Brakes squealed within days of purchasing new sienna 8-seat mini-van. it was returned to be fixed to dealer who "glazed" the brakes. within days they were squealing agin. it was again returned to dealer who replaced rear drums and shoes. within a few days the brakes were squealing again. it was taken to a second dealer who again replaced rear drums and shoe but within 24 hours, the brakes were again squealing. it has less than 4000 miles and has had less than a week when the brakes have not been squealing. additionally, it takes excessive force to close back hatch.