I have a dilemma: my right front caliper froze and I barely made it home yesterday. Now, shall I rebuild the calipers or buy remanufactured ones? I am generally concerned about the quality of remanufactured parts, such as Nugeon, Cardone, Centrix - they all seem to be using cheapest components possible... and of course the cheapest labor there is.

On the other hand I can't seem to find replacement pistons (only gaskets) - from either ATE or BMW. What is the probability of opening up the caliper only to find piston that has scoring or rust? What was the condition of the pistons for folks who disassembled theirs? Mine is not leaking... but it is stuck. I and I didn't do a good job replacing braking fluid in the last X years.