ITV News has learned that Jaguar Land Rover will not be renewing the temporary contracts of 1,000 agency staff at Solihull.
The firm is cutting car production because they are selling fewer diesels. They're also blaming a general decline in car sales after Brexit.
The company say they're responding to the "continuing headwinds impacting the car industry."
It will announce its plans for 2018/19 to its workforce on Monday.
New car sales fell by 5.7% in the UK last year amid falling business and consumer confidence.