Air-conditioners in Dolphin cars from BYD (1211) are emitting a white powder, prompting more than 500 complaints to the mainland automaker.
BYD said the powder spray was caused by abnormalities in air-con evaporators and claimed it would not cause harm if inhaled as the main component of the powder is aluminum hydroxide, used as a stomach medicine. It forms mainly in large particles. BYD's Dolphin cars are priced between 102,800 yuan (HK$112,940) and 130,800 each.
Also facing problems is Tesla, which is recalling more than 321,000 vehicles in the United States as their tail lights may sometimes fail to illuminate.
That follows a recall on Friday of nearly 30,000 Model X cars in the United States over the front passenger airbag deploying incorrectly, which sent its shares down almost 3 percent to a near two-year low.
In a filing with the National Highway Traffic Safety Administration, the EV manufacturer said the tail light-related recall covers some Model 3 and Model Y vehicles.
Tesla said the recall followed complaints it heard about in October, largely in foreign markets, claiming tail lights were not illuminating.
The investigation found in rare cases lights may not work intermittently due to an anomaly causing false fault detections during a vehicle's wake-up process.