[LA1Z24]

I have a strange failure on my hands over here. Recently under hard braking, I have been losing brake pressure. It felt like something was bypassing. I hadn't noticed any leak puddles so I figured the master cylinder was going.

This evening I see my right front caliper is leaking from the halves where they bolt together.

All the rebuild kits omit these orings.

Does anyone have a confirmed part number, or better yet a link to these o rings? The parts are not available from bmw, only a complete caliper.

Thanks

[bigshooter]

Can you share a pic?

[AspektUSA]

https://www.fcpeuro.com/products/bmw...it-34116850935

These?

Could also try contacting Brembo to see if they have any aftermarket parts available.

[Eschmacher]

They're referring to the gasket between the two halves of the caliper, not the piston seals.

I have never heard of this kind of failure. To be honest, you are probably better off sourcing a single caliper off ebay or someone on here and replacing yours. Way easier than the amount of effort you'll go through trying to source the gasket and then rebuild the caliper.

[_ObiJon]

I'm assuming it's the small one in these kits?

https://www.rockauto.com/en/catalog/...epair+kit,1720

[Eschmacher]

Originally Posted by _ObiJon

I'm assuming it's the small one in these kits?

https://www.rockauto.com/en/catalog/...epair+kit,1720

oh, that's it for the crossover tube? I was expecting something larger and more complex.

[casualDIYer]

Originally Posted by Eschmacher

They're referring to the gasket between the two halves of the caliper, not the piston seals.

I have never heard of this kind of failure. To be honest, you are probably better off sourcing a single caliper off ebay or someone on here and replacing yours. Way easier than the amount of effort you'll go through trying to source the gasket and then rebuild the caliper.

I've never heard of it either. OP, are you sure the drip is not coming out of the piston? If the dust boots fail, the brake piston can be contaminated with dirt and prematurely wear away at the inner square cut seal allowing fluid to leak out from the piston cylinder. There is a small gasket between the two halves of the caliper allowing fluid to flow from one side to the other but I am perplexed how that could fail.