1997 Audi A6 — MOT failures & pass rate
The 1997 Audi A6 passed 75.5% of its 555 recorded MOT tests. Against executive cars of a similar age (22.3% fail rate), the 1997 A6 comes out 2.2pp worse. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
No single area dominates — lighting & signalling (12.8%) and brakes (10.1%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, catalyst emissions and pins and bushes — headlamp aim alone was recorded 36 times.
Mileage matters less than usual here: the 1997 A6 fails 21.2% of the time in the 60-90k band and 24.6% at 150k+, a spread of only 3.4 points.
Suspension is the most common advisory, noted on 40.0% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 28.2% in 2021 to 21.0% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 12.8% | 71 |
| 2 | Brakes | 10.1% | 56 |
| 3 | Suspension | 7.8% | 43 |
| 4 | Body, structure & corrosion | 6.9% | 38 |
| 5 | Emissions & environmental | 5.4% | 30 |
| 6 | Visibility | 5.2% | 29 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 36 |
| 2 | Catalyst emissions | 32 |
| 3 | Pins and bushes | 24 |
| 4 | Headlamp | 19 |
| 5 | Joints | 19 |
| 6 | Position lamp | 19 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 40.0% | 222 |
| 2 | Brakes | 34.6% | 192 |
| 3 | Tyres | 24.7% | 137 |
| 4 | Emissions & environmental | 18.2% | 101 |
| 5 | Other defects | 16.9% | 94 |
| 6 | Body, structure & corrosion | 14.4% | 80 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 60-90k | 33 | 21.2% |
| 90-120k | 89 | 22.5% |
| 120-150k | 108 | 27.8% |
| 150k+ | 297 | 24.6% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 341 | 27.0% |
| Diesel | 214 | 20.6% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 163 | 28.2% |
| 2022 | 120 | 20.8% |
| 2023 | 119 | 23.5% |
| 2024 | 91 | 26.4% |
| 2025 | 62 | 21.0% |
What to check before buying a 1997 A6
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 12.8% of tests. Start there.
- Lighting & signalling (12.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (10.1% 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.
- Suspension (7.8% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
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 1997 Audi A6s pass their MOT?
75.5% of the 555 1997 Audi A6 MOT tests in this dataset passed — a 24.5% fail rate.
What is the most common MOT failure on a 1997 Audi A6?
Lighting & signalling, recorded in 12.8% of tests, followed by brakes (10.1%).
Does the 1997 A6 get worse with mileage?
Its MOT fail rate rises from 21.2% in the 60-90k band to 24.6% in the 150k+ band.
Methodology & source. Based on 555 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.