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2019 Audi S4 — brake fluid is old but still looks clean

WrenchDetailer631Community StarterJan 15, 20262019 Audi S4 Premium PlusNorthern Virginia
2019 Audi S4 Premium Plus, about 120,500 miles. Fluid looks clear in the reservoir but has been in the car for several years. Would you change based on time/moisture rather than appearance? I am in Northern Virginia. What would you check next?
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3 replies

WrenchDetailer631Community StarterCommunity StarterJan 15, 2026permalink
Following up on brake fluid is old but still looks: still happening, but I have better notes now. I'd rather look cautious in this thread than stuck later.
ManualMiles4Community StarterCommunity StarterJan 16, 2026permalink
That's a good start, but I wouldn't stop there. Verify the cheap/easy branch on the 2019 Audi S4 before a big repair or a big spend. Then you'll know the next fork. That's the whole play. I'll update if anything new shows up.
TorqueGeekCommunity StarterCommunity StarterJan 15, 2026permalink
Owner notes beat generic advice here. On the 2019 Audi S4 in Northern Virginia, I'd fix the thing you'll notice every day before chasing spec-sheet extras. That's where I'd start. On “brake fluid is old but still looks,” that was the fork that mattered for me. This is from a 2019 Audi S4 in Northern Virginia with 120,500 miles. That's the sequence I'd use. That's my plan before I call anyone.
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