How to Check Brake Fluid?

[JuneLee]

After opening the engine compartment cover, you can directly see the upper and lower scale lines on the outside of the brake fluid reservoir. The brake fluid level must be between these upper and lower limit lines. Below is relevant information: 1. Brake fluid is generally replaced every 2 years or approximately 40,000 kilometers. This is not absolute and depends on the vehicle's usage. Brake fluid has certain corrosive properties and strong water absorption, so a dedicated brake fluid tester can be used to check the moisture content in the brake fluid. You can also observe the color of the brake fluid; if it appears black, it is likely time for replacement. 2. When the heat generated by the friction between the brake pads and brake discs raises the temperature of the brake system to the boiling point, the moisture in the brake fluid will boil and produce bubbles. Since gas is compressible, when there is a certain amount of bubbles in the brake lines, pressing the brake pedal will feel soft, and the braking force will be noticeably insufficient. In severe cases, braking force may even be lost.

[AdelynRose]

I've been driving for many years, and checking brake fluid is a simple yet crucial safety step. After parking, wait for the engine to cool, open the hood, and locate the plastic reservoir with the brake symbol in the engine bay—usually semi-transparent for easy fluid level inspection. The fluid level must be between the MIN and MAX marks; if it's low, don't drive as there might be a leak. Brake fluid is highly hygroscopic, absorbing moisture over time, turning dark and cloudy, which reduces braking efficiency and increases the risk of brake fade. I check the fluid level and color every two weeks: new fluid is light yellow and clear, while old fluid darkens, signaling it's time for a change. When low, I top it up with professional-grade brake fluid, ensuring compatibility with my car model (e.g., DOT3 or DOT4). I recommend a full replacement at a repair shop every two years to confirm the system is leak-free. Remember, never mix other liquids—they can corrode parts and degrade overall performance.

[Turner]

As a new driver, I just learned how to check the brake fluid, which is quite useful. After parking and turning off the engine, open the hood and look for a small round reservoir in front of the windshield, marked with a brake symbol. Squat down to check that the fluid level is between the MIN and MAX lines. If it's too low, buy a bottle of original brake fluid and top it up, but don't exceed the MAX line. The color should ideally be clear; if it turns dark or cloudy, it means it's time for a replacement, as absorbed moisture lowers its boiling point and can cause issues during braking. I've checked that the brake fluid type must match the manual to avoid using the wrong one. After topping up low fluid levels, I always drive a short distance to test if the brakes feel normal—low levels often indicate worn or aged brake pads. It's recommended to have a mechanic inspect and replace the fluid during every 20,000 km maintenance to ensure driving safety—don't skimp on this small expense.

[LeJasper]

I am very cautious when inspecting the brake system, especially when checking the brake fluid. After ensuring the car is parked and cooled down, open the hood and locate the small reservoir marked with the brake symbol. The fluid level must be between the MIN and MAX marks. A low fluid level may indicate a potential leak—avoid tampering and visit a professional shop. If the brake fluid appears dark or contains sediment, replace it immediately to prevent performance degradation and potential accidents. Since brake fluid is highly hygroscopic, prolonged neglect can weaken braking power. I perform a simple check every six months but leave the complete replacement to the mechanic during annual maintenance. Always use the original manufacturer-recommended brake fluid type, as incorrect additives can damage the brake calipers.

[SkylarLynn]

Family car safety is very important. I check the brake fluid status every weekend. After opening the hood, locate the brake fluid reservoir on the right side of the engine compartment - it's easy to identify. Maintain the fluid level between the marked lines for ideal conditions. New fluid is pale yellow and clear, while old fluid darkens. Low fluid level requires topping up, but avoid overfilling - use a funnel to prevent spills that could corrode vehicle surfaces. Change brake fluid regularly every two years to prevent internal rust and brake fade. I set reminders during seasonal changes. Choose brake fluid that matches your vehicle model - using the wrong type affects hydraulic system efficiency. Proper braking performance protects your family's travel safety.