Guide: Rear Brake Caliper Piston Rebuild

[dangerdred]

Apologies for the thread resurrection.

Does anyone know if following the OP method above and manually winding the piston in as described, after reassembling, is the EPB module able to figure out what the piston position should be? Is it just a case of putting it all back together and then doing a function test and it will all just settle down correctly? Also, is there some sort of gasket or seal between the motor housing and the caliper?

[NightOwl]

I've only done this with VCDS, and have never had any problem after cleaning and replacing seals on the rear caliper. Would like to think though, that cycling the hand brake would do the trick too. Between the motor and the caliper, there is a O-ring with parts number 4E0615137.

[dangerdred]

Originally Posted by NightOwl

I've only done this with VCDS, and have never had any problem after cleaning and replacing seals on the rear caliper. Would like to think though, that cycling the hand brake would do the trick too. Between the motor and the caliper, there is a O-ring with parts number 4E0615137.

Ah nice, thanks for that. I've bought two new rears at this stage and have two spares that I'm hoping to eventually refurbish - up to now I was gonna reuse the old o-rings.



Is it a thing on these cars that the rear caliper gets dogs abuse with caliper pistons getting corroded? - Replaced OSR caliper at 130k and now NSR at 140K.

[tc4332]

Originally Posted by dangerdred

Is it a thing on these cars that the rear caliper gets dogs abuse with caliper pistons getting corroded? - Replaced OSR caliper at 130k and now NSR at 140K.

I was having a problem where one of my neighbours with two golden labsused to let both of them use my son's offside rear a urinal post. He fell out with me when I spoke to him about it. Not the dog's fault, always down to owners.
I still have to have the occasional word with dog walkers not having poo bags with them.