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Porsche Boxster vs Porsche Gt 4: 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 Gt 4
67%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Porsche Boxster (83%) and Porsche Gt 4 (67%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche Boxster Porsche Gt 4
MOT pass rate 83% ✓ 67%
MOT failure rate 17% ✓ 33%
Faults & advisories per test 1.4 ✓ 1.8
Dangerous-fault share 1% ✓ 6%
Average mileage 74,547 mi 16,449 mi
Sample size (vehicles) 46,488 1

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 Gt 4

  1. Front Tyre worn close to legal limit/worn on edge Both tyres are worn on inner tread (5.2.3 (e))
  2. Nearside Front Outer Tyre worn close to legal limit/worn on edge worn (no cords showing) (5.2.3 (e))
  3. Nearside Front Wheel bearing has slight play and o/s/f (5.1.3 (a) (i))
  4. Offside Rear Wheel bearing has slight play (5.1.3 (a) (i))
  5. Windscreen damaged but not adversely affecting driver's view small chip on the lower B zone (smaller then 40mm at the time of test) (3.2 (a) (i))
  6. Nearside Front Tyre fouling a part of the vehicle passenger side front tyre is fouling the inner wheel arch liner (5.2.3 (f))

Reliability FAQ

On MOT pass rate the Porsche Boxster (83%) and Porsche Gt 4 (67%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche Boxster report Full Porsche Gt 4 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.