In Pixar's Cars, Luigi owns the Radiator Springs tire shop.
Luigi runs Casa Della Tires, the town's tire business, and is an enthusiastic admirer of Ferrari racing cars. He is a small yellow Fiat 500 whose passion for Italian automobiles provides one of the film's recurring jokes. His assistant and friend Guido helps with tire changes and pit-stop work, but Luigi is the shop owner.
The business name, Casa Della Tires, means “House of Tires” in Italian-style wording and reflects Luigi's proud connection to Italian car culture. The shop also becomes the setting for the film's memorable Ferrari visit, when Michael Schumacher arrives with a group of Ferraris and Luigi is overwhelmed with excitement.
A common mix-up is answering Guido because Guido performs many of the tire-changing actions. Guido is Luigi's blue forklift assistant and speaks mostly through expressive sounds. Fillmore owns the organic fuel station, while Ramone operates the body-art and paint shop, so neither owns the tire business.