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Porsche Boxster vs Porsche Cayenne v6 platinum edition a: reliability comparison

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

Porsche Boxster
83%
MOT pass rate · 46,488 vehicles
Porsche Cayenne v6 platinum edition a
95%
MOT pass rate · 846 vehicles
More reliable
Verdict: On MOT pass rate, the Porsche Cayenne v6 platinum edition a is the more reliable of the two — 95% pass first time versus 83%. It's one signal among several; check the full breakdown below.

Head to head

Measure Porsche Boxster Porsche Cayenne v6 platinum edition a
MOT pass rate 83% 95% ✓
MOT failure rate 17% 5% ✓
Faults & advisories per test 1.4 0.5 ✓
Dangerous-fault share 1% ✓ 3%
Average mileage 74,547 mi 26,723 mi
Sample size (vehicles) 46,488 846

Most common faults

Porsche Boxster

  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. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Porsche Cayenne v6 platinum edition a

  1. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Rear 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 Rear Nail in tyre

Reliability FAQ

On MOT pass rate, the Porsche Cayenne v6 platinum edition a is the more reliable of the two — 95% pass first time versus 83%. It's one signal among several; check the full breakdown below.

Full Porsche Boxster report Full Porsche Cayenne v6 platinum edition a 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.