The BYD Seal is a battery-electric saloon with a single-speed drive (no conventional gearbox) and strong focus on efficiency and tech; a petrol listing is almost certainly a data-entry error. BYD offers different battery/trim choices and a manufacturer battery warranty — confirm which battery pack and reported WLTP/real-world range apply to the car you’re looking at, and check the car’s declared maximum DC charging rate and charging connector (CCS). Expect lower routine servicing costs than a petrol car, but software and battery health checks are important on handover.

• Battery state-of-health report (available from dealer) and recent charger-to-charger range figures — confirm usable range matches the advertised trim.
• CCS charging socket and DC fast-charge function: plug in and verify the car accepts charge and shows correct max kW rate.
• ADAS cameras/sensors and lane-keeping calibration: walk around bumpers and inspect cameras for damage and that lane-keep functions work on a short road test.
• Tyre age and spec (some new EVs sit on older tyres) and condition of brake-by-wire/regenerative braking settings during a test drive.
• Paperwork and VIN: ensure the registration documents, spec sheet and online listing correctly state 'electric' and include the battery warranty details.