Black crusty stuff inside brake reservoir

[Davin Yap]

I have a 2015 Proton Saga FLX, what’s that crusty black stuff inside my brake reservoir? Does it mean something bad has happened to my brakes? Or just a bad reservoir cap? No spongy brake peddle or any weird feeling whatsoever. Only the occasional brake grinding off the rust sound everyone I park my car for a few hours. Malaysia is a humid tropical country btw.

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[Mike]

It certainly isn’t anything normal that we see in the US and I wouldn’t want those particles to start blocking any brake fluid passages.
If your car is still covered by the manufacturer’s warranty, bring the car to the dealer’s service department and have them explain why this is happening.
It may be a known problem.
Your dealer might insist on replacing the brake fluid and, in a country as humid as Malaysia, this is recommended every 20K km, anyway.

[dan]

[quote=”Bonnieman” post=188335]It certainly isn’t anything normal that we see in the US and I wouldn’t want those particles to start blocking any brake fluid passages.
If your car is still covered by the manufacturer’s warranty, bring the car to the dealer’s service department and have them explain why this is happening.
It may be a known problem.
Your dealer might insist on replacing the brake fluid and, in a country as humid as Malaysia, this is recommended every 20K km, anyway.[/quote]

This is true, Break fluid with a exception of DOT 5 which is a silicone based fluid not used in cars is moisture absorbent, change your fluids frequently in those conditions. I agree with this statement, but to add, what do the small black peaces feel like when you hold or pinch them between your fingers? reason being the only thing that I can think of are the possible rubbers seals inside your master cylinder breaking apart and getting into your master cylinder.

[Author]

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