[wrk.eat.drive.rpt]

Hi folks, been trying to solve this for awhile .

I have a harsh vibration(no squeaking) sensation when doing medium to hard deceleration on my Z4m ONLY from 50 mph to 15mph. (Above and below it sounds normal)The problem definitely worsens the heat you put on the brakes. I seem to sense it for front and back , and the brakes smell smoky/hot after only medium levels of braking. (All of this street driving not track) below are things I've tried to address it.

1. Change front rotors to oem
2. Change front pads to new oem
3. Change fluid
4. Change to hawk pads (properly bed)
5. Adjust hand brake in case it was just touching when rotors got hot.

Nothing seems to be working... could I need rebuilt calipers or bearings ? But it seems like it's not drawing any of those symptoms (front and back/relatively even brake distribution etc)

Any help would be extremely helpful , been trying to address this for the past 5-6 months . Thank you ahead!!!