How to Add Brake Fluid to a Car?
2 Answers
To add brake fluid to a car: Open the car hood, locate the brake fluid reservoir, and open its cap to add the fluid. Brake fluid, also known as hydraulic brake fluid, is transmitted by the master cylinder to the wheel cylinders during braking. The wheel cylinders then press the brake pads against the brake discs under hydraulic pressure, bringing the car to a stop. The volume of brake fluid changes with temperature, and moisture can enter through the reservoir's vent, dissolving into the fluid and lowering its boiling point. When adding brake fluid, strictly use the type and specification specified by the manufacturer to avoid altering the fluid's performance and damaging the braking components.
I often add brake fluid to my car myself, which gives me a sense of accomplishment and saves on repair costs. First, find a safe place to park on level ground, turn off the engine, and let it cool for at least 30 minutes. Open the hood and locate the plastic brake fluid reservoir, usually near the firewall at the rear of the engine with a "BRAKE FLUID" label. Clean around the reservoir cap to prevent dust contamination, then carefully unscrew the cap without touching the fluid. Check the fluid level—if it's below the Min line, you'll need to add more. Only use the type specified in the manual, such as DOT3 or DOT4, and never mix them, as this can corrode the system. Slowly pour in the new fluid to avoid creating bubbles, which can lead to brake failure. Fill it just below the Max line to prevent overflow. Replace the cap and press lightly to seal it. Have a friend sit in the car and gently pump the brakes a few times to test the pressure. If everything feels normal, you're good to go. Check the fluid level quarterly—if it's consistently low, there might be a leak, and you should take it to a professional mechanic. Safety first—don't take risks with small issues.
