Porsche 911 carrera 4 tiptronic vs Porsche Cayenne: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche 911 carrera 4 tiptronic
81%
MOT pass rate · 77 vehicles
Porsche Cayenne
84%
MOT pass rate · 40,483 vehicles
More reliable
Verdict: On MOT pass rate, the Porsche Cayenne is the more reliable of the two — 84% pass first time versus 81%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Porsche 911 carrera 4 tiptronic | Porsche Cayenne |
|---|---|---|
| MOT pass rate | 81% | 84% ✓ |
| MOT failure rate | 19% | 16% ✓ |
| Faults & advisories per test | 1.4 | 1.2 ✓ |
| Dangerous-fault share | 1% ✓ | 3% |
| Average mileage | 84,094 mi | 87,610 mi |
| Sample size (vehicles) | 77 | 40,483 |
Most common faults
Porsche 911 carrera 4 tiptronic
- 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)
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Under-trays fitted obscuring some underside components
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Brake pipe corroded, covered in grease or other material (1.1.11 (c))
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 Cayenne is the more reliable of the two — 84% pass first time versus 81%. It's one signal among several; check the full breakdown below.
Full Porsche 911 carrera 4 tiptronic 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.