In Pixar's Cars, Luigi is a Fiat 500 who owns Luigi's Casa Della Tires.
Luigi is one of Radiator Springs' most enthusiastic residents and operates the town's tire shop. His character design is based on the classic Fiat 500, a compact Italian car famous for its friendly shape and strong connection with postwar Italian motoring. Luigi's Italian identity is reinforced by his accent, his shop's name, and his admiration for Ferrari.
The character is paired with Guido, a small forklift who works at the tire shop and serves as Luigi's assistant. Their scenes emphasize Luigi's passion for racing and tire-changing, especially when Ferrari race cars visit Radiator Springs.
This fact is sometimes confused with Guido's vehicle type. Guido is a forklift, while Luigi is the Fiat 500 who owns the business. The answer is commonly written as Fiat 500 or Fiat Cinquecento.