2025 BYD Seal U Comfort DM-I Phev Auto 1.5L Hybrid electric · AF25 MVL

As this BYD SEAL U is a 2025 registration, no MOT test has yet been conducted and consequently no failure points, advisories, or defect history is recorded on the DVSA system. The first statutory roadworthiness test for a vehicle of this age will only become due three years from its date of first registration, meaning that there is no prior MOT data upon which to assess a maintenance trend, either stable, worsening, or improving. In the absence of any official test history, the prospective buyer is entirely reliant upon the vendor's documented service record, pre-delivery inspection paperwork, and any manufacturer warranty claims to verify that the vehicle has been correctly maintained from new. Particular attention should be paid to ensuring that the high-voltage battery pack, hybrid powertrain control systems, and the regenerative braking function have all been signed off in accordance with BYD's prescribed service schedule. With the recorded mileage described as unknown and insufficient data available to compare annual usage against the vehicle's age, it is not possible to determine whether this PHEV has been utilised for high-mileage motorway commuting, predominantly short urban trips, or has been subject to extended periods of standing. This is a particularly significant consideration for a plug-in hybrid, as the mechanical implications of low usage differ markedly from those of high accumulation. Low annual mileage frequently results in the 12V auxiliary battery degrading prematurely due to insufficient charging cycles, brake discs and calipers corroding or binding from lack of use, and the high-voltage traction battery losing state of charge through natural discharge. Conversely, high mileage will more rapidly consume consumable items such as tyres, brake pads, and fluid services, and may place greater strain on the plug-in hybrid powertrain components. The buyer is therefore advised to scrutinise the in-car odometer reading against any available service invoices and to verify the recorded mileage with BYD's main dealer network using the vehicle identification number. Given the absence of any MOT history and the limited verifiable data, the prospective buyer must undertake a thorough physical inspection appropriate to a nearly new PHEV. The tyres should be examined for any signs of sidewall perishing, cracking, or uneven wear, particularly if the vehicle has been left standing for prolonged periods, as age-related rubber degradation can occur independently of tread depth. The brake calipers and discs should be inspected for surface corrosion and signs of seizing, which is common on low-use vehicles and may manifest as a pulling sensation or vibration under braking on the test drive. The 12V battery should be load-tested to confirm its state of health, and the high-voltage charging cable and port examined for any signs of damage or overheating. The test drive itself should be used to evaluate the transition between electric and hybrid propulsion modes, listening for any abnormal noises from the petrol engine when it engages, and ensuring that the regenerative braking system operates smoothly across its selectable levels. The cooling system, including the radiators serving both the combustion engine and the battery thermal management circuit, should be inspected for leaks or staining, and all fluid levels, including brake fluid, coolant, and gearbox oil, should be verified as being within specification and free from contamination. As a 2025 model, the vehicle should remain under the balance of BYD's manufacturer warranty, but the buyer is strongly advised to confirm the warranty status, obtain a full HPI check, and arrange an independent pre-purchase inspection by a qualified hybrid and electric vehicle specialist to ensure the powertrain, high-voltage battery, and associated control electronics are functioning correctly before committing to the purchase.