Porsche 911 vs Porsche 924 turb: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche 911
85%
MOT pass rate · 74,656 vehicles
Porsche 924 turb
75%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Porsche 911 (85%) and Porsche 924 turb (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche 911 | Porsche 924 turb |
|---|---|---|
| MOT pass rate | 85% ✓ | 75% |
| MOT failure rate | 15% ✓ | 25% |
| Faults & advisories per test | 1.1 ✓ | 2.0 |
| Dangerous-fault share | 1% | 0% ✓ |
| Average mileage | 70,982 mi | 84,428 mi |
| Sample size (vehicles) | 74,656 | 1 |
Most common faults
Porsche 911
- 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)
- Oil leak, but not excessive (8.4.1 (a) (i))
Porsche 924 turb
- Nearside Front Headlamp not in good working order adversely affecting beam image (1.2.4a)
- Nearside Front Seat belt retracting mechanism defective (5.2.5b)
- Nearside Front Steering system has excessive free play detected at the steering wheel (steering rack fitted) (2.2.A.1b)
- Nearside Rear Brake hose excessively deteriorated (3.6.B.4d)
- Offside Front Headlamp not in good working order adversely affecting beam image (1.2.4a)
- Offside Front Seat belt damaged sufficient to obstruct correct operation of the belt (5.2.2a)
Reliability FAQ
On MOT pass rate the Porsche 911 (85%) and Porsche 924 turb (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche 911 report Full Porsche 924 turb 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.