Porsche Cayman 2011: MOT failure rate for its age

9.7% of 3,333 MOT tests of the Porsche Cayman first registered in 2011 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 83.5 (95% CI 74.4–92.6; 100 = normal for this model at that age): the 2011 Porsche Cayman fails less often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.

Porsche Cayman built in 2011 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	9.7	%	all ages tested	2019–2024	3333
Index against this model at the same age (95% CI 74.4–92.6)	83.5	index	100 = normal for this model at that age	2019–2024	3333
Rank among this model's 16 build years	2	of 16	1 = fails least for its age	2019–2024	3333
Tested in 2024	554	tests	median 50,768 miles	2024	554

Built 2011 against Porsche Cayman normal for the age: first-time MOT failure share at each age, age 8: 8.4% vs 7.3%; age 9: 10.5% vs 8.2%; age 10: 9.8% vs 10.1%; age 11: 8.6% vs 11.3%; age 12: 10.1% vs 15.7%; age 13: 10.8% vs 17.1%. Axis from 0% to 20%. DVSA MOT bulk data, 2019–2024.

Check a 2011 Porsche Cayman by registration · All Porsche Cayman 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 2011 Porsche Cayman fail at each age?

Cars built in 2011 were tested at ages 8 to 13 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 Cayman built 2011: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
Age	Tests	Failed, %	95% interval	Normal for this model at that age, %	Index (100 = normal)
8	584	8.4	6.4–10.9	7.3	114.3
9	545	10.5	8.2–13.3	8.2	128
10	564	9.8	7.6–12.5	10.1	96.9
11	549	8.6	6.5–11.2	11.3	75.6
12	537	10.1	7.8–12.9	15.7	64.1
13	554	10.8	8.5–13.7	17.1	63.2

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,333 (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 2011 Porsche Cayman?

The most common failure group on cars built in 2011 is brakes: 4.7 items per 100 first tests, against 4.2 across all build years of the Porsche Cayman. These counts are not age-adjusted: cars built in 2011 were tested at ages 8 to 13.

Failure items per 100 first tests, Porsche Cayman built 2011 against the Porsche Cayman in all build years (2019–2024, not age-adjusted)
Failure group	Built 2011, per 100	All build years, per 100	Items
Brakes	4.7	4.2	156
Tyres	4.2	4.2	140
Lamps, reflectors and electrical equipment	3.4	5.2	113
Visibility	2.7	3.4	89
Suspension	2.3	2.6	77

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 3,333 (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 2011 compare with the years around it?

Among the 16 published build years of the Porsche Cayman, 2011 ranks 2 (1 = fails least for its age). 2010: index 89.2. 2012: index 87.0.

Porsche Cayman build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2005	108.7	93.4–124.0	no different (rough estimate)	871
2006	110.0	105.2–114.8	worse	9,285
2007	107.3	102.3–112.3	worse	8,726
2008	108.6	101.9–115.2	worse	5,458
2009	78.5	71.5–85.5	better	4,062
2010	89.2	80.4–98.1	better (rough estimate)	3,280
2011	83.5	74.4–92.6	better (rough estimate)	3,333
2012	87.0	74.1–99.9	better (rough estimate)	2,067
2013	90.6	82.4–98.9	better	6,321
2014	100.4	91.9–109.0	no different	7,255
2015	89.6	80.5–98.6	better	6,653
2016	94.6	84.7–104.6	no different	6,109
2017	95.8	84.4–107.2	no different	4,923
2018	115.2	102.8–127.6	worse	5,092
2019	102.3	87.3–117.3	no different (rough estimate)	3,136
2020	85.2	59.1–111.2	no different (rough estimate)	925

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 77,496 (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 Cayman 2011 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-cayman/2011/

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.

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