Porsche Boxster vs Porsche Sup: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche Boxster
83%
MOT pass rate · 46,488 vehicles
Porsche Sup
100%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Porsche Boxster (83%) and Porsche Sup (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche Boxster | Porsche Sup |
|---|---|---|
| MOT pass rate | 83% | 100% ✓ |
| MOT failure rate | 17% | 0% ✓ |
| Faults & advisories per test | 1.4 | 0.0 ✓ |
| Dangerous-fault share | 1% | — ✓ |
| Average mileage | 74,547 mi | 62,769 mi |
| Sample size (vehicles) | 46,488 | 1 |
Most common faults
Porsche Boxster
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Under-trays fitted obscuring some underside components
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Porsche Sup
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Porsche Boxster (83%) and Porsche Sup (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche Boxster report Full Porsche Sup 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.