I have had recurrent problems with the rims on my van. One tire kept losing air and when the tire place pulled it off the rim they found the tire full of aluminum looking powder! They suggested I buy another rim. I bought a used rim and about 6 months later I am having the same issue. A different tire person told me that "Chrysler has had some problems with their tires". Is this true and what can I do about it? I have had the tire "sealed" twice now and still find it leaking air at the most in opportune times! Thank you for any assistance you can offer. I love my van but must have a reliable transport!