Jaguar Land Rover has confirmed it is asking its 2,500 workers at its Castle Bromwich factory to go on a four-day week to help safeguard the future of the plant.
The staff will also be asked to agree to changes in other working practices in a ballot later this week.
ITV News Central has been told that the factory needs to become more flexible and more efficient if it's to stand a chance to get more investment in the future.
Production of the XJ model which is built at the factory comes to an on July 5th.
The XJ brand will continue to exist but it's not been decided yet where any new XJ models will be built.