In order to assure optimum performance to your vehicle, check all of your tires once a month or whenever they look low. Remember that low tire pressure can lower your gas mileage, make your car handle poorly and even lead to blowouts. Follow these few helpfull steps to keep you safe on the road with properly aired tires!

Of course you do not need to perform this operation if you have installed Tire Pressure Led on your tires.

Tools you need to perform this operation: Tire-pressure Gauge, Air Compressor

1. You can't tell whether a tire has the correct air pressure just by looking at it. Always use a tire-pressure gauge. You can buy a good-quality tire-pressure gauge at your local auto-parts store. If you don't have one, the pressurized-air machines at many gas stations and garages have gauges, although they might not always be accurate or functioning.
2. Find the air-pressure specifications for your car's tires. You'll usually find them on a sticker located on the driver's side doorjamb. Or the sticker may be in the glove box or trunk. Don't look at the tire's sidewall for the air-pressure specifications, as it lists the maximum pressure for the tire.
3. Unscrew the plastic cap on the air valve. Put it in your pocket so you don't lose it.
4. Press the tire-pressure gauge against the valve and hold it down firmly (see illustration). If you hear a hissing noise, you are letting air out. Press down harder.
5. Read the measurement on the gauge.
6. Add air as needed, but don't overfill the tire.