Rear Brake Vibration

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.

Have you checked the front brakes? 2009 was three years ago. Besides, you could easily have developed a sitcky caliper slide since then.

Could be a caliper issue. Are you sure the vibration is from brakes and not wheels? It might be the wheel bearing too.