K-Rust is the radio station heard in Pixar’s Cars.
K-Rust is a fictional station in the film’s automotive world. Its name appears as part of the movie’s layered background design, where brands, broadcasts, road signs, and advertisements help make the vehicle-populated setting feel like a functioning society. The station is associated with the wider Rust-eze branding that surrounds Lightning McQueen’s early racing career.
Cars includes many fictional commercial names and media references modeled on real-world car culture. These details help separate the film from a simple human-free version of a normal town: the characters consume entertainment, follow racing coverage, and recognize sponsors and public figures within their own world.
K-Rust is easy to confuse with the film’s better-known places and brands, including Radiator Springs, Dinoco, and Rust-eze. It is not the name of a town, race, or sponsor. The question asks specifically for the radio station name, which appears among the film’s background media details rather than as a major plot location.