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Porsche Boxster 2020: MOT failure rate for its age

6.1% of 873 MOT tests of the Porsche Boxster first registered in 2020 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 109.2 (95% CI 79.8–138.6; 100 = normal for this model at that age): the 2020 build year is no different from other years of the same model at the same age. This is a rough estimate from a smaller sample.

Porsche Boxster built in 2020 at a glance
MeasureValueUnitCompared withYearsTests
Failed first time6.1%all ages tested2019–2024873
Index against this model at the same age (95% CI 79.8–138.6)109.2index100 = normal for this model at that age2019–2024873
Rank among this model's 23 build years23of 231 = fails least for its age2019–2024873
Tested in 2024435testsmedian 15,877 miles2024435
line · Porsche Boxster built 2020 · first-time MOT failure share by age · built 2020 7.3% vs model normal 5.5% at age 3 · 2019–2024
Built 2020 against Porsche Boxster normal for the age: first-time MOT failure share at each age, age 3: 7.3% vs 5.5%; age 4: 4.8% vs 5.6%. Axis from 0% to 10%. DVSA MOT bulk data, 2019–2024.
Check a 2020 Porsche Boxster by registration · All Porsche Boxster MOT statistics · Download the build-year table (CSV)

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).

How does the 2020 Porsche Boxster fail at each age?

Cars built in 2020 were tested at ages 3 to 4 between 2019 and 2024. Each row compares their first-time failure share with what this model normally shows at that age, after allowing for the overall failure level of each test year.

Porsche Boxster built 2020: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
AgeTestsFailed, %95% intervalNormal for this model at that age, %Index (100 = normal)
3438 (rough estimate)7.35.2–10.15.5132.2
4435 (rough estimate)4.83.2–7.35.686.4

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 873 (initial tests) · Method: normal rate = this model's first-time failure share at that age across its build years (cells of 400+ tests), adjusted for each test year's overall level; cells of 30+ tests, under 500 marked rough · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

What fails most on the 2020 Porsche Boxster?

The most common failure group on cars built in 2020 is tyres: 5.4 items per 100 first tests, against 5.1 across all build years of the Porsche Boxster. These counts are not age-adjusted: cars built in 2020 were tested at ages 3 to 4.

Failure items per 100 first tests, Porsche Boxster built 2020 against the Porsche Boxster in all build years (2019–2024, not age-adjusted)
Failure groupBuilt 2020, per 100All build years, per 100Items
Tyres5.45.149

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 905 (initial tests of this build year) · Method: failure items grouped by DVSA's top-level defect groups, per 100 initial tests; groups with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How does 2020 compare with the years around it?

Among the 23 published build years of the Porsche Boxster, 2020 ranks 23 (1 = fails least for its age). 2019: index 94.9.

Porsche Boxster build years: index against the model at the same age (2019–2024)
Build yearIndex (100 = normal)95% intervalVerdictTests
1998104.395.7–113.0no different (rough estimate)1,820
1999105.198.9–111.4no different (rough estimate)3,613
2000100.796.6–104.9no different8,204
2001104.1100.5–107.7worse11,433
2002108.6105.2–112.0worse13,858
2003108.4105.1–111.7worse15,506
2004107.6103.9–111.3worse12,889
200590.887.9–93.6better20,191
200696.092.0–100.0no different11,632
200793.388.7–97.8better9,837
200892.987.0–98.8better6,647
200977.270.7–83.7better5,127
201081.474.0–88.7better4,854
201194.886.2–103.5no different4,648
201298.790.8–106.5no different6,588
201397.189.5–104.7no different7,683
201494.986.7–103.1no different7,230
201591.282.4–100.1no different6,449
201698.789.8–107.6no different7,470
201791.481.0–101.7no different5,426
2018107.694.5–120.6no different4,208
201994.979.6–110.3no different (rough estimate)2,755
2020109.279.8–138.6no different (rough estimate)873

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 178,941 (initial tests) · Method: observed failures against those expected for the same model at the same ages, test-year level adjusted; verdict follows the printed one-decimal bound · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How to cite this page

MOT Risk Index (2026). Porsche Boxster 2020 MOT statistics (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 30 September 2026. motriskindex.co.uk/cars/porsche-boxster/2020/

How every figure is calculated: methodology. Age, test year and build year are tied together (age = test year − build year), so the test-year level is taken as observed, not estimated.

Other pages for this model

Porsche Boxster 1998 · Porsche Boxster 1999 · Porsche Boxster 2000 · Porsche Boxster 2001 · Porsche Boxster 2002 · Porsche Boxster 2003 · Porsche Boxster 2004 · Porsche Boxster 2005 · Porsche Boxster 2006 · Porsche Boxster 2007 · Porsche Boxster 2008 · Porsche Boxster 2009 · Porsche Boxster 2010 · Porsche Boxster 2011 · Porsche Boxster 2012 · Porsche Boxster 2013 · Porsche Boxster 2014 · Porsche Boxster 2015 · Porsche Boxster 2016 · Porsche Boxster 2017 · Porsche Boxster 2018 · Porsche Boxster 2019 · Porsche Boxster in the Netherlands · Porsche Boxster by postcode area · Porsche Boxster body, chassis and structure failures · Porsche Boxster brakes failures · Porsche Boxster vehicle identification failures · Porsche Boxster lamps, reflectors and electrics failures · Porsche Boxster noise, emissions and leaks failures · Porsche Boxster road wheels failures · Porsche Boxster seat belts and airbags failures · Porsche Boxster steering failures · Porsche Boxster suspension failures · Porsche Boxster tyres failures · Porsche Boxster visibility failures