Proper tire pressure is the most important part of maintaining your tires. It affects safety, their durability, and your fuel consumption.
Check the pressure of all tires, including your spare, at least once a month when the tires are "cold," meaning that the car hasn't be driven for at least three hours.
Your tires' proper tire inflation pressure—measured in both kilopascals (kPA) and pounds per square inch (PSI or psi)—can be found on the Tire and Loading Information Label on the driver's side door edge or in your owner's manual.
Keep a tire pressure gauge in your vehicle. A tire can suddenly lose pressure if you drive over a pothole or bump into a curb when you park.
