Dear users
I have the following issue:
My front right (driver’s side) disc brake is dragging. I restored the caliper and replaced both, pistons, piston seals and the brake hose. The slides are well lubricated and travel freely. There’s no issue with my wheel bearing.
It’s still dragging and heating my brake disc to 75C degrees (and possibly over if I didn’t stop to cool it down).
My understanding is that it’s not the brake booster or the master cylinder as the issue would occur on both sides symmetrically.
How to diagnose what else could cause the issue and how to test it?
Subaru Forester 2007 Xen Auto, front brake discs and rear drums
Your help is appreciated