MOT performance
Mazda CX-3 vs Kia Soul: MOT pass rates compared
In 2023–2024, 86.2% of 50,909 Mazda CX-3 MOT tests and 71.1% of 48,662 Kia Soul tests passed first time — 15.1 points in favour of the Mazda CX-3. Once age, mileage and fuel are allowed for, the Mazda CX-3 fails less often than the Kia Soul: 0.80× against 1.04× the national rate for comparable cars.
50,909 Mazda CX-3 and 48,662 Kia Soul MOT tests, 2023–2024
Check a specific car's MOT history and running costsAt a glance
| Figure | Value | Basis |
|---|---|---|
| Mazda CX-3: first-time pass rate | 86.2% | ±0.3 pts (95%), n = 50,909 |
| Kia Soul: first-time pass rate | 71.1% | ±0.4 pts (95%), n = 48,662 |
| Mazda CX-3: failures vs similar cars | -20% | same age, mileage and fuel = 1.00 |
| Kia Soul: failures vs similar cars | +4% | same age, mileage and fuel = 1.00 |
| Mazda CX-3: dangerous defect | 4.4% | n = 50,909 |
| Kia Soul: dangerous defect | 8.4% | n = 48,662 |
| Average age at test | 5.4 vs 9.2 years | Mazda CX-3 vs Kia Soul |
Why the raw pass rates can mislead
The Kia Soul was tested at an older average age (9.2 years against 5.4), and older cars fail more often whatever they are. That is why the table above also shows failures against cars of the same age, mileage and fuel: it compares the models, not their fleets.
Failure areas side by side
Share of MOT tests that failed on each area, and in brackets how that compares with cars of the same age, mileage and fuel (1.00 = national average). The clearest difference is steering, where the Kia Soul fails 55.2 times as often on an adjusted basis.
| Area | Mazda CX-3 | Kia Soul |
|---|---|---|
| Brakes | 3.0% (-7%) | 8.9% (+45%) |
| Steering | 0.1% (-92%) | 7.9% (+336%) |
| Suspension | 2.0% (-30%) | 6.7% (-24%) |
| Tyres | 4.2% (-22%) | 6.2% (-5%) |
| Road wheels | 0.1% (-51%) | 0.3% (-25%) |
| Lights, reflectors and electrical | 2.1% (-51%) | 9.2% (-10%) |
| Body, chassis and structure | 0.2% (-80%) | 1.4% (-52%) |
| Driver's view of the road | 3.1% (-10%) | 5.0% (+17%) |
| Noise, emissions and leaks | 0.3% (-69%) | 1.3% (-49%) |
| Seat belts and airbags | 1.4% (+311%) | 0.3% (-58%) |
| Registration plates and VIN | 0.1% (-36%) | 0.2% (-34%) |
Pass rate at the same age
Comparing cars of the same age removes most of the fleet-age effect from the raw rates.
| Age at test | Mazda CX-3 | Kia Soul |
|---|---|---|
| 3-4 years | 90.2% (n = 17,008) | 87.8% (n = 3,191) |
| 5-6 years | 86.8% (n = 20,421) | 85.4% (n = 6,722) |
| 7-8 years | 80.3% (n = 12,818) | 81.8% (n = 9,360) |
| 9-10 years | 75.5% (n = 653) | 70.0% (n = 7,698) |
Most common failure item
- Mazda CX-3 · wipers: does not clear the windscreen effectively (2.16% of tests)
- Kia Soul · track rod end: ball joint has excessive play (6.64% of tests)
MOT results reflect how cars are maintained as well as how they are built, so a gap between two models is a difference in test performance, not proof that one is more reliable. For one car, its own MOT history says more than any average.
Check a specific car
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.