1999 Porsche Boxster · 4,698 MOT tests
1999 Porsche Boxster reliability
1999 Porsche Boxsters fail 27.4% of first MOT tests, 26% fewer MOT fails than the average car its age and mileage, ranking 22 of 23 Boxster years (4,698 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Porsche Boxsters: 16.4%)
- 27.4%
- first-time fail rate (all Porsche Boxsters: 16.4%)
- fails than cars of the same age and mileage
- 26% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 24
- 92,064
- typical miles at its MOT, aged about 24
- MOT tests, 2022 to 2024
- 4,698
- MOT tests, 2022 to 2024
Year on year
1999 against the years either side
- 1998 cars: 18% fewer MOT fails than the average car its age (the 1999 car does better)
- 2000 cars: 32% fewer MOT fails than the average car its age (the 1999 car does worse)
- Weak spot: exhaust, emissions and leaks, 10.1% of tests fail here (38% above cars of the same age and mileage).
- Strong point: body, chassis and structure, 66% fewer fails than comparable cars.
Common problems
What fails on a 1999 Porsche Boxster
Fail rate by area
- Lights and electrics12%
- Exhaust, emissions and leaks10.1%
- Brakes7%
- Suspension5.4%
- Windscreen, wipers and mirrors4%
- Tyres3.5%
- Body, chassis and structure3%
Average for cars of the same age and mileage
Top failures
Lambda reading outside specified limits 4.94%
An out-of-range lambda reading suggests poor fuel mixture or a failing catalytic converter, so diagnosis is needed.
Headlamp beam pattern obviously incorrect 1.87%
A wrongly shaped beam can dazzle other drivers and reduce your own view of the road, so the lamps need correcting.
Position lamp not working 1.81%
A failed position lamp makes the car harder to see in poor light and is illegal, so it must be repaired.
Rigid brake pipe excessively corroded 1.6%
Badly corroded brake pipes can leak or fail, which can cause a loss of braking, so repair is urgent.
Horn not working 1.43%
A non-working horn removes a key warning tool for other road users, so it must be repaired before driving.
Wiper blade not clearing windscreen 1.34%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Common advisories
Brake pipes corroded and greasy (11.71%) · Engine oil leak, not excessive (8.19%) · Tyre worn close to legal limit (8.11%) · Brake disc pitted or scored (8%) · Tyre slightly damaged or cracking (5.47%) · Linkage ball joint slight play (4.26%)
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 1999 Porsche Boxster reliable?
1999 Porsche Boxsters fail 27.4% of first MOT tests, 26% fewer MOT fails than the average car its age and mileage, ranking 22 of 23 Boxster years (4,698 DVSA tests, 2022 to 2024).
What fails on a 1999 Porsche Boxster MOT?
Most often lambda reading outside specified limits (4.94% of tests), headlamp beam pattern obviously incorrect (1.87% of tests), position lamp not working (1.81% of tests).
How many miles should a 1999 Porsche Boxster have done?
At its MOT aged about 24, a typical 1999 Porsche Boxster shows 92,064 miles. Much higher or lower is worth asking about.
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