Jaguar Land Rover is due to give a business update on Thursday that is predicted to include the loss of up to 5,000 jobs.
The luxury carmaker employs 44,000 workers in the UK at sites in Halewood on Merseyside and Solihull, Castle Bromwich and Wolverhampton in the West Midlands.
There were reports in 2018 that thousands of jobs could be axed as part of a £2.5bn savings plan amid falling sales in China, Brexit and a drop in demand for diesel cars, but that figure was not confirmed.
The company, owned by Indian conglomerate Tata, cut 1,000 temporary contract workers last year at its plant in Solihull.
The announcement is expected to include details of sales for 2018, the business outlook for this year, an update on cost savings and planned investment in UK plants.
