Mater is one of the main characters of the Disney/Pixar Cars franchise. He is Lightning McQueen's best friend.
In the films, Mater isthe tetartagonist of Cars, the main protagonist of Cars 2, and a supporting character in Cars 3. In the shows, he is the titular protagonist of Cars Toons: Mater’s Tall Tales and one of the main characters of Cars Toons: Tales of Radiator Springs.
He is voiced by famous comedian Larry the Cable Guy.
He is a rusty old tow truck (Boom Truck). When he wasn't rusty, he was cyan-colored as an 8-year-old youngster.
Mater is a hilarious, fantastically friendly, good-natured, loyal tow truck who happens to be best friends with Lightning McQueen.
No, uh… no, I know your name. Is your name Mater too?
~ Mater when he meets Lightning McQueen
When I say go, we go. But don't let Frank catch yeh. Go!
~ Mater as he takes Lightning McQueen tractor tipping
Tractors is so dumb.
~ Mater when Frank the angry combine harvester appears
Look at this! It's my hood! It's my hood! I haven't seen this thing in over 20 years! Well, it fits perfectly! How do I look? (sneezes; the hood falls back down the cliff) Aww, dang!
~ Mater when he fishes his old hood out of a ravine with his tow hook, only for it to fall right back down
A113, a joke found in other Pixar films, is Mater's license plate.
It is highly speculated by fans and heavily implied by the film franchise that Tow Mater has high functioning autism or is somewhere on the spectrum (because of his vast encyclopedic savant-like knowledge, he likes to self stimulate when he feels overwhelmed and he has sensory processing disorder problems. He is also quite obsessive with things that interest him and he's a very visual thinker) He also takes idioms and sarcasm too literally and he's a poor socializer (he's socially inept).