Porsche Cayenne 2004: MOT failure rate for its age

29.2% of 8,144 MOT tests of the Porsche Cayenne first registered in 2004 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 105.5 (95% CI 101.2–109.7; 100 = normal for this model at that age): the 2004 Porsche Cayenne fails more often than other build years of the same model at the same age.

Porsche Cayenne built in 2004 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	29.2	%	all ages tested	2019–2024	8144
Index against this model at the same age (95% CI 101.2–109.7)	105.5	index	100 = normal for this model at that age	2019–2024	8144
Rank among this model's 18 build years	15	of 18	1 = fails least for its age	2019–2024	8144
Tested in 2024	1087	tests	median 125,242 miles	2024	1087

Built 2004 against Porsche Cayenne normal for the age: first-time MOT failure share at each age, age 15: 29.7% vs 28.6%; age 16: 28.6% vs 27%; age 17: 28.4% vs 28%; age 18: 29.4% vs 26.8%; age 19: 28.9% vs 27.3%; age 20: 30% vs 28.1%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2004 Porsche Cayenne by registration · All Porsche Cayenne 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 2004 Porsche Cayenne fail at each age?

Cars built in 2004 were tested at ages 15 to 20 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 Cayenne built 2004: 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)
15	1,681	29.7	27.6–32	28.6	103.9
16	1,445	28.6	26.3–31	27	105.9
17	1,385	28.4	26.1–30.9	28	101.5
18	1,345	29.4	27–31.9	26.8	109.8
19	1,201	28.9	26.4–31.5	27.3	106
20	1,087	30	27.3–32.8	28.1	106.8

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 8,144 (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 2004 Porsche Cayenne?

The most common failure group on cars built in 2004 is lamps, reflectors and electrical equipment: 32.4 items per 100 first tests, against 9.7 across all build years of the Porsche Cayenne. These counts are not age-adjusted: cars built in 2004 were tested at ages 15 to 20.

Failure items per 100 first tests, Porsche Cayenne built 2004 against the Porsche Cayenne in all build years (2019–2024, not age-adjusted)
Failure group	Built 2004, per 100	All build years, per 100	Items
Lamps, reflectors and electrical equipment	32.4	9.7	2,637
Brakes	13.9	4.7	1,134
Visibility	10.5	5.6	856
Tyres	8.8	7.5	720
Suspension	6	3.6	486

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 8,144 (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 2004 compare with the years around it?

Among the 18 published build years of the Porsche Cayenne, 2004 ranks 15 (1 = fails least for its age). 2003: index 99.7. 2005: index 102.0.

Porsche Cayenne build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2003	99.7	94.1–105.4	no different	4,217
2004	105.5	101.2–109.7	worse	8,144
2005	102.0	98.0–106.0	no different	9,132
2006	97.9	93.0–102.8	no different	6,085
2007	105.3	99.4–111.2	no different	4,691
2008	101.1	94.4–107.8	no different (rough estimate)	3,756
2009	113.2	107.1–119.4	worse	5,335
2010	93.8	88.2–99.5	better	5,669
2011	96.3	91.1–101.5	no different	7,593
2012	100.1	95.7–104.4	no different	11,982
2013	101.4	97.1–105.7	no different	13,217
2014	96.6	91.8–101.3	no different	11,536
2015	101.1	96.6–105.7	no different	14,577
2016	110.3	105.8–114.9	worse	17,243
2017	107.0	100.8–113.2	worse	9,961
2018	103.9	96.7–111.0	no different	7,618
2019	69.5	64.1–74.9	better	9,613
2020	74.8	66.6–83.0	better	4,855

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 155,224 (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 Cayenne 2004 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-cayenne/2004/

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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