<human>:  How do I check the air pressure in my car tires?
<bot>: To check the air pressure in your car tires, you will need to use an air pressure gauge. You can purchase one at most automotive stores or online. Place the gauge onto the valve stem of the tire and press the gauge firmly to get an accurate reading. The recommended tire pressure for most passenger cars is usually printed on a label inside the driver's side door or in the vehicle manual.