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Porsche Boxster vs Porsche S: 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 S
78%
MOT pass rate · 9 vehicles
Verdict: On MOT pass rate the Porsche Boxster (83%) and Porsche S (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche Boxster Porsche S
MOT pass rate 83% ✓ 78%
MOT failure rate 17% ✓ 22%
Faults & advisories per test 1.4 0.8 ✓
Dangerous-fault share 1% 0% ✓
Average mileage 74,547 mi 46,139 mi
Sample size (vehicles) 46,488 9

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 S

  1. Windscreen washer provides insufficient washer liquid (8.2.3)
  2. Nearside Rear Anti-roll bar linkage has slight play in a pin/bush (2.4.G.2)
  3. Offside Rear Anti-roll bar linkage has slight play in a pin/bush (2.4.G.2)
  4. Offside Headlamp not in good working order adversely affecting beam image (1.2.4a)
  5. Steering system has slight free play detected at steering wheel (2.2.A.1b)
  6. Steering system has slight free play detected at steering wheel (2.2.A.1a)

Reliability FAQ

On MOT pass rate the Porsche Boxster (83%) and Porsche S (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche Boxster report Full Porsche S 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.