general problems of the 2014 Toyota Sienna

The van seems to prematurely wear tires out before their service life expectancy. I've owned the van for seven years, and I've had to purchase over five complete sets of tires. The front tires wear-out much faster than the rear tires, and do not last more than 15k miles. I've had several alignment jobs done, both (l&r) control arms replaced, ball joints, and struts - the van still wears out tires regardless of tire brand. I suspect the must be a design flaw causing premature wear and tear on tires on the front of the van, as I just replaced another set of tires from the yokohama brand recommended for the van. I've asked Toyota, and they claim ignorance of such a problem. It is my desire to make this problem known, and to have the government investigate if there is an design flaw in the Sienna van which is causing rapid part failures.

The rear electro magnetic coupler had to be replaced at 120000 miles. Online multiple complaints are listed for the same issue and Toyota has a recall issues for the same component for the rav4. So why not for the Toyota Sienna xle ltd awd thanks.

Car clunks from rear, when going over bumps, or backing up out of driveway. Seatbelts are secure, jack and spare tire are secure. Dealership could not find anything wrong, continues to make noises daily.

Vehicle eating tires, in four years I went thru 4 sets of tire, I did 4 time alignment and at least 10 time balance and rotation.

Excessive outer wear on front tires, since may 2015 I put three set of tires all front wear out very quick. Local dealer have all record and also I have receipt for all.