Cobra Kai used The Karate Kid's original yellow 1947 Ford Super Deluxe convertible in Season 2

Indiewire

It was Ralph Macchio's idea to include the car made famous by his wax on, wax off scene from the 1984 film. It helps that Macchio took ownership of the car after filming the third Karate Kid movie. “I said if we’re doing the show, I want the car to be in it," said Macchio. "We got to dust it off — it’s been still for about two decades — and then put a new engine in it and get it all cleaned up and looking like new. I love having it in there.”