Christine (1983), directed by John Carpenter and based on Stephen King’s bestselling novel, tells the story of a shy teenager whose life changes when he buys a 1958 Plymouth Fury possessed by a murderous spirit. As the car’s supernatural influence grows, the boy becomes increasingly corrupted, and anyone who threatens their bond faces brutal retribution. Mixing possession horror, supernatural revenge, and King’s signature small-town dread, Christine has become a cult favorite in both horror and 1980s cinema.

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She was born bad. Plain and simple.
Somewhere deep on a darkened assembly line.
Christine. A ’58 Plymouth Fury possessed by Hell.
She’s taken control of her teenage owner, Arnie.
Her previous owner is not alive to warn him.
And now she’s steering straight for
the one person in her way.
Arnie’s girlfriend, Leigh.
The other woman.

Från IMDB:
A nerdish boy buys a strange car with an evil mind of its own and his nature starts to change to reflect it.