Photo: Alexander-93, CC BY-SA 4.0, via Wikimedia Commons
3 faults documented by at least two sources, listed by version then by mileage at onset when known.
3 known faults
A testimony published by Tesla-Mag describes unexpected restarts and sometimes unstable infotainment functions, often fixed by software updates. An ev.care guide (focused on India) reports a rotating screen that can slow down, freeze or restart, largely resolved by an update or a reset; Autodoc also covers software problems on the Seal.
Australian Car Reviews describes 2023-2024 Seals that went dead despite a healthy high-voltage battery, attributed to the original 12 V battery and to a DC-DC converter charging at about 13.8 V instead of 14.4 V or more. Two owners report on the BYD forum a failure in the days following delivery (a “LV Protection System Fail” message in one case), with no cause confirmed by the workshop.
Australian Car Reviews reports, on 2023-2025 Australian Seals (Premium RWD and Performance AWD), vibrations under hard acceleration attributed to a manufacturing defect in the rear driveshafts, with a technical bulletin to dealers and replacement of both shafts. EVparts4x4 also notes a sometimes jerky response from the drivetrain. No documented case for France.
A testimony published by Tesla-Mag describes unexpected restarts and sometimes unstable infotainment functions, often fixed by software updates. An ev.care guide (focused on India) reports a rotating screen that can slow down, freeze or restart, largely resolved by an update or a reset; Autodoc also covers software problems on the Seal.
Australian Car Reviews describes 2023-2024 Seals that went dead despite a healthy high-voltage battery, attributed to the original 12 V battery and to a DC-DC converter charging at about 13.8 V instead of 14.4 V or more. Two owners report on the BYD forum a failure in the days following delivery (a “LV Protection System Fail” message in one case), with no cause confirmed by the workshop.
Australian Car Reviews reports, on 2023-2025 Australian Seals (Premium RWD and Performance AWD), vibrations under hard acceleration attributed to a manufacturing defect in the rear driveshafts, with a technical bulletin to dealers and replacement of both shafts. EVparts4x4 also notes a sometimes jerky response from the drivetrain. No documented case for France.
An OBD scanner plugged in under the steering wheel shows stored fault codes, even with warning lights off: useful during the test drive.
Compare prices of parts for the BYD Seal I (timing, brakes, filters) to estimate the repairs to plan for.