2025 BYD Dolphin Design EV Electric · WD75 BGF

The DVSA database contains no MOT entries for the 2025 BYD Dolphin Design EV, meaning the vehicle has never undergone a formal road‑worthiness test since its first registration. Consequently there is no test‑date trend to evaluate; the absence of recorded failures or advisories simply reflects that the vehicle is still within the three‑year MOT exemption period applicable to new cars, rather than indicating any particular maintenance direction. Mileage information is not supplied, so a quantitative comparison with the vehicle’s two‑year age cannot be made. In the absence of recorded kilometres, a prospective buyer should assume that the Dolphin may have experienced either very low annual usage – typical of a commuter‑only EV – or a higher‑than‑average run‑off‑road profile if it has been employed for fleet duties. Low mileage would generally imply less wear on tyre tread and brake components but could also point to prolonged periods of inactivity, which can promote battery cell imbalance, tyre sidewall perishing and brake disc corrosion. Conversely, high mileage would suggest greater wear on suspension bushings, tyre tread depth and the thermal‑management system, and would raise the importance of confirming that the high‑voltage battery has been regularly cycled and kept within optimal state‑of‑charge windows. For a vehicle of this age and with no MOT record, the buyer should focus on age‑related, time‑based inspections. Verify that the tyre sidewalls are free of cracking, dry rot or excessive hardening, as rubber degrades even when the tread is relatively unworn. Examine the wheel arches and under‑body for any signs of corrosion, particularly around the battery pack mounting points and the front sub‑frame, where moisture can accumulate during winter storage. Inspect the 12‑volt auxiliary battery for terminal corrosion and test its cranking voltage, as a weak starter battery can affect electronic control module operation. Check that the high‑voltage battery management system has been serviced according to BYD’s schedule, and request a state‑of‑health report to confirm that capacity loss is within warranty limits. Ensure the charging inlet, cable, and on‑board charger are free of debris and that the vehicle accepts a full charge without error codes, as connector wear or coolant‑system blockages can manifest as intermittent charging faults. During a test drive, listen for any abnormal whine or grinding from the electric motor and reduction gear, which may indicate bearing wear or lubrication failure. Observe the acceleration response for any hesitation or loss of torque, especially under load, as this can be a symptom of battery cell imbalance or thermal‑management degradation. Pay attention to the regenerative‑braking feel; a sudden change in pedal feel or a pulsating sensation can point to brake disc corrosion or uneven pad wear. Finally, confirm that all driver‑assist warnings, battery‑temperature alerts and charging‑status messages disappear after a short drive, indicating that the vehicle’s electronic diagnostics are functioning correctly and that there are no latent fault codes awaiting service. A comprehensive independent EV inspection, together with a full service history and any recall documentation, will provide the most reliable basis for a purchase decision.