Fiat X1/9 MOT pass rate & common failures
The Fiat X1/9 appears in 1,430 MOT tests spanning model years 1980–2001, and 82.3% of them passed. Against all cars of a similar age (20.5% fail rate), the X1/9 comes out 2.8pp better. Its most common failure areas are lighting & signalling, brakes and emissions & environmental.
What the MOT record shows
Lighting & signalling dominates the failure mix at 12.2% of all tests — 3.7 points clear of brakes, so it is the first thing to check.
At component level the recurring items are non catalyst emissions, headlamp aim and service brake performance — non catalyst emissions alone was recorded 96 times.
Mileage is the strongest signal on the record: 15.7% of 0-30k cars fail, rising to 21.7% once past 90-120k.
Advisories point at the next bill rather than this one: suspension was flagged on 13.3% of tests without failing them.
How it compares
By model year
Every X1/9 model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 1982 | 49 | 79.6% | 20.4% | Lighting & signalling |
| 1983 | 76 | 76.3% | 23.7% | Lighting & signalling |
| 1984 | 112 | 83.9% | 16.1% | Lighting & signalling |
| 1985 | 84 | 84.5% | 15.5% | Brakes |
| 1986 | 116 | 85.3% | 14.7% | Lighting & signalling |
| 1987 | 305 | 82.3% | 17.7% | Lighting & signalling |
| 1988 | 305 | 82.3% | 17.7% | Lighting & signalling |
| 1989 | 294 | 81.3% | 18.7% | Lighting & signalling |
| 1990 | 48 | 87.5% | 12.5% | Lighting & signalling |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 12.2% | 175 |
| 2 | Brakes | 8.5% | 122 |
| 3 | Emissions & environmental | 6.9% | 98 |
| 4 | Visibility | 4.8% | 68 |
| 5 | Suspension | 3.1% | 44 |
| 6 | Body, structure & corrosion | 2.4% | 34 |
| 7 | Other defects | 1.1% | 15 |
| 8 | Steering | 1.0% | 14 |
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 | 96 |
| 2 | Headlamp aim | 80 |
| 3 | Service brake performance | 80 |
| 4 | Rbt (sp) | 74 |
| 5 | Headlamp | 67 |
| 6 | Washers | 45 |
| 7 | Component mounting prescribed areas | 42 |
| 8 | Rear fog lamp | 36 |
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 | 13.3% | 190 |
| 2 | Brakes | 13.1% | 187 |
| 3 | Emissions & environmental | 9.9% | 142 |
| 4 | Tyres | 7.7% | 110 |
| 5 | Body, structure & corrosion | 4.5% | 64 |
| 6 | Lighting & signalling | 4.1% | 58 |
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 | 172 | 15.7% |
| 30-60k | 629 | 14.5% |
| 60-90k | 481 | 20.8% |
| 90-120k | 120 | 21.7% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 335 | 18.8% |
| 2022 | 293 | 16.0% |
| 2023 | 294 | 17.3% |
| 2024 | 257 | 17.5% |
| 2025 | 251 | 18.7% |
What to check before buying a Fiat X1/9
- Lighting & signalling (12.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (8.5% 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 (6.9% 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
What is the MOT pass rate for the Fiat X1/9?
82.3% of the 1,430 Fiat X1/9 MOT tests in this dataset passed, a 17.7% fail rate, across model years 1980–2001.
What does the Fiat X1/9 most often fail its MOT on?
Lighting & signalling, recorded in 12.2% of tests, then brakes (8.5%).
How much does mileage affect X1/9 MOT results?
Fail rates run at 15.7% for cars in the 0-30k band and 21.7% for 90-120k, a 6.0-point difference.
Methodology & source. Based on 1,430 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.