04 MDX when braking while going over bumps the brake pedal has a vibration not like warped rotors and a sound under the hood more like how it feels when a car pads are grinding on rotors when there is no pad left or ABS starting but rotors and pads are new and this problem was before the change normal driving its fine but braking over bumps it has this funny feeling but not all the time and seems like when the drivers front wheel hit the bump it starts or both wheels no real idea but can it be a bad wheel speed sensors and the ABS is activating also no dash lights

 

check the suspension on that corner. Sway bar links, bushing, axle, etc. Something in there is moving around when it shouldn't.

 

heard it again the noise is not something rattling its a sound of electrical something running like a pump or something for about 3 to 4 seconds after the bump with my foot on the pedal

 

if there is a brake caliper that is stuck or not moving properly, the ABS pump can sometime kick in to provide extra braking force automatically, I think it's electronic brake distribution or something like that. I'd check all the calipers and flush the brake fluid, make sure you bleed them too!