I am noticing an audible vibration coming from the rear of my wife’s 2004 Sienna van when applying the brakes. I have inspected and confirmed there are no fluid leaks,there is ample material left on all pads and the pads still fit snugly into the retention clips. Also, the pads and rotors show no sign of uneven wear. Front brakes were replaced in 2009.The van currently has ~63000 miles on it.
All suggestions are appreciated.