MOT performance
1999 Porsche Boxster: MOT pass rate and common failures
Of 2,124 MOT tests on 1999-registered Porsche Boxsters in 2023–2024 (on average 24 years old at test, median 91,525 miles), 72.3% passed first time, 9.9 points lower than the Porsche Boxster overall. Allowing for age, mileage and fuel, 1999 Porsche Boxsters failed 22% less often than comparable cars.
2,124 MOT tests on 1,182 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 72.3% | ±1.9 pts (95%), n = 2,124 |
| All Porsche Boxsters | 82.2% | n = 65,604 |
| Failures vs similar cars | 0.78× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 5.8% | n = 2,124 |
| Average age at test | 24 years | n = 2,124 |
Where 1999 Porsche Boxsters fail
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Lights, reflectors and electrical | 11.7% | -24% |
| Noise, emissions and leaks | 10.2% | +22% |
| Brakes | 7.2% | -35% |
| Suspension | 5.8% | -51% |
| Driver's view of the road | 4.0% | -39% |
| Tyres | 3.9% | -8% |
| Body, chassis and structure | 3.1% | -61% |
| Steering | 1.1% | -60% |
| Seat belts and airbags | 0.8% | -72% |
| Registration plates and VIN | 0.6% | -24% |
| Road wheels | 0.2% | -17% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits | Noise, emissions and leaks | 7.02% |
| Rigid brake pipes: excessively corroded | Brakes | 2.78% |
| Position lamp: not working | Lights, reflectors and electrical | 2.73% |
| Headlamp aim: projected beam image is obviously incorrect | Lights, reflectors and electrical | 2.40% |
| Wipers: does not clear the windscreen effectively | Driver's view of the road | 2.02% |
Check a specific 1999 Porsche Boxster
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
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About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.