1990 Porsche 944 — MOT failures & pass rate
Across 1,814 MOT tests, the 1990 Porsche 944 recorded an 84.3% pass rate. That is 2.5 percentage points better than coupes & convertibles of a similar age, which fail at 18.2%. Failures cluster in lighting & signalling, brakes and visibility.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 11.2% of tests against 5.5% for the next-worst category.
At component level the recurring items are headlamp aim, washers and position lamp — headlamp aim alone was recorded 73 times.
Mileage is the strongest signal on the record: 10.3% of 0-30k cars fail, rising to 22.5% once past 150k — 2.2× the risk.
Brakes is the most common advisory, noted on 19.4% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 15.1% in 2021 to 13.6% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.2% | 203 |
| 2 | Brakes | 5.5% | 100 |
| 3 | Visibility | 5.0% | 90 |
| 4 | Suspension | 4.9% | 89 |
| 5 | Body, structure & corrosion | 3.8% | 69 |
| 6 | Emissions & environmental | 2.3% | 42 |
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 | 73 |
| 2 | Washers | 68 |
| 3 | Position lamp | 56 |
| 4 | Rear fog lamp | 50 |
| 5 | Component mounting prescribed areas | 44 |
| 6 | Individual direction indicators | 43 |
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 | 19.4% | 351 |
| 2 | Suspension | 17.1% | 311 |
| 3 | Tyres | 11.7% | 212 |
| 4 | Emissions & environmental | 10.9% | 198 |
| 5 | Body, structure & corrosion | 5.8% | 106 |
| 6 | Other defects | 5.4% | 98 |
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 | 39 | 10.3% |
| 30-60k | 162 | 6.2% |
| 60-90k | 277 | 13.0% |
| 90-120k | 452 | 14.4% |
| 120-150k | 479 | 16.3% |
| 150k+ | 404 | 22.5% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 370 | 15.1% |
| 2022 | 405 | 19.3% |
| 2023 | 344 | 15.4% |
| 2024 | 342 | 14.6% |
| 2025 | 353 | 13.6% |
What to check before buying a 1990 944
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 11.2% of tests. Start there.
- Lighting & signalling (11.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (5.5% 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.
- Visibility (5.0% 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.
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 1990 Porsche 944s pass their MOT?
84.3% of the 1,814 1990 Porsche 944 MOT tests in this dataset passed — a 15.7% fail rate.
What is the most common MOT failure on a 1990 Porsche 944?
Lighting & signalling, recorded in 11.2% of tests, followed by brakes (5.5%).
Does the 1990 944 get worse with mileage?
Its MOT fail rate rises from 10.3% in the 0-30k band to 22.5% in the 150k+ band.
Methodology & source. Based on 1,814 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.