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Porsche Cayenne vs Porsche Speedstar: 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 Speedstar
71%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Porsche Cayenne (84%) and Porsche Speedstar (71%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche Cayenne Porsche Speedstar
MOT pass rate 84% ✓ 71%
MOT failure rate 16% ✓ 29%
Faults & advisories per test 1.2 ✓ 1.8
Dangerous-fault share 3% 0% ✓
Average mileage 87,610 mi 7,422 mi
Sample size (vehicles) 40,483 2

Most common faults

Porsche Cayenne

  1. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  2. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  6. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Porsche Speedstar

  1. Horn not working (1.6.2a)
  2. Front Steering system has slight free play detected at steering wheel (2.2.A.1a)
  3. Nearside Front Direction indicator not working (1.4.A.2c)
  4. Steering system has slight free play detected at steering wheel (2.2.A.1a)
  5. Nearside Front Front wheel bearing has excessive play (2.5.A.3c)
  6. Nearside Front Steering system has excessive free play detected at the steering wheel (steering box fitted) (2.2.A.1a)

Reliability FAQ

On MOT pass rate the Porsche Cayenne (84%) and Porsche Speedstar (71%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche Cayenne report Full Porsche Speedstar 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.