2025 BYD Seal U Comfort DM-I Phev Auto 1.5L Hybrid electric · LC25 CSO

No MOT test history is currently recorded for this 2025 BYD SEAL U COMFORT DM-I PHEV, which is consistent with the vehicle being only one year old and therefore not yet subject to mandatory MOT testing under current DVSA regulations. Under standard UK requirements, vehicles do not require an MOT test until they reach three years of age from the date of first registration. As such, there is no recorded pass, fail, or advisory data available against which to evaluate a maintenance trend, and the absence of an MOT record should not be interpreted as a cause for concern in itself, but rather as a reflection of the vehicle's youth within the UK testing framework. The mileage for this vehicle is recorded as unknown, which prevents any meaningful assessment of annual usage rates or comparison against typical expectations for a modern plug-in hybrid family vehicle. A contemporary PHEV such as the BYD SEAL U would ordinarily be expected to accumulate between 8,000 and 15,000 miles per annum in private use, though the actual figure can vary significantly depending on whether the owner primarily runs the vehicle in electric mode for short commutes or undertakes longer journeys that engage the combustion engine more frequently. Without confirmed mileage figures, the prospective buyer has no baseline against which to assess wear progression on major mechanical components, and this gap in the record should be addressed through direct verification of the odometer reading and service documentation prior to purchase. Given the absence of MOT history and the limited age of the vehicle, the prospective buyer's inspection should focus primarily on those areas of concern that can arise from calendar-based degradation rather than mileage-based wear. Tyre condition warrants close attention, as even low-mileage tyres can develop sidewall perishing and cracking from environmental exposure over time, particularly if the vehicle has been stored outside. The 12-volt auxiliary battery, which is a common source of fault on modern electrified vehicles, should be tested for state of charge and load capacity, as a failing auxiliary battery can generate misleading fault codes and starting anomalies in hybrid and electric powertrains. The high-voltage traction battery and its associated cooling system should be inspected for any signs of degradation, and a diagnostic scan using BYD-compatible equipment is strongly recommended to confirm the health of the high-voltage pack and identify any stored fault codes relating to the hybrid powertrain, regenerative braking system, or charging infrastructure. The brake system on a PHEV that has seen predominantly low-speed electric operation is particularly susceptible to corrosion and caliper binding, as the regenerative braking function reduces reliance on the friction brakes, allowing disc surface corrosion to accumulate without being worn away through regular use. Any standing vehicle should be checked for binding calipers by attempting to push the vehicle on level ground with the handbrake released and listening for scraping or resistance from the wheels. Coolant, brake fluid, and transmission fluid will all degrade over time regardless of mileage, so service records confirming time-based fluid changes should be requested and verified. The suspension components, including coil springs, bushes, and anti-roll bar links, should be examined for any signs of premature wear or corrosion, particularly in areas where road salt exposure may have been a factor. Finally, the charging cable, domestic and public charging connectors, and the vehicle's charging port should be inspected for damage or contamination, and a full functional test of both charging modes and the vehicle's drive modes should be conducted during the test drive to confirm that the hybrid system transitions smoothly between electric and combustion operation under load.