Caliper piston leaking brake fluid

AdnanH35 · 06-20-2021, 06:32 PM

I changed the brake pads and rotors on my 2016 x3 today and accidentally broke the seal on the caliper piston. Anyone encounter this issue? Do I need to replace caliper or is there another alternative?

pungo · 06-20-2021, 08:06 PM

Not sure how you broke the piston seal that it's leaking fluid.

Did you take the piston out, cause I'm not sure of any other way you could tear the seal?
Anyway, if the piston and caliper cylinder wall are in perfect condition, they sell rebuild kits with new seals. Though since you're asking how to fix it, you might be better off replacing the calipers because brakes are one of the most important safety features on the vehicle, so failure is not an option.

Wgosma · 06-20-2021, 10:22 PM

New or refurbished caliper might be sensible way to go- more costly, but pretty much a goof-proof solution on key component.

n55david · 06-21-2021, 10:59 PM

you need a caliper really.. its rebuidlable but the money and time is better spent on a caliper

06-20-2021, 06:32 PM	#1
AdnanH35 Second Lieutenant 435 Rep 219 Posts Drives: 2017 M3 Join Date: Apr 2018 Location: Connecticut iTrader: (0) Garage List 2023 BMW M2 [9.38]	I changed the brake pads and rotors on my 2016 x3 today and accidentally broke the seal on the caliper piston. Anyone encounter this issue? Do I need to replace caliper or is there another alternative? Attached Images
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06-20-2021, 08:06 PM	#2
pungo Colonel 885 Rep 2,551 Posts Drives: Z4MC-X3-35i-525i, Corrado G60 Join Date: Nov 2007 Location: MD iTrader: (5) Garage List 2011 BMW X3 x35i [0.00] 2001 BMW 525i [0.00] 2007 BMW Z4 M Coupe [8.76]	Not sure how you broke the piston seal that it's leaking fluid. Did you take the piston out, cause I'm not sure of any other way you could tear the seal? Anyway, if the piston and caliper cylinder wall are in perfect condition, they sell rebuild kits with new seals. Though since you're asking how to fix it, you might be better off replacing the calipers because brakes are one of the most important safety features on the vehicle, so failure is not an option.
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06-20-2021, 10:22 PM	#3
Wgosma Lieutenant Colonel 808 Rep 1,910 Posts Drives: 2012 F25 X3 28i (N52) Join Date: Sep 2018 Location: Northern Nevada iTrader: (0)	New or refurbished caliper might be sensible way to go- more costly, but pretty much a goof-proof solution on key component.
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06-21-2021, 10:59 PM	#4
n55david Check out my Youtube @n55david! 1297 Rep 3,536 Posts Drives: 2017 m240i, 2015 X3 x35i Join Date: Aug 2018 Location: Michigan USA iTrader: (0) Garage List 2017 m240i xDrive [0.00] 2015 X3 x35i [0.00] 2015 335i xdrive [0.00]	you need a caliper really.. its rebuidlable but the money and time is better spent on a caliper __________________ 2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots 2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc
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