Although Shanghai's 23,000 infections on Friday were down from more than 27,000 the previous day, they included a record 3,200 symptomatic cases, versus 2,573 a day earlier.
Xpeng's Chief Executive He Xiaopeng issued a dire warning for the sector unless the situation improved.
"If the suppliers in Shanghai and its surrounding areas can't find a way to resume operations and production, in May possibly all of China's carmakers will have to stop production," he said on the Wechat social media app.
Richard Yu, chief executive of both Huawei's consumer business group and its smart car unit, mirrored He's sentiments in private comments confirmed by the company, adding that the industry faced huge losses.