Cruz Ramirez wins the Florida 500 after taking over as racer in Pixar's Cars 3.
McQueen begins the film struggling against a younger generation led by Jackson Storm. After a training accident and a change in strategy, he helps Cruz discover that she has the ability and desire to compete herself. During the Florida 500, Cruz replaces McQueen and races Storm.
Cruz's victory gives the film its central generational handoff. McQueen does not simply disappear from racing; instead, he becomes a mentor and continues to support Cruz. The ending connects his past as a champion with a new role inspired partly by Doc Hudson.
The Florida 500 is fictional and is presented as a major Piston Cup race. Cruz's win is distinct from McQueen's earlier Piston Cup successes and from Storm's status as the film's dominant modern rival.