When we picked up our Reflection, I checked the tire pressure in each tire. One tire was 40 pounds and the other three had 75 pounds. I just had them air that tire up and went on my way. Since then I have found that tire will lose almost a pound a day. I am sure it is the valve, valve stem or the rim itself. I should of had the dealer find the leak as I believe it may be the rim as others have had this slow leak problem. It will be warranty issue if it is the rim. However, the point is if I had not checked the air in these "new" Westlake tires and continue to check the pressure I could/would have a blowout and blame these no good Westlake tire. Yes, I do have TPMS, but I did not have TPMS when I left the dealer.