2025 BYD Seal U Comfort DM-I Phev Auto 1.5L Hybrid electric · AF75 OCU

The 2025 BYD Seal U Comfort DM-i PHEV presents no recorded DVSA MOT test history at present, which is entirely consistent with its first-year-on-the-road age. Under current UK legislation, a vehicle does not require its initial MOT test until it reaches three years of age, meaning this BYD will not be due for statutory inspection until 2028. Consequently, there is no official pass or failure outcome to evaluate, and no trend of maintenance quality can be derived from the data. The absence of an MOT record should not be interpreted as a negative indicator; rather, it simply reflects a vehicle that remains within its manufacturer-supported period and has yet to reach the threshold for mandatory roadworthiness testing. Regarding mileage assessment, no odometer reading has been supplied and there is no comparable MOT data against which to benchmark annual usage. The BYD Seal U is a 2025 model plug-in hybrid, and such vehicles often cover variable annual mileages depending on whether they are predominantly used for short urban electric commuting or longer mixed journeys that engage the petrol range-extender more regularly. Without confirmed mileage, it is essential that the prospective buyer verifies the current odometer reading against the warranty and service schedule requirements. Equally important is establishing whether the vehicle has been used regularly or has stood for extended periods, as both extremes carry distinct mechanical implications for a PHEV powertrain. Given that this vehicle is approaching one year of age and carries no MOT history, the buyer inspection should focus predominantly on items that degrade through calendar age rather than wear from use. Tyres should be carefully examined for sidewall perishing and cracking, as rubber compounds harden and deteriorate through oxidation even on low-mileage vehicles, and particular attention should be paid to the rear tyres which on a front-drive-biased PHEV may show uneven shoulder wear if the electric and combustion systems have been operating in an imbalanced manner. The 12V auxiliary battery and the high-voltage traction battery state of health should be verified through the diagnostic system, as prolonged standing or shallow cycling can compromise lithium-ion cell balance. Brake discs and calipers on a vehicle used predominantly in electric mode may exhibit surface corrosion or binding due to infrequent mechanical braking application, so a test drive should include firm pedal applications to confirm smooth retardation without shudder or grinding. Fluid condition and service provenance warrant close scrutiny on a calendar-based schedule irrespective of recorded mileage. Engine oil, coolant, transmission fluid, and brake fluid all degrade through chemical ageing, moisture absorption, and additive depletion, and the buyer should confirm that the manufacturer’s time-based service schedule has been adhered to rather than relying purely on a mileage trigger. Verify the digital or physical service record to ensure that the initial inspection, typically required at twelve months or ten thousand miles, has been completed by an authorised agent to preserve the remaining manufacturer warranty. During the test drive, listen for any unusual noises from the suspension over uneven surfaces, which would suggest compromised components despite low mileage, and ensure that the transition between electric and hybrid modes is seamless without warning lights or hesitation. Finally, confirm that all charging equipment, including the Type 2 cable and any wall box installation history, is present and functional, as missing accessories on a PHEV can represent a notable post-purchase rectification cost.