | 9.4% |
What to check before buying a 2020 A6 S Lne Blk Ed 40 Quat Sa
Before buying a 2020 Audi A6 S Lne Blk Ed 40 Quat Sa, focus on the areas it most often fails on. Tyres accounted for 5.6% of tests for this year.
- Tyres (5.6% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Visibility (0.9% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
- Brakes (0.7% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2020 Audi A6 S Lne Blk Ed 40 Quat Sas pass their MOT?
92.1% of the 681 2020 Audi A6 S Lne Blk Ed 40 Quat Sa MOT tests in this dataset passed — a 7.9% fail rate.
What is the most common MOT failure on a 2020 Audi A6 S Lne Blk Ed 40 Quat Sa?
Tyres, recorded in 5.6% of tests, followed by visibility (0.9%).
Does the 2020 A6 S Lne Blk Ed 40 Quat Sa get worse with mileage?
Its MOT fail rate rises from 3.1% in the 0-30k band to 11.1% in the 60-90k band.
Methodology & source. Based on 681 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.