1988 Fiat X1/9 — MOT failures & pass rate
Across 305 MOT tests analysed for the 1988 Fiat X1/9, the most common recorded failure areas were lighting & signalling, brakes and emissions & environmental. Its pass rate of 82.3% was above the average for cars of a similar age (80.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.8% | 36 |
| 2 | Brakes | 9.5% | 29 |
| 3 | Emissions & environmental | 7.2% | 22 |
| 4 | Visibility | 2.9% | 9 |
| 5 | Suspension | 2.6% | 8 |
| 6 | Body, structure & corrosion | 1.6% | 5 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Non catalyst emissions | 25 |
| 2 | Headlamp aim | 19 |
| 3 | Service brake performance | 17 |
| 4 | Rbt (sp) | 15 |
| 5 | Service brake imbalance | 12 |
| 6 | Headlamp | 11 |
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 | 19.3% | 59 |
| 2 | Brakes | 13.8% | 42 |
| 3 | Emissions & environmental | 10.5% | 32 |
| 4 | Tyres | 10.5% | 32 |
| 5 | Steering | 4.6% | 14 |
| 6 | Body, structure & corrosion | 4.6% | 14 |
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 | 49 | 16.3% |
| 30-60k | 120 | 16.7% |
| 60-90k | 106 | 21.7% |
| 90-120k | 30 | 10.0% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 68 | 22.1% |
| 2022 | 53 | 11.3% |
| 2023 | 63 | 15.9% |
| 2024 | 56 | 19.6% |
| 2025 | 65 | 18.5% |
What to check before buying a 1988 X1/9
Before buying a 1988 Fiat X1/9, focus on the areas it most often fails on. Lighting & signalling accounted for 11.8% of tests for this year.
- Lighting & signalling (11.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (9.5% 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.
- Emissions & environmental (7.2% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 Fiat X1/9s pass their MOT?
82.3% of the 305 1988 Fiat X1/9 MOT tests in this dataset passed — a 17.7% fail rate.
What is the most common MOT failure on a 1988 Fiat X1/9?
Lighting & signalling, recorded in 11.8% of tests, followed by brakes (9.5%).
Does the 1988 X1/9 get worse with mileage?
Its MOT fail rate rises from 16.3% in the 0-30k band to 10.0% in the 90-120k band.
Methodology & source. Based on 305 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.