Porsche model reference
Porsche Cayenne
What our record holds on the Cayenne, sold in the UK since 2002: body styles, fuel types and the road tax a used one pays.
No reliability figure is published for the Porsche Cayenne that this site could cite. What circulates instead is survey data from panels that select themselves, and warranty claim rates published by companies with something to sell.
Any percentage would be our own calculation. Which years count, and whether a facelift and a new generation sharing the Cayenne name are one model or two, both move the answer, and neither choice is anybody official's.
So the field does not exist. We do not average the other Porsche models into a number and put it here, and we do not push a marque figure down onto the Cayenne. What is real and specific is the paperwork for one car.
No fault ordering is published for the Cayenne
A 2005 Cayenne S is well above 225 g/km and predates 23 March 2006, so band K applies at £445 a year in 2026/27.
That figure is a worked example for the year and engine named, not a rate for every Cayenne. Read the CO2 figure and the first registration date off the V5C before you budget, because both change the answer.
See every band for this tax yearStanding next to one
Buying a used Cayenne: what the record settles
Our record puts the Cayenne's UK sales period at since 2002. That range is the useful starting point, because everything about the cost of running one turns on where a particular example sits inside it. It came in one body style here, SUV, with 3 fuel types: petrol, diesel and plug-in hybrid.
The Cayenne was on sale on both sides of the road tax change of 1 April 2017, and that is the single most useful thing to know before you buy one. An example first registered up to 31 March 2017 is taxed on its CO2 figure under the lettered bands, so engine, gearbox and even wheel size can move two cars of the same year into different bands. One registered from 1 April 2017 pays the flat standard rate instead and its CO2 stops mattering. Two otherwise identical cars a year apart can cost noticeably different amounts to keep taxed, and only the V5C tells you which one you are looking at. There is also a quirk worth knowing on the oldest examples: a car registered before 23 March 2006 cannot be charged above band K however high its emissions, so a thirsty old one can be cheaper to tax than a newer car a class below it.
For running costs the fuel matters more than the badge. On the diesels the emissions section is where a neglected car loses its certificate: the particulate filter is inspected and the smoke reading is measured against a limit, and a filter that has never had a long run to clear itself will not pass on a good intention. A plug-in hybrid still takes the full emissions test on its engine, so ask when that engine last did a long run rather than a series of short electric trips. Four wheel drive versions carry more driveline than the two wheel drive ones. Driveshaft boots, propshaft joints and the extra bushes are all inspected, and they are the items that turn a cheap purchase into an expensive first year.
None of that is a substitute for the record of the actual car. The invoices name what was replaced, when and at what mileage, and the same job appearing twice in three years says more about a Cayenne than any statistic about the model ever could. A mileage that goes backwards across a paperwork trail is worth walking away from whatever the badge is.
Porsche Cars Great Britain was set up in the 1960s and Britain is now one of its largest markets outside Germany and China. The Cayenne and Macan account for most of its volume here, not the 911, and that is what fills its used forecourts. Bore scoring on the early water cooled flat six engines and coolant pipe failures on the first generation Cayenne are the two faults worth a specialist inspection. That is context on the marque rather than on this car, and there is more of it, along with every other model line, on the Porsche page.