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It could be there is water in the fluid. Brake fluid is hydroscopic by design, which means it absorbs any moisture to prevent that same moisture from eroding brake parts. But that means that over time the fluid loses it's ability to function correctly, especially at higher temps. I would say flush it and fill/bleed with good quality DOT 4.
It could be there is water in the fluid. Brake fluid is hydroscopic by design, which means it absorbs any moisture to prevent that same moisture from eroding brake parts. But that means that over time the fluid loses it's ability to function correctly, especially at higher temps. I would say flush it and fill/bleed with good quality DOT 4.