2021 Fiat 500 Mhev — MOT failures & pass rate
Across 9,429 MOT tests analysed for the 2021 Fiat 500 Mhev, the most common recorded failure areas were tyres, visibility and lighting & signalling. Its pass rate of 91.8% was in line with the average for cars of a similar age (91.2%). Higher-mileage examples failed more often — 15.9% in the 60-90k group versus 7.3% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.9% | 560 |
| 2 | Visibility | 2.7% | 254 |
| 3 | Lighting & signalling | 2.4% | 230 |
| 4 | Brakes | 0.7% | 66 |
| 5 | Suspension | 0.6% | 60 |
| 6 | Emissions & environmental | 0.3% | 31 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 189 |
| 2 | Headlamp aim | 156 |
| 3 | Tread depth | 154 |
| 4 | Washers | 136 |
| 5 | Shock absorbers | 55 |
| 6 | Headlamp | 47 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 21.4% | 2,017 |
| 2 | Brakes | 5.6% | 528 |
| 3 | Other defects | 3.3% | 309 |
| 4 | Suspension | 3.0% | 287 |
| 5 | Visibility | 2.1% | 194 |
| 6 | Lighting & signalling | 0.5% | 52 |
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 | 7,060 | 7.3% |
| 30-60k | 2,296 | 10.5% |
| 60-90k | 69 | 15.9% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 9,226 | 8.1% |
| Hybrid | 203 | 10.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 182 | 1.7% |
| 2024 | 4,597 | 8.0% |
| 2025 | 4,643 | 8.6% |
What to check before buying a 2021 500 Mhev
Before buying a 2021 Fiat 500 Mhev, focus on the areas it most often fails on. Tyres accounted for 5.9% of tests for this year.
- Tyres (5.9% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Visibility (2.7% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
- Lighting & signalling (2.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
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 2021 Fiat 500 Mhevs pass their MOT?
91.8% of the 9,429 2021 Fiat 500 Mhev MOT tests in this dataset passed — a 8.2% fail rate.
What is the most common MOT failure on a 2021 Fiat 500 Mhev?
Tyres, recorded in 5.9% of tests, followed by visibility (2.7%).
Does the 2021 500 Mhev get worse with mileage?
Its MOT fail rate rises from 7.3% in the 0-30k band to 15.9% in the 60-90k band.
Methodology & source. Based on 9,429 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.