2015 BMW X3: What is the tire size and pressure, and wheel size?

The tire pressure for the 2015 BMW X3 iS32 psi while the tire size is 245/50r18 and the wheel size is 18 inches. If You need to reset the tpms on the car after buying new tires then it will not be that hard. First, make sure that the vehicle is on level flat ground. Check the tire pressure for each of the tires, and make sure they are within the correct psi. If You look on the side of the tire it should have the psiAmount stamped on. Once this is done You will want to get in the car and turn on the power but do not start the engine. To the right of the steering wheel is a button that will be labeled tpms or something close. Hit this and hold it down until it begins to blink. Once it blinks leave the car sit for about 20 min, as it will take this long for it to recalibrate. When it stops blinking You can shut the car off and then turn it back on to make sure the reset worked.