My front air suspension started making noise around 80000 miles and is getting worse. I was going to have top bearing supports replaced, but the dealer does not offer parts to repair the air shock, if it was a standard spring shock the bearing can be replaced. You need to replace complete air assembly on each side at a cost of one thousand each just for the part. Lexus does not offer this suspension anymore because of issues. I might have to change over to standard shocks and coil springs. What a pain!