At the present date of September 2026, this 2025 BYD Seal U Boost DM-i has no DVSA MOT history because, as a vehicle first registered in 2025, it is not yet three years old and its first statutory MOT test will not fall due until approximately 2028. Consequently, there is no latest test outcome to report and no pattern of advisories or failure points from which to judge whether the vehicle's condition is stable, worsening, or improving. This absence of data is entirely normal for a vehicle of this age rather than a cause for concern, but it does mean the buyer cannot lean on official defect history and must instead scrutinise the manufacturer service record, dealer invoices, and any outstanding safety recall notices issued by BYD. I would advise verifying recall completion through a BYD franchised dealer before purchase, as new models in their first production years are more likely to carry software or component campaigns.
The recorded mileage is stated as unknown, which is typical of a vehicle too young to have entered the MOT system, since DVSA mileage records only accumulate at test. As a rough benchmark, a 2025 plug-in hybrid driven an average annual distance would have covered in the region of 15,000 to 18,000 miles by now, though many Seal U owners bought specifically for short electric commutes and may have accumulated far less. The buyer should cross-check the odometer against the V5C logbook, service invoices, and any journey data retained within the BYD companion application to confirm consistency and rule out clocking. A genuinely low mileage on a hybrid of this type brings its own considerations, namely friction brakes that have rarely been exercised because the regenerative braking system does most of the retardation work, whereas unusually rapid accumulation would point instead towards accelerated wear of suspension bushes, tyres, and engine ancillaries.
Given the sparse official record, the physical inspection should be tailored to a young plug-in hybrid that may have spent considerable time standing or operating on electric power alone. Inspect all four tyres for age-related perishing and sidewall cracking regardless of tread depth, confirm even wear across the contact patch, and check for mismatched replacements. Examine the brake discs for rust ridging, lipping, or surface corrosion consistent with infrequent friction braking, and confirm the discs turn freely without binding calipers. Assess the condition of the 12V auxiliary battery, which suffers if the car sits unused, and inspect the Type 2 charging socket and cable for heat discolouration, bent pins, or debris ingress. Underneath, look for coolant staining around the battery thermal management circuit, any weeping from the 1.5-litre petrol engine, and damage or corrosion to the underbody. Verify that the service book carries time-based stamps even at low mileage, as coolant, brake fluid, and engine oil degrade on the calendar rather than solely on distance, and confirm the remaining manufacturer warranty, including the traction battery coverage, is intact and transferable.
On the test drive, run the car from cold and listen for the transition between electric and petrol operation, which should be seamless without harsh shudder, hesitation, or abnormal engine noise. Note whether any warning lamps illuminate, particularly the hybrid powertrain, EV system, or ABS indicators, and confirm the heating, ventilation, and air conditioning perform correctly. Over uneven surfaces, listen for suspension clunks or knocking that would suggest worn drop links or bushes, and during braking, feel for pulsation through the pedal indicating distorted or corroded discs, as well as any grabbing or drag on light application. If practical, complete a full charging cycle on a public or home point to confirm the onboard charger and battery management system operate without fault, and ideally commission a pre-purchase inspection with a hybrid-qualified technician, alongside an HPI check for outstanding finance or accident history, to substitute for the reassurance that early MOT data cannot yet provide.