BYD Tang Rear Motor Assembly Detachment: Caused by Severe Undercarriage Impact While Driving Through Water

Recently, a video surfaced showing a black BYD Tang SUV driving through flooded streets in Shenyang, with its rear motor assembly detached from the undercarriage and being dragged through the water while still connected to the vehicle body via an orange high-voltage wiring harness. In response, BYD stated that the incident occurred due to severe underbody impact during wading, where external force caused the rear motor assembly to detach. The company emphasized that this was not due to any inherent product quality issue, nor did the component detach spontaneously under normal driving conditions. Details regarding the specific model year of the involved vehicle, the exact location of chassis damage, and repair status have not yet been disclosed. BYD has previously addressed the water-fording capabilities of its new energy vehicles, noting that pure electric vehicles theoretically outperform gasoline-powered cars in flood conditions because they lack engine air intake and exhaust systems—provided the battery pack meets required sealing standards. BYD’s Blade Battery packs are rated IP67 or IP68, meaning they can remain submerged in one meter of water for up to 24 hours without catching fire or leaking electricity. However, the company also stressed that even with such waterproof ratings, drivers should avoid entering deep water of unknown depth. When floodwater exceeds half the height of the tires, vehicles should detour to ensure driving safety.