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Porsche 911 t vs Porsche Boxster: reliability comparison

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

Porsche 911 t
77%
MOT pass rate · 23 vehicles
Porsche Boxster
83%
MOT pass rate · 46,488 vehicles
Verdict: On MOT pass rate the Porsche 911 t (77%) and Porsche Boxster (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche 911 t Porsche Boxster
MOT pass rate 77% 83% ✓
MOT failure rate 23% 17% ✓
Faults & advisories per test 1.3 ✓ 1.4
Dangerous-fault share 0% ✓ 1%
Average mileage 42,038 mi 74,547 mi
Sample size (vehicles) 23 46,488

Most common faults

Porsche 911 t

  1. Horn not working (1.6.2a)
  2. Nearside Headlamp aim beam image kick up to the offside (1.8)
  3. Nearside Front position lamp(s) not working (1.1.A.3b)
  4. Offside Front Shock absorber has a light misting of oil (2.7.3)
  5. Windscreen washer provides insufficient washer liquid (8.2.3)
  6. Oil leak

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))

Reliability FAQ

On MOT pass rate the Porsche 911 t (77%) and Porsche Boxster (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche 911 t report Full Porsche Boxster 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.