2021 Fiat 500 C Mhev — MOT failures & pass rate
Across 445 MOT tests analysed for the 2021 Fiat 500 C Mhev, the most common recorded failure areas were tyres, lighting & signalling and visibility. Its pass rate of 92.4% was above the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.5% | 29 |
| 2 | Lighting & signalling | 2.3% | 10 |
| 3 | Visibility | 1.6% | 7 |
| 4 | Suspension | 0.4% | 2 |
| 5 | Seat belts & restraints | 0.2% | 1 |
| 6 | Emissions & environmental | 0.2% | 1 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 8 |
| 2 | Tread depth | 7 |
| 3 | Tyre pressure monitoring system | 5 |
| 4 | Headlamp | 4 |
| 5 | Headlamp aim | 3 |
| 6 | Washers | 3 |
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 | 18.9% | 84 |
| 2 | Brakes | 6.3% | 28 |
| 3 | Other defects | 5.4% | 24 |
| 4 | Visibility | 3.1% | 14 |
| 5 | Suspension | 2.7% | 12 |
| 6 | Emissions & environmental | 0.4% | 2 |
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 | 374 | 6.7% |
| 30-60k | 68 | 13.2% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 213 | 6.6% |
| 2025 | 223 | 9.0% |
What to check before buying a 2021 500 C Mhev
Before buying a 2021 Fiat 500 C Mhev, focus on the areas it most often fails on. Tyres accounted for 6.5% of tests for this year.
- Tyres (6.5% 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.
- Lighting & signalling (2.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (1.6% 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.
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 C Mhevs pass their MOT?
92.4% of the 445 2021 Fiat 500 C Mhev MOT tests in this dataset passed — a 7.6% fail rate.
What is the most common MOT failure on a 2021 Fiat 500 C Mhev?
Tyres, recorded in 6.5% of tests, followed by lighting & signalling (2.3%).
Does the 2021 500 C Mhev get worse with mileage?
Its MOT fail rate rises from 6.7% in the 0-30k band to 13.2% in the 30-60k band.
Methodology & source. Based on 445 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.