How to Add Brake Fluid?

[SilasMarie]

Brake fluid adding method: First, open the car hood, locate the brake fluid reservoir, open the reservoir cap, and add brake fluid. Normally, the water content in brake fluid should be below 1%. Brake fluid is the liquid that transmits force in the braking system and is crucial for driving safety. When the water content in brake fluid reaches 3%, the boiling point of the brake fluid will decrease by 25%. Below is a detailed introduction to the hazards of excessive water content in brake fluid: Since brake fluid has strong water absorption, if the water content is too high, it will lower the boiling point of the brake fluid. Over time, a large number of bubbles will form in the brake lines, which can significantly affect the performance of the braking system. This is because the braking system generates high temperatures during operation, causing the water in the brake fluid to vaporize. This makes the gas easy to compress, leading to dangerous situations such as soft brakes, weak braking, or even brake failure. During routine maintenance, a brake fluid water content tester can be used to determine if the brake fluid needs to be replaced. For new brake fluid, the water content is approximately 0%, and the standard should not exceed 2.5%. If it exceeds 2.5%, the brake fluid should be replaced.

[MacLucy]

Finding the brake fluid reservoir is easy—just open the front hood, and it’s usually located near the engine, labeled with “Brake Fluid.” Remember to wipe the area around the cap clean to prevent dirt from falling in. When opening the cap, do it slowly. If the old fluid appears dark or is too low, it’s time for a replacement. Use the manufacturer-recommended fluid type (DOT3 or DOT4) and avoid mixing them—fill only up to the MAX line. After adding fluid, sit in the car and pump the brake pedal several times until it feels firm, indicating the air has been bled out. Doing this yourself saves money, but if done improperly, the brakes may feel spongy. Beginners are better off seeking professional help, as this is a critical safety issue. Check the fluid level monthly and top it up promptly if low—don’t wait for problems to arise.

[ColeLynn]

Before adding brake fluid, park the car and turn off the engine, letting it cool for half an hour. Hot fluid expands and gives inaccurate readings. Locate the translucent reservoir in the engine bay and wipe off any dust before opening the cap. Use a funnel when pouring new fluid to avoid spills, and ensure the level doesn't exceed the MAX mark. After refilling, pump the brake pedal a dozen times until it firms up—this indicates successful air bleeding. Last time I forgot to bleed the system, the brakes felt spongy and I nearly rear-ended someone. Always buy the correct type; for example, don’t use DOT3 in a DOT4 system. Replacing the fluid every two years prevents moisture buildup and corrosion. DIY saves money, but if unsure, visit a repair shop—safety first.

[VonRiver]

First, check the owner's manual to confirm the oil type, such as DOT4. Open the engine hood and locate the brake fluid reservoir, a small round container. Check the fluid level when the engine is cold, and top it up if it's low. Open the cap slowly and carefully, then pour new fluid up to the middle mark. After filling, pump the brake pedal until it feels firm. Remember to keep the reservoir opening clean to avoid dust contamination. Check the fluid level every six months and top it up early if you notice a decrease.