| the orings are replaceable just not from nissan directly, if you searched you would of found my post from over a year ago... you need to buy PTFE orings 011 for front and 013 for the rear  [ http://www.sisweb.com/vacuum/o-rings/ptfe_0.htm ] i dont remember how many you need for each caliper either one or two but just buy 5-6 of both sizes to have extra p.s. this belongs in tech 
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