The recommended tire pressure for the stock 18 wheels on a 2015 BMW X5 iS35 psi in the rear and 32 psi in the front. The tires that come on an X5 from the factory are size 255/55R18. It is more important than most people realize to keep Your tires properly inflated. There are several negative side effects to driving with improperly inflated tires, some of the more serious ones are uneven wear on the tire tread, which can lead to poor traction, as well as lowering Your fuel economy. It can also weaken the sidewalks of the tire which can lead to a blowout. Most people believe that the pressure listed on the side of the tire is what You are supposed to fill them up too but this number is actually the max psi that it should ever be inflated too. The recommended psi is the number stated by the sticker located in the glove box or the driver door jam.
Rick Campodonico
November 14, 2022
Answers above are incorrect. Refer to the manual. It depends on the size and speed rating of the tires. 18” 109H are 33 front and 41 rear, for example.
Mara D.
January 2, 2020
The base model wheel size for the 2015 BMW X5 is 18-inch. The tire size for the 2015 BMW X5 is 255/55R18. The recommended tire pressure for the 2015 BMW X5 front is 32 psi and the rear are 35 psi.
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