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Porsche C4 vs Porsche Cayenne: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Porsche C4
87%
MOT pass rate · 1 vehicles
Porsche Cayenne
84%
MOT pass rate · 40,483 vehicles
Verdict: On MOT pass rate the Porsche C4 (87%) and Porsche Cayenne (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche C4 Porsche Cayenne
MOT pass rate 87% ✓ 84%
MOT failure rate 13% ✓ 16%
Faults & advisories per test 1.0 ✓ 1.2
Dangerous-fault share 0% ✓ 3%
Average mileage 80,763 mi 87,610 mi
Sample size (vehicles) 1 40,483

Most common faults

Porsche C4

  1. Nearside Rear Direction indicator slightly discoloured (1.4.A.2f)
  2. Offside Rear Direction indicator slightly discoloured (1.4.A.2f)
  3. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Nearside Side repeater slightly discoloured (1.4.A.2f)
  5. Parking brake: efficiency below requirements (3.7.B.7)
  6. Nearside Front Tyre worn close to the legal limit (4.1.E.1)

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))

Reliability FAQ

On MOT pass rate the Porsche C4 (87%) and Porsche Cayenne (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche C4 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.