Mater

Mater is a side character on PCP's channels, featuring as a side in many projects, such as the Racing Like a Fireball trilogy. He is well known for his different ways of killing Guido.

Overview:
Mater is a kind, but clumsy car. He wants to do the right thing, but messes up quite frequently. He has been known to kill Guido from time to time, which frustrates Luigi. He accompanies Lightning McQueen to his races and tries to find him when McQueen goes in search for Sally after Rich Mixon captures her. He sings the songs Silent Track and Mater's Carol in Racing Like a Hero. Mater was actually the police officer that arrested and guarded Lightning, after he had called the children he looked after cute, in the episode Babysitting. He would also be the officer to arrest Forky in Forky Goes to Jail.

Trivia:

 * PCP provides Mater's speaking and singing voices.
 * He was a judge on Cruz's Kitchen
 * He tends to lose the receipts to products he buys, especially gifts
 * Mater's background role presumably comes as punishment for the abomination that is Cars 2, where he was the star. (I'll make a fool outta him in the sequel that is like two hours long...)
 * He once (uncanonically) had his own YouTube channel, called Mater Vlogs.
 * He like Jumex Man can sense when something isn't right.