1985 Audi Quattro — MOT failures & pass rate
332 MOT tests on the 1985 Audi Quattro are in this dataset, and 85.5% of them passed. All cars of a similar age fail 20.0% of the time, so this is 5.5pp better than the group it competes with. Failures cluster in lighting & signalling, visibility and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (8.4%) and visibility (7.2%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are washers, non catalyst emissions and headlamp aim — washers alone was recorded 25 times.
Condition tracks the odometer closely. Failures run at 15.6% in the 0-30k band and 11.4% in the 150k+ band, a 4.2-point spread.
Brakes is the most common advisory, noted on 10.2% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 17.6% in 2021 to 10.5% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 8.4% | 28 |
| 2 | Visibility | 7.2% | 24 |
| 3 | Brakes | 5.4% | 18 |
| 4 | Emissions & environmental | 5.4% | 18 |
| 5 | Suspension | 4.2% | 14 |
| 6 | Body, structure & corrosion | 2.7% | 9 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Washers | 25 |
| 2 | Non catalyst emissions | 19 |
| 3 | Headlamp aim | 17 |
| 4 | Wipers | 9 |
| 5 | Rear fog lamp | 8 |
| 6 | Stop lamp | 7 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 10.2% | 34 |
| 2 | Suspension | 9.3% | 31 |
| 3 | Tyres | 7.2% | 24 |
| 4 | Lighting & signalling | 5.4% | 18 |
| 5 | Body, structure & corrosion | 5.4% | 18 |
| 6 | Emissions & environmental | 3.9% | 13 |
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 | 32 | 15.6% |
| 60-90k | 51 | 17.6% |
| 90-120k | 74 | 14.9% |
| 120-150k | 70 | 14.3% |
| 150k+ | 70 | 11.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 74 | 17.6% |
| 2022 | 65 | 15.4% |
| 2023 | 68 | 11.8% |
| 2024 | 68 | 16.2% |
| 2025 | 57 | 10.5% |
What to check before buying a 1985 Quattro
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 8.4% of tests. Start there.
- Lighting & signalling (8.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (7.2% 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 (5.4% 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 1985 Audi Quattros pass their MOT?
85.5% of the 332 1985 Audi Quattro MOT tests in this dataset passed — a 14.5% fail rate.
What is the most common MOT failure on a 1985 Audi Quattro?
Lighting & signalling, recorded in 8.4% of tests, followed by visibility (7.2%).
Does the 1985 Quattro get worse with mileage?
Its MOT fail rate rises from 15.6% in the 0-30k band to 11.4% in the 150k+ band.
Methodology & source. Based on 332 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.