Dragging brakes - 2016 impreza

[tectweaker]

I have a strange issue on my Impreza that I have not been able to figure out.

One of my brakes keep sticking - first it was front right - I changed the caliper, pads and line. Then it was rear right. Did the same drill and looks like it is back on front right again. Also had the brake fluid bled.

The pressure on the pedal feels fine.

Where should I look next - could the master cylinder or brake booster acting up or is it something else that I might have missed.

 

[Ecmbuster]

Test / replace the hose from the line to the caliper. Interior damage can have the hose behave like a "check valve".
A defective ABS hydraulic unit will also behave in a similar fashion (built in ABS check valves).
Testing will require a Subaru Scan tool.