Dear Condoboy--  The problem you are having with your 2000 Chrysler 300M is not Chrysler's  fault.  I urge you to bring your car to one of the reputable tire dealers in your area.  You may need new tires, but it sounds like you might just need proper installation of the current tire to the rim.   Good luck from Bovan.

I have had problems with one of my tires continuing to go flat.  I have replaced the tire twice and also the valve stems.  We recently discovered what the real problem was the wheel itself.  There was pitting and corrosion on the inside of the wheel that kept building up which kept the tire from sealing properly.  Have someone check out the wheel.  Good luck!

The wheels on this car are notorious for pitting and causing tires to lose air. Have a tire shop grind down the wheel at the bead so that it seals properly. This has cost me several sets of tires!