My proton gen2's rear tyre brake clipper is leaking.must i change the whole thing?

i find my gen 2 car sometimes screeches when i brake while reversing in the morning. the car workshop found the rear tyre clipper is leaking. there's oil around it and on the brake pad. is it a must to replace the whole clipper? they said for this car model it's not possible to just replace the rubber. and how much does a clipper cost? is it dangerous if i ignore it?My proton gen2's rear tyre brake clipper is leaking.must i change the whole thing?normally just a seal replacemont kit is needed...aLOT cheeper then a new caliper...you WILL want it done sharpish.My proton gen2's rear tyre brake clipper is leaking.must i change the whole thing?unless you have access to a rebuild kit,yes you will have to replace it then bleed the system.