2005 Porsche Boxster · 12,529 MOT tests
2005 Porsche Boxster reliability
2005 Porsche Boxsters fail 18.7% of first MOT tests, 53% fewer MOT fails than the average car its age and mileage, ranking 15 of 23 Boxster years (12,529 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Porsche Boxsters: 16.4%)
- 18.7%
- first-time fail rate (all Porsche Boxsters: 16.4%)
- fails than cars of the same age and mileage
- 53% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 18
- 74,024
- typical miles at its MOT, aged about 18
- MOT tests, 2022 to 2024
- 12,529
- MOT tests, 2022 to 2024
Year on year
2005 against the years either side
- 2004 cars: 39% fewer MOT fails than the average car its age (the 2005 car does better)
- 2006 cars: 55% fewer MOT fails than the average car its age (the 2005 car does worse)
- Strong point: body, chassis and structure, 82% fewer fails than comparable cars.
- Plates: a 2005 car carries a 54 plate (January–February 2005), or a 05 plate (March–August 2005), or a 55 plate (September–December 2005).
Common problems
What fails on a 2005 Porsche Boxster
Fail rate by area
- Lights and electrics5.7%
- Suspension5.6%
- Exhaust, emissions and leaks4.7%
- Brakes4.5%
- Tyres2.3%
- Windscreen, wipers and mirrors1.7%
- Body, chassis and structure1.3%
Average for cars of the same age and mileage
Top failures
Coil spring fractured or broken 2.59%
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
Lambda reading outside specified limits 2.47%
An out-of-range lambda reading suggests poor fuel mixture or a failing catalytic converter, so diagnosis is needed.
Rigid brake pipe excessively corroded 1.68%
Badly corroded brake pipes can leak or fail, which can cause a loss of braking, so repair is urgent.
Headlamp aim set too high 0.98%
Headlamps aimed too high can dazzle other drivers, and adjusting them is usually a quick job.
Wiper blade not clearing windscreen 0.97%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Tyre tread below 1.6mm 0.85%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Common advisories
Brake pipes corroded and greasy (12.14%) · Brake disc pitted or scored (9.31%) · Tyre worn close to legal limit (8.2%) · Tyre slightly damaged or cracking (5.55%) · Slight play in steering rack joints (3.36%) · Engine oil leak, not excessive (2.9%)
Other years
Every Porsche Boxster year
The full picture: Porsche Boxster reliability. Before you pay for any Porsche Boxster, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2005 Porsche Boxster reliable?
2005 Porsche Boxsters fail 18.7% of first MOT tests, 53% fewer MOT fails than the average car its age and mileage, ranking 15 of 23 Boxster years (12,529 DVSA tests, 2022 to 2024).
What fails on a 2005 Porsche Boxster MOT?
Most often coil spring fractured or broken (2.59% of tests), lambda reading outside specified limits (2.47% of tests), rigid brake pipe excessively corroded (1.68% of tests).
How many miles should a 2005 Porsche Boxster have done?
At its MOT aged about 18, a typical 2005 Porsche Boxster shows 74,024 miles. Much higher or lower is worth asking about.
What plate is a 2005 car?
A car first registered in 2005 carries a 54 plate (January–February 2005), or a 05 plate (March–August 2005), or a 55 plate (September–December 2005).
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