1999 SEAT Arosa — MOT failures & pass rate
The 1999 SEAT Arosa passed 75.4% of its 655 recorded MOT tests. All cars of a similar age fail 26.2% of the time, so this is 1.7pp better than the group it competes with. Failures cluster in lighting & signalling, brakes and emissions & environmental.
What the MOT record shows
Lighting & signalling dominates the failure mix at 13.1% of all tests — 4.9 points clear of brakes, so it is the first thing to check.
At component level the recurring items are catalyst emissions, headlamp aim and stop lamp — catalyst emissions alone was recorded 51 times.
A 120-150k example is materially riskier than a 0-30k one: 34.7% versus 14.7%.
Advisories point at the next bill rather than this one: suspension was flagged on 33.9% of tests without failing them.
The trend is worsening — 25.8% of tests failed in 2021 against 28.1% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 13.1% | 86 |
| 2 | Brakes | 8.2% | 54 |
| 3 | Emissions & environmental | 7.0% | 46 |
| 4 | Suspension | 6.9% | 45 |
| 5 | Body, structure & corrosion | 5.8% | 38 |
| 6 | Visibility | 5.2% | 34 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Catalyst emissions | 51 |
| 2 | Headlamp aim | 39 |
| 3 | Stop lamp | 26 |
| 4 | Service brake performance | 26 |
| 5 | Wipers | 24 |
| 6 | Exhaust system | 20 |
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 | 33.9% | 222 |
| 2 | Brakes | 31.4% | 206 |
| 3 | Tyres | 28.8% | 189 |
| 4 | Emissions & environmental | 24.0% | 157 |
| 5 | Body, structure & corrosion | 16.0% | 105 |
| 6 | Lighting & signalling | 13.1% | 86 |
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 | 34 | 14.7% |
| 30-60k | 190 | 20.0% |
| 60-90k | 234 | 25.6% |
| 90-120k | 139 | 27.3% |
| 120-150k | 49 | 34.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 198 | 25.8% |
| 2022 | 155 | 29.0% |
| 2023 | 113 | 15.0% |
| 2024 | 100 | 23.0% |
| 2025 | 89 | 28.1% |
What to check before buying a 1999 Arosa
On a 1999 Arosa, lighting & signalling is what the MOT record says goes wrong most — it appeared in 13.1% of tests. Check these areas before you commit.
- Lighting & signalling (13.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (8.2% 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.
- Emissions & environmental (7.0% 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 1999 SEAT Arosas pass their MOT?
75.4% of the 655 1999 SEAT Arosa MOT tests in this dataset passed — a 24.6% fail rate.
What is the most common MOT failure on a 1999 SEAT Arosa?
Lighting & signalling, recorded in 13.1% of tests, followed by brakes (8.2%).
Does the 1999 Arosa get worse with mileage?
Its MOT fail rate rises from 14.7% in the 0-30k band to 34.7% in the 120-150k band.
Methodology & source. Based on 655 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.