Jaguar Land Rover says it only has enough parts in its UK factories to last the next two weeks because of the impact of the coronavirus on the carmaker's supply chain.
The firm's chief executive Sir Ralf Speth reportedly said parts have been flown into the country from China in suitcases.
In Coventry to launch a self-driving electric vehicle dubbed Project Vector, he said JLR's factory in China would re-open next week.
But he admitted uncertainty over whether the company would have enough parts to maintain production in the UK.
"At the moment, we are safe and we have checked everything for the next two weeks and we are also safe for the very first week in the production in China, starting next week," he told Sky News at the National Automotive Innovation Centre.
"We don't know how long it will take until the supply chain in China comes on stream again."