Most people and myself use silicon spray. Use a lot of it on the areas where the black seat belt housing meets the interior paneling. That seemed to quiet it down about 80%. Others took their car into the dealer to have them take off the housing and put padding under it. I tried this myself, but couldn't get the housing off completely so I'm not sure how well that works. Plastic on plastic contract is a major no no in the automotive world, so why they did that here I don't know.