Where each one leads
BMW X5
- On Canada's official test the most frugal 2026 BMW X5 uses 9.4 l/100 km, the 2026 Porsche Cayenne 12.2.
- New BMW X5 cars registered in Europe in 2022 average 113 g/km of CO₂ on the WLTP test, against 250 for the Porsche Cayenne in 2022.
Porsche Cayenne
- Against cars of the same age, the Porsche Cayenne comes out better at its first MOT test (passes 16% more often than average) than the BMW X5 (passes 10% more often than average).
- Against cars of the same year, the Porsche Cayenne comes out better in New York safety inspections (fails 55% less often than average) than the BMW X5 (fails 50% less often than average).
- Fewer Porsche Cayenne cars in the Netherlands carry an illogical odometer record (2.8% against 3.4%).
- Measured by the cars' own fuel meters, the petrol Porsche Cayenne uses 13.1 l/100 km on the road, the BMW X5 14.8.
Only measures that do not depend on how many cars were sold: pass and failure rates against cars of the same age, ratings, fuel use and CO₂. How we compare
At a glance
| BMW X5 | Porsche Cayenne | |
|---|---|---|
| Model years in the US safety record | 1999–2026 | 2003–2026 |
| New cars registered in Europe | 367,747 (2010–2022) | 52,584 (2010–2022) |
| Licensed in the United Kingdom | 106,389 | 40,392 |
| On the road in the Netherlands | 27,193 | 15,174 |
| In traffic in Finland | 111 | — |
EEA new-car registrations (CC BY 4.0) · DVLA licensed vehicles (OGL v3.0) · RDW (CC0) · Traficom (CC BY 4.0) · generations: Wikidata (CC0).
Reliability and problems
| BMW X5 | Porsche Cayenne | |
|---|---|---|
| UK MOT first-time pass rate | 78% | 84% |
| … against cars of the same age | +10% | +16% |
| New York safety inspections failed | 0.7% | 0.6% |
| … against cars of the same year | −50% | −55% |
| Illogical odometer records (NL) | 3.4% | 2.8% |
| US owner complaints | 3,165 | 506 |
| Most complaints about | Engine | Power train |
| Model year with most complaints | 2012 (271) | 2014 (53) |
| US recall campaigns | 103 | 27 |
| Manufacturer service bulletins | 5,465 | 6,986 |
| NHTSA defect investigations | 22 | 11 |
Complaint, recall and bulletin counts grow with the number of cars sold and are not adjusted for it. UK MOT: DVSA anonymised MOT results (OGL v3.0); New York: DMV inspections; complaints, recalls, bulletins and investigations: NHTSA (public domain); odometer: RDW (CC0).
Safety
| BMW X5 | Porsche Cayenne | |
|---|---|---|
| NHTSA overall rating | 4★ (2026) | — |
NHTSA New Car Assessment Program, most recent rated model year (public domain).
Fuel, emissions and price
| BMW X5 | Porsche Cayenne | |
|---|---|---|
| Official combined fuel use, Canada | 9.4 l/100 km (2026) | 12.2 l/100 km (2026) |
| Real-world use in Europe, diesel hybrid | 9.1 l/100 km | — |
| Real-world use in Europe, petrol hybrid | 12.4 l/100 km | — |
| Real-world use in Europe, diesel | 9.0 l/100 km | — |
| Real-world use in Europe, petrol | 14.8 l/100 km | 13.1 l/100 km |
| Official CO₂ of new cars in Europe | 113 g/km | 250 g/km |
| Average power of new cars in Europe | 220 kW (295 hp) | 253 kW (340 hp) |
| Average mass in running order | 2,389 kg | 2,125 kg |
| Dutch list price when new (median) | €111,371 | €136,247 |
| Average odometer in Finland | 218,000 km | — |
Canada: NRCan Fuel Consumption Ratings, most frugal version of the latest year (OGL Canada). Europe: EEA monitoring of new-car CO₂ and on-board fuel meters (OBFCM), CC BY 4.0. Price: RDW catalogue price (CC0). Finland: Traficom (CC BY 4.0).