Can you fix a seized brake caliper?
Seized caliper pistons can be removed with the hydraulic pressure off the brake system itself. After removing the caliper from the disc, pump the brake pedal to move the piston past the corroded section. You will then be able to disassemble and rebuild it. via
How do you install a brake caliper? (video)
https://www.youtube.com/watch?v=nbdJGCi29nQ
How much does it cost to replace one caliper?
A brake caliper replacement cost could come to anywhere between $250 and $600 per affected wheel, including labor and depending on the vehicle. via
What causes brake calipers to stick?
The most common cause of a sticking brake caliper is a rusty caliper piston caused by a damaged piston boot. It can also be caused by stuck brake pads pushing on the brake discs. If it's a rear brake caliper, it could be a faulty parking brake cable. via
Can you lubricate brake caliper piston? (video)
https://www.youtube.com/watch?v=rN1fjsEcs-o
How do you release brake caliper pressure? (video)
https://www.youtube.com/watch?v=3RYG0ymWEFE