Hi;
Someone know how i can fix a stuck caliper, my car have the rear right caliper stuck.

Thanks in advance...

 

Your going to have to just replace the caliper. Even the new ones are rebuilt.
I changed all 4 front and rear, only 2 were stuck(driver side F&R) but my mechanic recommended to do both sides to keep everything even. I changed the calipers, rotors(brembo) and pads(oem) cost me $500 for the parts. I did most of the labor myself with my mechanic friend helping at his shop. Wasn't hard but having a lift and proper tools makes it easier.