The number painted on Lightning McQueen's racing car throughout Pixar's Cars films is 95.
McQueen is a red race car whose identity is closely associated with the large yellow 95 on his sides and roof. The number remains part of his design as his sponsors, paint scheme, and racing equipment change across the trilogy. In Cars 3, Cruz Ramirez also drives the number 95 car during the Florida 500 after McQueen gives her the chance to race.
Pixar has connected the number to the studio's history: Toy Story, Pixar's first feature film, was released in 1995. The number also appears in Pixar-related references and merchandise, making it one of the franchise's most recognizable visual details.
McQueen's 95 should not be confused with Doc Hudson's number 51, The King's number 43, or Chick Hicks's number 86. Those numbers belong to other racers. McQueen's number is a stable identifier across the Cars films, even when his vehicle design evolves.