2026 BYD Seal U Boost DM-I Phev Auto 1.5L Hybrid electric · MT26 FSL

As of the September 2026 evaluation, this 2026 BYD SEAL U BOOST DM-I PHEV has no recorded DVSA MOT history, which is entirely consistent with its recent registration. UK legislation requires a first MOT test once the vehicle reaches three years of age, meaning this example would not be due for its initial statutory roadworthiness examination until 2029. Consequently, there are no official pass or fail outcomes, advisories, or recorded defect patterns to assess at this stage, and it is not possible to evaluate any long-term maintenance trend from the DVSA database. Mileage data has not been supplied with the vehicle record, which prevents a meaningful comparison between usage and the vehicle's age. For a model that is effectively in its first year of registration, the primary concern is not excessive wear from high mileage but rather the potential pitfalls associated with a brand-new or nearly new plug-in hybrid powertrain. Any prospective buyer should request the current odometer reading and ensure it aligns with the delivery date and any documented pre-delivery inspection or running-in service. Verify that the service book, whether digital or paper, has been correctly stamped or updated, and confirm that the high-voltage battery state of health and the combustion engine running-in schedule have been observed according to BYD's manufacturer recommendations. Given the absence of an MOT history, a physical inspection should focus on verifying that the vehicle is operating as intended from new rather than searching for accumulated wear. Check that all dashboard warning lamps, particularly those relating to the hybrid system, high-voltage battery management, and tyre pressure monitoring system, illuminate correctly during ignition and extinguish once the vehicle is running. On a test drive, listen for any irregular noises from the engine as it cuts in and out under hybrid operation, and ensure that the transition between electric and petrol propulsion is seamless without shuddering or excessive vibration. Inspect the charging port and cable for any signs of damage or scorching, and verify that the infotainment and driver assistance systems function without persistent fault messages. Additional checks should include a thorough inspection of the tyres for any manufacturing defects or uneven wear patterns, as early issues with wheel alignment or balancing can present quickly on a new vehicle. Examine the brake discs for any surface corrosion, as even low-mileage vehicles can develop light oxidation on the braking surfaces if they have been left standing for extended periods, particularly during transit or storage prior to delivery. Confirm the condition and charge state of the 12-volt auxiliary battery, which is essential for starting the hybrid system and supporting ancillary electronics. While time-based fluid degradation is unlikely to be a concern at this stage, it is prudent to verify that the coolant, brake fluid, and gearbox oil have been filled to the correct levels and that there are no leaks from the underbody protection panels when the vehicle is inspected on a ramp.