What about The Car (1977)? Footage of the possessed Continental driving itself off the cliff was seen in two episodes of Knight Rider's 1st season: "Trust Doesn't Rust", where KARR drives off the cliff to his doom, and "Forget Me Not", where KITT drives off a cliff to land safely on the ground.

And who could forget the episode of The Incredible Hulk, "Never Give a Trucker an Even Break", where a lot of stock footage from Duel (1971) is seen. Spielberg, who directed Duel, was angered by this, and made arrangements so none of his footage would be reused like that ever again.