Great question! Instead of having to check your tire pressure manually, your 2020 Mazda CX-5 will actually let you know when your tire pressure is too low with its Tire Pressure Monitoring System (TPMS). Your TPMS monitors the pressure in each tire via tire pressure sensors and will alert you through a warning light on your instrument cluster and a warning beep sound.
So these days, you don’t necessarily need to directly measure your tire pressure on a 2020 Mazda CX-5! But if you actually need to check the tire pressure yourself, you can do so by removing your tire’s valve stem cap and using a tire pressure gauge on the valve stem.