Thousands of workers could be set to strike at Jaguar Land Rover.
Workers employed by DHL voted overwhelmingly for strikes at two Midlands sites.
They bring parts to the production line.
They are members of the Unite union.
Another ballot result is due from DHL workers in Halewood, Merseyside, and four more from two other contractors.
Workers demand pay rises to match workers employed by Jaguar.
Jaguar’s profits have soared thanks to huge demand for its luxury cars.