MOT performance
Fiat 500X diesel: MOT pass rate and common failures
Of 21,508 MOT tests on diesel Fiat 500Xs in 2023–2024 (on average 7 years old at test, median 58,669 miles), 71.3% passed first time, against 80.3% of 48,377 petrol Fiat 500X tests. Allowing for age, mileage and fuel, diesel Fiat 500Xs failed 30% more often than comparable cars — 1.30× against 1.13× for the Fiat 500X as a whole.
21,508 MOT tests on 10,632 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 71.3% | ±0.6 pts (95%), n = 21,508 |
| All Fiat 500Xs | 77.5% | n = 69,885 |
| Failures vs similar cars | 1.30× | same age, mileage and fuel = 1.00; Fiat 500X overall 1.13× |
| Tests with a dangerous defect | 8.4% | n = 21,508 |
| Average age at test | 7 years | n = 21,508 |
| Registration years covered | 2015–2019 | DVSA first-use date |
Diesel against the other Fiat 500X fuels
Official DVSA test results by fuel, with 73 Auto's adjusted ratio (failures against cars of the same age, mileage and fuel). The diesel cars were tested 1.2 years older on average than the petrol ones, so the raw pass rates partly reflect age; the adjusted column doesn't.
| Fuel | Tests | Average age | First-time pass | vs similar cars | Dangerous |
|---|---|---|---|---|---|
| Petrol | 48,377 | 5.8 yrs | 80.3% | +4% | 5.3% |
| Diesel | 21,508 | 7 yrs | 71.3% | +30% | 8.4% |
Where diesel Fiat 500Xs differ
- Noise, emissions and leaks: diesel Fiat 500Xs failed 56% more often than the Fiat 500X overall, relative to comparable cars (2.91× vs 1.87×).
- Body, chassis and structure: diesel Fiat 500Xs failed 36% less often than the Fiat 500X overall, relative to comparable cars (0.54× vs 0.84×).
- Suspension: diesel Fiat 500Xs failed 31% more often than the Fiat 500X overall, relative to comparable cars (1.08× vs 0.83×).
- Driver's view of the road: diesel Fiat 500Xs failed 29% more often than the Fiat 500X overall, relative to comparable cars (0.99× vs 0.77×).
| Area | Diesel (vs similar) | All Fiat 500Xs (vs similar) |
|---|---|---|
| Lights, reflectors and electrical | 9.8% (+61%) | 7.9% (+46%) |
| Tyres | 8.6% (+36%) | 6.8% (+16%) |
| Suspension | 5.6% (+8%) | 3.5% (-17%) |
| Noise, emissions and leaks | 5.4% (+191%) | 2.8% (+87%) |
| Steering | 5.4% (+506%) | 4.3% (+410%) |
| Brakes | 3.8% (-19%) | 2.5% (-36%) |
| Driver's view of the road | 3.2% (-1%) | 2.7% (-23%) |
| Body, chassis and structure | 0.9% (-46%) | 1.0% (-16%) |
Most common diesel Fiat 500X failure items
| Item | Area | Share of tests |
|---|---|---|
| Position lamp: not working | Lights, reflectors and electrical | 6.44% |
| Malfunction indicator lamp: inoperative or indicates a malfunction | Noise, emissions and leaks | 3.72% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 3.37% |
| Track rod end: ball joint dust cover excessively damaged or deteriorated so that it no longer prevents the ingress of dirt | Steering | 3.10% |
| Condition: has ply or cords exposed | Tyres | 2.07% |
Pass rate by age, by fuel
| Age at test (years) | diesel pass rate (tests) | petrol pass rate (tests) |
|---|---|---|
| 3-4 | 86.7% (278) | 89.3% (10,336) |
| 5-6 | 76.7% (5,622) | 81.5% (13,997) |
| 7-8 | 69.4% (14,655) | 73.7% (19,614) |
| 9-10 | 64.7% (953) | 70.2% (1,356) |
Fiat 500X by registration year
Registration-year pages cover every fuel of that year.
- 2015 Fiat 500X · 71.4%
- 2016 Fiat 500X · 73.1%
- 2017 Fiat 500X · 78.8%
- 2018 Fiat 500X · 85.2%
- 2019 Fiat 500X · 89.0%
- 2020 Fiat 500X · 90.0%
What this does and doesn't tell you
Fuel is DVSA's recorded fuel type; plug-in and self-charging hybrids are grouped as hybrid. A difference between fuels can come from the engines themselves, or from how the cars are used — diesels typically cover more miles, and the adjusted ratio allows for mileage band but not for every difference in use. For one car, its own MOT history is the better guide: see MOT check.
Check a specific diesel Fiat 500X
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.
Related
- All Fiat 500X MOT results
- Fiat 500X petrol · 80.3% first-time pass
- Check one car’s MOT history
- What a used car costs to own