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Discussion Starter · #1 ·
Own a 2015 forester with 150 km. Replaced rear brake rotors/pads at 90k. At 120km rear caliper seized and resulted in having to replace rear rotors/pads and calipers. Now at 150km one of the year old calipers seized when on a long road trip so now replacing rear rotors/pads and calipers. Never had to do any work on front. Any ideas what might cause this besides faulty calipers?
 

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2001 Forester S, 4EAT
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Really depends on brand/quality of the calpers, road/salt conditions, condition of brake fluid. I have some calipers I bought from AutoZone the rust almost in a couple of months and I live in Dallas, TX. Ended up buying better quality calipers from Rock Auto.

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Discussion Starter · #3 ·
They were Subaru calipers. We do have lots of snow and salt. Might be a good idea to swap out brake fluid and brake lines?
 
2017 2.5i Fozy CVT
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And clean and sil-glyde silicone brake grease the slide pins

Buy replacement bushings for the slide pins beforehand
 

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I've seen it once on an Acura where the rubber line seemed to act like a check valve; the fluid would go towards the caliper but not return properly so it would act like it had a seized caliper. Replaced the rubber lines and it was fine.
Not sure whether this failure is very common but I have heard it happened to others as well.

Open the bleeder valve and see whether that releases the caliper. Since you want to replace the caliper anyway, it is worth a shot.

Edit: It has been a while ago doing that^ repair so asked google and came up with this video that describes the condition.
 

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2001 Forester S, 4EAT
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Some have mentioned the slide pins need greasing and that is a great suggestion. As the issue may not be caused by stuck pistons but just the slide pins need some grease.

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2017 2.5i Fozy CVT
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,,,Sil-glyde silicone brake grease.other synthetic petro greases swell the sc life pin bushings and seize the pin.
 
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