One thing about minivans - they're hell on tires. Not sure why, but the local tire place & other guys I've talked to agreed. Just replaced the Sienna's tires, & they told me they keep their tires inflated to 40 psi (not the 35 stated in the owners manual) because they found that the tires lasted a lot longer at that pressure.
FYI - thought I'd pass this along.
FYI - thought I'd pass this along.