Skip to content

Porsche Boxster vs Porsche Carrera rs: 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 Carrera rs
89%
MOT pass rate · 39 vehicles
More reliable
Verdict: On MOT pass rate, the Porsche Carrera rs is the more reliable of the two — 89% pass first time versus 83%. It's one signal among several; check the full breakdown below.

Head to head

Measure Porsche Boxster Porsche Carrera rs
MOT pass rate 83% 89% ✓
MOT failure rate 17% 11% ✓
Faults & advisories per test 1.4 0.6 ✓
Dangerous-fault share 1% 0% ✓
Average mileage 74,547 mi 76,469 mi
Sample size (vehicles) 46,488 39

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 Carrera rs

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (3.7.B.5b)
  5. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  6. chip in screen

Reliability FAQ

On MOT pass rate, the Porsche Carrera rs is the more reliable of the two — 89% pass first time versus 83%. It's one signal among several; check the full breakdown below.

Full Porsche Boxster report Full Porsche Carrera rs 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.