This is purely an engineering screw up. The tubs were installed on both the passenger and driver side of car between the front and rear wheels. as you drive the open ends on theses accumulate dirt, rocks and etc. This is trapped in the tub and causes loud noises that the dealer cannot or will not fix. Resulting in the owner having an ongoing expense to remove the tubs and get the rocks and dirt out.

I am sure this is a known issue at the dealers, but they continually act dumb when you report it. Calls to the manufacture only get you referred to the local dealer, what a waste of time...