2017 Porsche Cayenne 4.1L Diesel · SY67 BVA

The 4.1-litre diesel Cayenne typically returns around 30-35 mpg in mixed use, dropping into the low 20s under load. Road tax sits in a higher band given the engine capacity exceeding 4,000cc, and insurance is likely to be in group 45-50 territory given the performance and value of the vehicle. Routine servicing at a specialist will easily run into four figures for major intervals.

Estimated annual running costs including fuel, tax, insurance, and routine maintenance are likely to fall in the £3,200-£4,200 range for a vehicle of this age and mileage profile. This is significantly higher than mainstream SUVs and should be budgeted realistically. Set aside a further £1,000-£2,000 annually as a contingency reserve for the kind of component failures common to premium German diesels.

On inspection, pay particular attention to the tyres — the most common MOT failure point across this model — checking for uneven wear which can indicate suspension or alignment issues. Inspect brake pads and discs closely, as these are the second and third most common failure categories. Listen for any diesel-specific concerns such as timing chain rattle on cold start, excessive smoke, or AdBlue warning messages on the dashboard.

Given the very low recorded annual mileage of around 870 miles per year, the DPF may be at risk of clogging due to insufficient high-speed running. Check the DPF condition via diagnostic read and confirm the vehicle has been regularly driven on dual carriageways or motorways. Inspect for oil leaks from the engine and around the turbocharger area, and verify the four-wheel-drive system engages correctly on a test drive. Finally, confirm the mileage reading against the MOT certificate at the 2025 test and cross-check with any service invoices available.