What are the signs that brake fluid needs to be replaced?

2 Answers
Willow
07/25/25 2:55am
Signs that brake fluid needs to be replaced: 1. During continuous or emergency braking, the brake warning light may intermittently flash, indicating a decrease in brake fluid level. Immediate inspection and replacement are necessary to avoid affecting braking performance; 2. When driving normally at 40km/h and applying sudden braking, if the braking distance becomes longer and it's not due to worn brake pads, the issue likely lies with the brake fluid; 3. When brake fluid deteriorates, the brake pedal may feel spongy even when fully depressed, and this sensation becomes more pronounced with continuous or frequent braking, making the pedal feel softer and more elastic.
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CarlosMarie
08/10/25 4:46pm
Having driven for over twenty years, my experience tells me there are quite a few signs indicating it's time to change the brake fluid. The most common one is when the brake pedal feels spongy when pressed, requiring a deeper push than usual to stop the car, as if air has gotten into the system. Last week during a long-distance trip, the brakes were hissing on downhill mountain roads. Upon checking the reservoir, I noticed the fluid color had changed from light yellow to dark brown, indicating it has absorbed too much moisture, lowering the boiling point. This can cause overheating and failure during emergency braking, posing significant risks. Additionally, if the fluid level keeps dropping, frequently topping it up won't solve the root issue. I recommend checking it every two years or 20,000 kilometers—replacing it early ensures peace of mind and prevents sudden accidents. I've developed a habit of regular maintenance to avoid trouble on the road, and it's truly worth it!
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