82.6%
Porsche Boxster
Porsche Boxster MOT pass rate and common problems
The Porsche Boxster passed 82.6% of its initial MOT tests in 2025, 10.3 percentage points above the 72.3% UK average. The item testers recorded most often was catalyst emissions lambda reading after 2nd fast idle outside specified limits.
Checking a specific car? Its own results, advisories and recorded mileages are in a free MOT history check.
How the Boxster compares
Initial MOT tests in 2025, retests excluded. A car that failed and was repaired at the test station counts as a fail.
87.6%
Porsche average
72.3%
UK average, all cars
The Boxster runs 4.9 points behind the Porsche average. It is 7th of the 8 Porsche models in the data. The average Boxster arrived at its test 17.4 years old with 65,921 miles recorded.
A pass rate records whether cars met the roadworthiness standard on test day. It is not a reliability score, and part of any gap reflects how old the tested cars were.
Boxster MOT pass rate by age
The same 2025 tests split by the car's age at test.
Porsche Boxster cars aged 3 to 5 years passed 94.2% of MOT tests. For cars aged 11 years and over that fell to 79.8%, a drop of 14.4 percentage points.
| Age at test | Tests | Pass rate | vs UK average |
|---|---|---|---|
| 3 to 5 years | 1,353 | 94.2% | 21.9 pts above |
| 6 to 10 years | 5,282 | 93% | 20.7 pts above |
| 11 years and over | 25,479 | 79.8% | 7.5 pts above |
That is a steep decline with age, so the headline rate flatters older examples. The UK average of 72.3% covers cars of every age, so compare like with like.
Where Boxster failures cluster
Every failure item recorded on Porsche Boxster cars in 2025, grouped into the DVSA's test areas.
Lamps, reflectors and electrical equipment and brakes together account for 43.4% of recorded failure items. These are recorded failures across the model, not faults every car has.
The 10 most common Boxster MOT failures
Specific items recorded on Porsche Boxster cars that failed their 2025 MOT, as a share of all recorded failure items.
Together these 10 items make up 39.4% of everything testers recorded against failed Porsche Boxster cars. The rest is spread across many smaller items, and one failed test often records several at once.
What to look at on a Boxster
The recorded failures above, grouped by area, biggest first.
1
Lamps, reflectors and electrical equipment
Recorded most often: position lamp not working, headlamp aim projected beam image is obviously incorrect, headlamp aim too high and headlamp not working on dipped beam. 12% of failure items.
2
Noise, emissions and leaks
Recorded most often: catalyst emissions lambda reading after 2nd fast idle outside specified limits. 7.7% of failure items.
3
Brakes
Recorded most often: rigid brake pipes excessively corroded. 5.9% of failure items.
4
Suspension
Recorded most often: coil spring fractured or broken. 4.4% of failure items.
The car's own MOT history matters more than any model average. A free MOT history check shows whether a specific Boxster has failed on these items before, or had them noted as advisories. Buying one? See the used Porsche Boxster buying guide.
Already found one?
Check its finance, write-off, theft, mileage and keeper history with a £15 vehicle history report.
Porsche Boxster MOT FAQs
What is the Porsche Boxster MOT pass rate?
82.6% of Porsche Boxster cars passed their initial MOT first time in 2025, from 32,332 tests. That is 10.3 percentage points above the 72.3% average for all cars, and ranks 161st of 575 models.
What does a Porsche Boxster most commonly fail its MOT on?
The item testers recorded most often on Porsche Boxster cars failing their 2025 MOT was catalyst emissions lambda reading after 2nd fast idle outside specified limits, on 7.7% of failure items. Next were rigid brake pipes excessively corroded (5.9%) and coil spring fractured or broken (4.4%).
Which area causes the most Porsche Boxster MOT failures?
Across every recorded failure item, the largest area was lamps, reflectors and electrical equipment at 26.3%, followed by brakes at 17.1%.
Do older Porsche Boxster cars fail their MOT more often?
Porsche Boxster cars aged 3 to 5 years passed 94.2% of MOT tests in 2025, against 79.8% for cars aged 11 years and over.
Does this mean every Porsche Boxster has these problems?
No. These are the items testers recorded across every Porsche Boxster that failed in 2025. They show where the model most often needs attention, not the condition of any individual car.
How do I see a specific Porsche Boxster's MOT history?
Enter its registration on the free Carpeep MOT history check to see that car's own test results, failures, advisories and recorded mileages.
MOT figures are aggregated from the DVSA MOT Anonymised data set for 2025: class 4 initial tests, retests excluded, with failure items from failed tests (advisories and minor defects excluded), licensed under the Open Government Licence v3.0. MOT results describe roadworthiness at test, not mechanical reliability.