What are the symptoms indicating brake fluid needs replacement?

[QuinnDella]

The symptoms indicating brake fluid needs replacement are: 1. The brake warning light alarms or flashes during emergency braking or continuous braking; 2. The braking distance becomes significantly longer than before during emergency braking; 3. The brake pedal feels soft or weak when pressed; 4. The braking force feels inconsistent (sometimes light, sometimes heavy) during braking. The steps for replacing brake fluid are: 1. Park the vehicle on level ground, turn off the engine, open the hood, and drain the fluid from the reservoir; 2. Use a funnel to fill the reservoir with new brake fluid; 3. Jack up the vehicle and start removing the tires from the rear wheels; 4. Remove the rubber dust caps on the brake calipers; 5. Loosen the bleeder screws with a wrench, attach a rubber tube to them, and connect it to a drainage bottle; 6. Have someone press the brake pedal inside the vehicle while observing the fluid drainage until the fluid level in the reservoir reaches the lower limit; 7. Start the vehicle and test the brakes in a relatively safe area.