The correct air pressure for a vehicle's tires is generally found in the vehicle's owner's manual or on the tire placard located inside the vehicle's door, glove compartment door or fuel door, according to Discount Tire. The tire placard also lists the recommended tire size for the vehicle.
Maintaining correct air pressure in a vehicle's tires is important to ensure that tires last longer and the vehicle handles properly, states Discount Tire. Keeping tires properly inflated can also enhance fuel economy and prevent accidents. It's best to check the air pressure in a vehicle's tires every other time it is filled with fuel and with each tire rotation.