PORSCHE CAYENNE (2021)
Running costs, common problems, and reliability data based on 4,115 real MOT tests in 2024.
MOT Pass Rate
95%
Total Tests (2024)
4,115
Avg Mileage
27,090 mi
Est. Annual Cost
£2,037
Is the 2021 PORSCHE CAYENNE reliable?
Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%.
At 3 years old, 95% of PORSCHE CAYENNEs from 2021 passed their MOT first time in 2024. That's based on 4,115 tests across the UK. The average mileage at this age is 27,090 miles.
How does the 2021 PORSCHE CAYENNE compare?
Mileage Analysis
The average 2021 PORSCHE CAYENNE has 27,090 miles on the clock, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a PORSCHE CAYENNE?
The most reliable year is the 2020 model with a 96% MOT pass rate, while the 2007 model has the lowest at 83%. The 2021 sits between the two at 95%.
How much does a 2021 PORSCHE CAYENNE cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
PORSCHE CAYENNE by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2022 | 96% | 83 | 24,282 mi |
| 2021 | 95% | 4,115 | 27,090 mi |
| 2020 | 96% | 7,136 | 34,631 mi |
| 2019 | 95% | 9,063 | 40,685 mi |
| 2018 | 93% | 5,310 | 51,571 mi |
| 2017 | 92% | 4,856 | 65,047 mi |
| 2016 | 92% | 7,333 | 71,856 mi |
| 2015 | 93% | 6,258 | 79,263 mi |
| 2014 | 91% | 5,626 | 86,652 mi |
| 2013 | 91% | 6,261 | 96,482 mi |
| 2012 | 89% | 5,233 | 104,317 mi |
| 2011 | 90% | 3,069 | 107,653 mi |
| 2010 | 89% | 2,126 | 113,736 mi |
| 2009 | 87% | 1,955 | 119,837 mi |
| 2008 | 86% | 1,384 | 109,907 mi |
| 2007 | 83% | 1,790 | 115,755 mi |
| 2006 | 86% | 2,242 | 118,992 mi |
| 2005 | 84% | 2,951 | 124,592 mi |
| 2004 | 84% | 2,598 | 125,338 mi |
| 2003 | 84% | 1,257 | 121,522 mi |
Checking a specific PORSCHE CAYENNE?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 PORSCHE CAYENNE
The 2021 PORSCHE CAYENNE is a luxury with a 2995cc petrol engine. 4,115 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 22% of all 2021 cars for reliability.
With an average of 27,090 miles at 3 years old, PORSCHE CAYENNE owners cover more miles than the average driver.
2021 PORSCHE CAYENNE Fuel Costs
The 2995cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 PORSCHE CAYENNE?
Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
PORSCHE CAYENNE Reliability Trend
Newer PORSCHE CAYENNEs show better MOT pass rates than older ones, with an average improvement of 7 percentage points.
Buying a Used 2021 PORSCHE CAYENNE
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. If you're flexible on year, the 2020 model has the highest pass rate at 96%.
Alternatives to the 2021 PORSCHE CAYENNE
The PORSCHE CAYENNE is actually the most reliable option among similar petrol luxurys from this era. Here are comparable petrol cars with similar engines:
- BMW 5 SERIES (2019) 92% pass rate (-3%) from 33,766 tests
- BMW X3 (2019) 92% pass rate (-3%) from 32,937 tests
- MERCEDES GLC (2019) 93% pass rate (-2%) from 30,341 tests
- BMW X5 (2019) 92% pass rate (-3%) from 23,506 tests