MOT fail rates by first-use year

2004 Porsche Cayenne MOT fail rate and common faults

How Porsche Cayenne cars first used in 2004 did at their MOTs from 2022 to 2024, against all cars of the same age. From 3,693 DVSA MOT tests of these cars. First use is usually the date the car was first registered.

MOT data updated 28 September 2026

At 20 years, tested in 2024

MOT fail rate at age 20 (n=1,112)29.7%

All cars at 20 years (n=1,845,952)42.8%

Difference−13.1 pts

MOT tests of 2004 cars, 2022 to 20243,693

What stands out

In 2024, at 20 years old, Porsche Cayenne cars first used in 2004 failed 29.7% of MOTs (1,112 tests), 13.1 points below the 42.8% for all cars that age.
From 2022 to 2024, as these cars went from 18 to 20 years old, the fail rate moved from 29.0% to 29.7%.
The most common fail item that is not a wear item, for the Porsche Cayenne at 20 years, is airbag (SRS) warning light on, at 2.2 per 100 MOTs (all cars: 1.4).

MOT fail rate by test year

Porsche Cayenne cars first used in 2004: share of MOT tests that failed, by test year, against all cars of the same age. Years with fewer than 1,000 tests are not shown.
Test year	Age	MOT fail rate	Tests (n)	All cars	Difference
2022	18 years	29.0%	1,363	43.3%	−14.3 pts
2023	19 years	28.5%	1,218	43.2%	−14.7 pts
2024	20 years	29.7%	1,112	42.8%	−13.1 pts

Most common faults at 20 years

These figures cover all Porsche Cayenne MOTs at 20 years: cars first used 2003 to 2005, tested 2022 to 2025 (n=2,921). The list uses every first-use year so it has enough tests. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.

MOT fail items

Fail item	Per 100 MOTs	All cars
Side/position light not working Wear	3.9	5.2
Wipers not clearing screen Wear	2.7	3.4
Brake light not working Wear	2.5	3.9
Headlamp aim: projected beam image is obviously incorrect Wear	2.5	4.0
Individual direction indicators: not working Wear	2.4	0.5
Dipped headlight not working Wear	2.4	1.9
Airbag (SRS) warning light on	2.2	1.4
Engine warning lamp at the petrol emissions check: not working or showing a fault	1.9	2.5
Tyre tread below 1.6 mm Wear	1.7	2.6
Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits	1.6	1.5

Per 100 of the MOTs above (n=2,921). A test with two items counts once for each.

Advisories

Advisory	Per 100 MOTs	All cars
Tyre tread close to the legal limit or worn on the edge Wear	14.8	15.7
Brake discs: worn, pitted or scored, but not seriously weakened	11.9	10.7
Sub-frame: corroded but not seriously weakened	9.8	4.8
Engine oil leaks: leak, but not excessive	8.3	14.1
Brake pads wearing thin Wear	6.0	5.7
Suspension arm: corroded but not seriously weakened	6.0	3.0
Tyre condition: slightly damaged/cracking or perishing Wear	5.5	10.2
Suspension pin or bush worn, without excessive movement	5.4	7.7
Flexible brake hoses: slightly deteriorated	5.4	2.2
Registration plate lamp(s): inoperative in the case of multiple lamps or light sources Wear	4.7	5.4

Per 100 of the MOTs above (n=2,921). A test with two items counts once for each.

Fuel type at 20 years

These figures cover all Porsche Cayenne MOTs at 20 years: cars first used 2003 to 2005, tested 2022 to 2025 (n=2,921). Each fuel is set against all cars of the same fuel and age. Fuels with fewer than 1,000 tests are not shown.

Fuel	Share of tests	MOT fail rate	Tests (n)	All cars, same fuel	Median mileage
Petrol	100.0%	28.3%	2,880	42.5%	121,768 miles

Car tax rules for a 2004 car

Cars first registered from 1 March 2001 to 31 March 2017 are taxed by CO2 emissions band, from band A (the lowest emissions) to band M. The band is set by the CO2 figure on the V5C logbook.

These are the rules, not the amount for a specific car. Car tax check

ULEZ and clean air zones

Many petrol cars first registered from 2001 to 2005 already meet Euro 4, but not all of them. For a 2004 petrol car the Euro standard of that car decides.
Diesel cars first registered before September 2015 usually do not meet Euro 6, so a 2004 diesel usually pays the ULEZ daily charge. A few models met Euro 6 early.
Hybrids follow the Euro standard of their petrol or diesel engine.
The clean air zones in Birmingham and Bristol use the same Euro 4 petrol and Euro 6 diesel standards. The low emission zones in Scotland use them too, but enforce them with fines, not a daily charge.

The Euro standard of the car decides, not the year alone. ULEZ checker

Other years of the Porsche Cayenne

2005 Porsche Cayenne

Other Porsche models first used in 2004

Model	Age at test	MOT fail rate	Tests (n)	All cars
Porsche 911 (2004)	21 years in 2025	15.4%	2,461	42.1%
Porsche Boxster (2004)	21 years in 2025	24.0%	2,012	42.1%

More on the Porsche Cayenne

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

Found one you might buy? Vet the specific car.

These figures describe 2004 Porsche Cayenne cars as a group, not any one car. The VetTheCar Buying Report looks at the car you are buying: its MOT history, what similar cars did next, and what to ask the seller.

See an example Buying Report All car tools

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources

Car tax and clean air zone rules are summarised from GOV.UK and Transport for London guidance. They are general rules and are not drawn from the MOT data.