Fleet vehicles are groups of automobiles with a single owner, typically a company or corporation, rather than an individual or family. Typical examples are the vehicles owned by a car rental company, the vehicles owned by a utility company, and the vehicles owned by a security or police department.

Fleet vehicles typically lead hard lives. These vehicles are often operated by several drivers, subjecting them to accelerated wear. Further complicating the matter is the fact that, since the drivers are generally not held responsible for the condition of the vehicle, they do not exercise the same care for fleet vehicles as they might for their own vehicles. Fleet vehicles may also be subjected to unusual conditions (i.e. all-local driving, 24-hour use, or excessive cargo weight), and may be kept until they have accumulated hundreds of thousands of miles. All of these factors combine to produce a lot of wear and tear on these vehicles.