Porsche 911 vs Porsche Boxster
On MOT-testable defects, the Porsche 911 (fail rate 9.7%) performed better than the Porsche Boxster (13.8%) across comparable years. The biggest divergence was suspension, where the Boxster recorded failures more often.
9.7%
911 fail rate
13.8%
Boxster fail rate
4.16pp
Difference
Side by side
| Metric | Porsche 911 | Porsche Boxster |
|---|---|---|
| MOT tests analysed | 251,987 | 182,460 |
| Pass rate | 90.3% | 86.2% |
| Fail rate | 9.7% | 13.8% |
Where they differ
| Category | 911 | Boxster |
|---|---|---|
| Suspension | 1.6% | 3.8% |
| Emissions & environmental | 1.9% | 3.9% |
| Brakes | 2.0% | 3.6% |
| Lighting & signalling | 4.8% | 6.1% |
| Tyres | 2.3% | 2.7% |
Methodology & source. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.