1989 Porsche 944 — MOT failures & pass rate
The 1989 Porsche 944 passed 81.6% of its 2,570 recorded MOT tests. That is effectively the same as coupes & convertibles of a similar age (17.5% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 10.9% of tests against 6.8% for the next-worst category.
At component level the recurring items are headlamp aim, service brake performance and component mounting prescribed areas — headlamp aim alone was recorded 119 times.
Mileage is the strongest signal on the record: 11.1% of 0-30k cars fail, rising to 22.4% once past 150k — 2.0× the risk.
Brakes is the most common advisory, noted on 20.5% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 20.4% in 2021 to 15.4% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 10.9% | 279 |
| 2 | Brakes | 6.8% | 174 |
| 3 | Suspension | 6.4% | 164 |
| 4 | Visibility | 4.3% | 110 |
| 5 | Emissions & environmental | 4.2% | 109 |
| 6 | Body, structure & corrosion | 3.5% | 90 |
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 | 119 |
| 2 | Service brake performance | 114 |
| 3 | Component mounting prescribed areas | 89 |
| 4 | Washers | 88 |
| 5 | Rear fog lamp | 77 |
| 6 | Non catalyst emissions | 76 |
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 | 20.5% | 528 |
| 2 | Suspension | 18.8% | 483 |
| 3 | Emissions & environmental | 14.9% | 382 |
| 4 | Tyres | 9.8% | 253 |
| 5 | Body, structure & corrosion | 7.8% | 201 |
| 6 | Other defects | 7.3% | 187 |
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 | 36 | 11.1% |
| 30-60k | 136 | 8.8% |
| 60-90k | 374 | 14.4% |
| 90-120k | 707 | 17.5% |
| 120-150k | 652 | 19.8% |
| 150k+ | 661 | 22.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 572 | 20.4% |
| 2022 | 521 | 18.6% |
| 2023 | 515 | 15.9% |
| 2024 | 501 | 21.0% |
| 2025 | 461 | 15.4% |
What to check before buying a 1989 944
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 10.9% of tests. Start there.
- Lighting & signalling (10.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (6.8% 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 (6.4% 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 1989 Porsche 944s pass their MOT?
81.6% of the 2,570 1989 Porsche 944 MOT tests in this dataset passed — a 18.4% fail rate.
What is the most common MOT failure on a 1989 Porsche 944?
Lighting & signalling, recorded in 10.9% of tests, followed by brakes (6.8%).
Does the 1989 944 get worse with mileage?
Its MOT fail rate rises from 11.1% in the 0-30k band to 22.4% in the 150k+ band.
Methodology & source. Based on 2,570 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.