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Porsche 911 vs Porsche Carrera45: 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 Carrera45
72%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Porsche 911 (85%) and Porsche Carrera45 (72%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche 911 Porsche Carrera45
MOT pass rate 85% ✓ 72%
MOT failure rate 15% ✓ 28%
Faults & advisories per test 1.1 0.8 ✓
Dangerous-fault share 1% 0% ✓
Average mileage 70,982 mi 674,149 mi
Sample size (vehicles) 74,656 1

Most common faults

Porsche 911

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Under-trays fitted obscuring some underside components
  4. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Oil leak, but not excessive (8.4.1 (a) (i))

Porsche Carrera45

  1. Nearside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)
  2. Nearside Rear Tyre tread depth below requirements of 1.6mm (4.1.E.1)
  3. Offside Rear Tyre tread depth below requirements of 1.6mm (4.1.E.1)
  4. brake discs are worn and all pads are below half way.
  5. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Offside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)

Reliability FAQ

On MOT pass rate the Porsche 911 (85%) and Porsche Carrera45 (72%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche 911 report Full Porsche Carrera45 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.