More than 1,000 Ford employees will go on strike on Wednesday, the Unite union has said.
Administrative workers in Dunton, Stratford, Dagenham, Daventry and Halewood will walk out for 24 hours over a long-running dispute about pay and contract changes.
The carmaker has offered many office workers a one-off payment for 2024, rather than giving them a permanent pay rise.
Performance-related pay will be imposed from next year for all staff.
Money blog: Dental product bought by millions is waste of money, top dentist says
Despite absence being less than 2% changes to sick pay policy and the Unite collective bargaining agreement are also being sought, the union said.
A 24 hour walkout will be staged on 30 October after industrial action short of strikes began on 22 August.
Workers other than admin staff as managers have also engaged in industrial action since June after the union said they were offered a performance related pay award only, which all staff weren’t guaranteed to receive.
Unite said “sensible counter proposals” to end the disputes were put forward but Ford is “refusing to engage in good faith”.
Significant disruption will be caused by the strikes, Unite added.
Ford has been contacted for comment.