I think lucky Ryan, it doesn't always happen but when it does you have to replace the ABS unit. All it takes is a super tiny speck of dirt in the system to get lodged into an orifice. For me, since I do brake work almost daily I just can't afford to take the risk. Newer systems won't have the contamination build up so thats good and if you change your brake fluid every 3-5 years then that helps a bunch too but I always open the bleeder just to be safe.Matt, I've heard the advice to open the bleeder when compressing the piston before - and it sounds like a good idea.
But I've never done it, and never had a problem with the ABS. Have I just been lucky?
uggThe reason I ask is I don't want to replace all my calipers when it's time for new pads... remember this? I still haven't touched any of the other brake bleeders because I know what's going to happen.
Ryan

You are due for a fluid change anyway IMO. If I were you I would open and or break each of the others to see how many calipers I needed before doing the work, so have fun... go out there and crank on them till they break or open!!
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