Porsche Cayenne vs Porsche Gt3 rs 4.0: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche Cayenne
84%
MOT pass rate · 40,483 vehicles
Porsche Gt3 rs 4.0
83%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Porsche Cayenne (84%) and Porsche Gt3 rs 4.0 (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche Cayenne | Porsche Gt3 rs 4.0 |
|---|---|---|
| MOT pass rate | 84% ✓ | 83% |
| MOT failure rate | 16% ✓ | 17% |
| Faults & advisories per test | 1.2 | 0.9 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 87,610 mi | 5,861 mi |
| Sample size (vehicles) | 40,483 | 2 |
Most common faults
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))
Porsche Gt3 rs 4.0
- Both front tyres are wearing on outer edges 245/35/19 89Y
- Engine covers and under-trays fitted obscuring some components.
- Offside Rear fog lamp not working (1.3.2b)
- Under covers obscuring some testable items
- Both rear tyres are wearing low & wearing on outer edges 325/30/19 101Y
- Both rear tyres wearing on Inner/outer edges 325/30/19 101Y
Reliability FAQ
On MOT pass rate the Porsche Cayenne (84%) and Porsche Gt3 rs 4.0 (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche Cayenne report Full Porsche Gt3 rs 4.0 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.