In Pixar’s Cars 2, Mater uses the name Tow Mater while competing in the World Grand Prix.
Tow Mater is his full character name, built around his role as Radiator Springs’ tow truck. In the sequel, Lightning McQueen brings Mater along to the international event, where Mater’s unusual behavior causes others to mistake him for a secret agent. His identity is not changed into a conventional spy name; the comedy comes from treating the familiar tow truck as if he were a trained operative.
The name also reflects a wordplay common in the Cars films. “Tow mater” sounds like “tomato,” while the character’s speech and country style make the phrase part of his memorable introduction. Mater’s official name is often shortened to simply “Mater” in dialogue and promotional material.
Larry the Cable Guy provides Mater’s voice in the Cars films. Cars 2 expands the character from comic sidekick into the story’s accidental central investigator.