Stellantis, the parent of Chrysler, Jeep and Ram, and the United Automobile Workers union said they had reached a deal on a new contract similar to the one that the union reached with Ford.
Car manufacturers must now raise labor costs as they confront slower-than-expected demand for electric vehicles.
Mr. Ford, the executive chairman of Ford Motor, said nonunion automakers would make gains against Michigan automakers because of strikes by the United Automobile Workers union.
The United Automobile Workers union refrained from expanding the strikes at Ford, General Motors and Stellantis but said it could do so at any time.
The company said it had reached the limit of what it could offer to the United Automobile Workers union, which has expanded its strike to Ford’s largest plant.
The United Automobile Workers said on Friday it had secured an important concession from General Motors regarding the contracts of workers at battery factories.
As electric vehicles usher in a new era for the car economy and workers strike against rooted manufacturers, Neal E. Boudette is in Motor City to cover it all.
Their responses obscure the nature of the conflict.
Elon Musk, the Tesla chief executive, may be able to exploit his rivals’ weaknesses, but the United Auto Workers union also has the electric carmaker in its sights.
Autoworkers want, and deserve, a big raise. But they are asking for too much.