1988 Porsche 944 — MOT failures & pass rate
Across 1,668 MOT tests, the 1988 Porsche 944 recorded a 76.6% pass rate. That is 6.5 percentage points worse than coupes & convertibles of a similar age, which fail at 16.9%. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
Lighting & signalling dominates the failure mix at 14.4% of all tests — 5.3 points clear of brakes, so it is the first thing to check.
At component level the recurring items are headlamp aim, service brake performance and component mounting prescribed areas — headlamp aim alone was recorded 130 times.
Condition tracks the odometer closely. Failures run at 13.5% in the 30-60k band and 27.8% in the 150k+ band, a 14.3-point spread — more than double.
Advisories point at the next bill rather than this one: brakes was flagged on 24.8% of tests without failing them.
The trend is improving — the fail rate fell from 25.8% in 2021 to 19.5% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 14.4% | 241 |
| 2 | Brakes | 9.2% | 153 |
| 3 | Suspension | 8.3% | 138 |
| 4 | Emissions & environmental | 6.2% | 103 |
| 5 | Visibility | 5.6% | 94 |
| 6 | Body, structure & corrosion | 4.4% | 74 |
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 | 130 |
| 2 | Service brake performance | 111 |
| 3 | Component mounting prescribed areas | 79 |
| 4 | Non catalyst emissions | 75 |
| 5 | Rear fog lamp | 71 |
| 6 | Washers | 66 |
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 | 24.8% | 414 |
| 2 | Suspension | 21.8% | 363 |
| 3 | Emissions & environmental | 18.6% | 311 |
| 4 | Other defects | 8.8% | 147 |
| 5 | Tyres | 8.5% | 141 |
| 6 | Body, structure & corrosion | 8.4% | 140 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 30-60k | 74 | 13.5% |
| 60-90k | 172 | 15.1% |
| 90-120k | 451 | 22.4% |
| 120-150k | 480 | 24.6% |
| 150k+ | 479 | 27.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 349 | 25.8% |
| 2022 | 357 | 24.6% |
| 2023 | 334 | 23.6% |
| 2024 | 325 | 22.8% |
| 2025 | 303 | 19.5% |
What to check before buying a 1988 944
On a 1988 944, lighting & signalling is what the MOT record says goes wrong most — it appeared in 14.4% of tests. Check these areas before you commit.
- Lighting & signalling (14.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (9.2% 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 (8.3% 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 1988 Porsche 944s pass their MOT?
76.6% of the 1,668 1988 Porsche 944 MOT tests in this dataset passed — a 23.4% fail rate.
What is the most common MOT failure on a 1988 Porsche 944?
Lighting & signalling, recorded in 14.4% of tests, followed by brakes (9.2%).
Does the 1988 944 get worse with mileage?
Its MOT fail rate rises from 13.5% in the 30-60k band to 27.8% in the 150k+ band.
Methodology & source. Based on 1,668 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.