Porsche 356b kit car vs Porsche Cayenne: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche 356b kit car
56%
MOT pass rate · 1 vehicles
Porsche Cayenne
84%
MOT pass rate · 40,483 vehicles
Verdict: On MOT pass rate the Porsche 356b kit car (56%) and Porsche Cayenne (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche 356b kit car | Porsche Cayenne |
|---|---|---|
| MOT pass rate | 56% | 84% ✓ |
| MOT failure rate | 44% | 16% ✓ |
| Faults & advisories per test | 1.8 | 1.2 ✓ |
| Dangerous-fault share | 0% ✓ | 3% |
| Average mileage | 7,511 mi | 87,610 mi |
| Sample size (vehicles) | 1 | 40,483 |
Most common faults
Porsche 356b kit car
- Under-trays fitted obscuring some underside components
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Headlamp not working on dipped beam (1.7.5a)
- Nearside Headlamp not working on main beam (1.7.5a)
- Offside Headlamp not working on dipped beam (1.7.5a)
- Offside Headlamp not working on main beam (1.7.5a)
Porsche Cayenne
- Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Reliability FAQ
On MOT pass rate the Porsche 356b kit car (56%) and Porsche Cayenne (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche 356b kit car report Full Porsche Cayenne report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.