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**portlandgrey** · 25-06-2016, 03:07 PM

Changing the rear pads yesterday & my N/S caliper has a torn seal & corroded piston.
I managed to get it cleaned up enough for the caliper to work ok for now, but will look to sort it out next week.

Does anyone know the part number or a source for replacement pistons/seals?

I've checked real oem & it dose'nt show the piston part no.
Is it shared with any other BMW?, i've read it may be the same part as fitted to the e93 M3, but can anyone confirm the actual part number needed?

25-06-2016, 03:07 PM	#1
portlandgrey S4 - Getting the hang of it Join Date: Jan 2010 Posts: 153 Casino cash: $8449	rear caliper piston replacement Changing the rear pads yesterday & my N/S caliper has a torn seal & corroded piston. I managed to get it cleaned up enough for the caliper to work ok for now, but will look to sort it out next week. Does anyone know the part number or a source for replacement pistons/seals? I've checked real oem & it dose'nt show the piston part no. Is it shared with any other BMW?, i've read it may be the same part as fitted to the e93 M3, but can anyone confirm the actual part number needed?