2025 BYD Seal U Boost DM-I Phev Auto Hybrid electric (clean) · SD75 BVR

At the time of this assessment dated 1 September 2026, no DVSA MOT test history is available for this 2025 BYD SEAL U BOOST DM-I PHEV AUTO. The vehicle, being a 2025 model year, would not ordinarily require its first MOT test until three years after first registration, placing the earliest compulsory test at some point during 2028. Consequently, the absence of MOT records is entirely expected and does not, in itself, indicate any mechanical concern. There are no failure points, advisories, or wear-related defects on file to evaluate, so any trend analysis of roadworthiness is limited to manufacturer warranty cover and the pre-delivery inspection record rather than statutory test data. The recorded mileage is described as unknown, and there is insufficient mileage data to compare against the vehicle's age. For a first-year PHEV of this type, annual mileage in the UK typically averages between 8,000 and 12,000 miles, though plug-in hybrid vehicles are sometimes used more sparingly if owners rely predominantly on electric-only running for shorter commutes. Without odometer verification, it is not possible to confirm whether this example has been driven frequently on long combined trips or has covered relatively low miles with extended standing periods. Both scenarios carry distinct mechanical implications, which warrant careful physical inspection at the point of purchase. Given that the car is only around one year old, most wear-related components should remain within manufacturer tolerances. Nevertheless, a prospective buyer should carry out a focused inspection regardless of the lack of MOT data. Tyres should be examined for sidewall cracking or perishing, which can affect even nearly new rubber, particularly if the vehicle has stood outdoors for prolonged periods. The 12-volt auxiliary battery, which supports the vehicle's control electronics, should be load-tested, as premature failure is not uncommon in modern vehicles that sit unused. Brake discs should be checked for surface corrosion from standing, and the calipers confirmed as free-moving to prevent binding. Coolant, brake fluid, and the PHEV-specific transmission fluid should be inspected for age-related degradation in line with the manufacturer's service schedule, and the high-voltage battery state of health should be verified through the dealer diagnostic system where possible. On a test drive, particular attention should be paid to the transition between electric and hybrid modes, ensuring smooth engagement without warning lights or unexpected vibrations. Any clunks from the suspension over undulations, pulling under braking, or warning messages relating to the hybrid system, emissions, or battery management would warrant immediate dealer-level diagnostics. It is also prudent to confirm that the service book is stamped in accordance with the prescribed schedule and that any remaining manufacturer warranty, particularly the high-voltage battery cover, is documented and transferable. In summary, the absence of MOT history is normal for a 2025 vehicle, and a satisfactory outcome will depend largely on verifying time-based service items and confirming the health of the hybrid powertrain through dealer records.