Lightning McQueen, now a seven-time Piston Cup racing legend, and the other veterans of the Piston Cup, suddenly find themselves being displaced by the next-generation rookies such as Jackson Storm, outfitted with the latest technology to break speed records. As the season progresses, the amount of new racers begin to increase, resulting in many veterans either to retire or be fired by their sponsors, to make way for the new generation. Then, on the last race of the season, McQueen gets into a near-fatal rollover crash while trying to catch up to Storm, leaving him badly injured.
As Cruz celebrates her victory, Sterling offers her a role on his team, but she instead takes a counteroffer made by Tex Dinoco. Sterling reminds McQueen about his bet, but McQueen points out that his name is shared with Cruz's on the leaderboard as victors since both him and Cruz raced with the winning number and thus winning the deal. Tex then goes to speak with Sterling, offering a deal. Sometime later McQueen and Cruz have returned to Radiator Springs decked out in Doc's old color and number, respectively. They learn that Tex has bought the Rust-eze team from Sterling, and McQueen decides to continue racing and train Cruz as well.
In the post-credits scene, Mater at his junkyard tries to answer an incoming call from his phone. Somehow he accidentally touches his reception antenna and his phone goes dead much to his dismay.