How many kilometers should car brake fluid generally be replaced?
4 Answers
Car brake fluid should generally be replaced every 2 years or 40,000 kilometers. The functions of brake fluid include: 1. Effectively lubricating the moving parts of the braking system, extending the service life of brake calipers and rubber cups; 2. Providing anti-corrosion and anti-rust protection, being non-corrosive to both metal and non-metal materials in the braking system; 3. Adapting to various environments, ensuring the flexible transmission of braking force under working conditions such as high temperature, extreme cold, high speed, and humidity; 4. Transmitting energy and dissipating heat. The characteristics of car brake fluid are: 1. Low freezing point: maintaining good fluidity at low temperatures; 2. Extremely high boiling point: preventing vapor lock at high temperatures; 3. Minimal quality changes: not causing corrosion or softening of metals and rubber.
I think about changing the brake fluid. I've been driving for over ten years, and I usually change it every two years or around 30,000 kilometers. This is because brake fluid absorbs moisture, and over time, the increased moisture can corrode the wheel cylinders and pipelines. Once, I delayed changing it until 40,000 kilometers, and suddenly the brakes felt soft, almost causing a rear-end collision. It scared me so much that I rushed to the repair shop to change the fluid. Since then, I've stuck to regular maintenance, and the brake response has been much quicker and safer. Just a reminder: different car models have different manual requirements. For example, SUVs might need more frequent changes due to heavier loads and more frequent braking, so it's best to check your car's manual. Regularly changing the brake fluid isn't costly—just a few dozen yuan for a bottle—but neglecting it could lead to major repairs costing thousands, which really isn't worth it.
From my experience working at the dealership, I recommend changing brake fluid every 20,000 to 30,000 kilometers, especially for frequent city stop-and-go traffic conditions. When brake fluid absorbs moisture, its boiling point drops, making brake failure more likely during high temperatures. I use DOT4 fluid because it's more stable and corrosion-resistant. If the fluid appears cloudy or has bubbles during level checks, it's time for replacement. Neglecting fluid changes can easily damage the ABS pump, resulting in expensive repairs. I advise customers to check brake pad wear simultaneously for cost-effective and safer maintenance. Considering seasonal factors, brake fluid absorbs moisture faster during rainy seasons, and with higher humidity in southern regions, I suggest shortening the interval to 18 months between changes.
As a parent of two children, I always prioritize driving safety. Not changing brake fluid on time is extremely dangerous. The manual usually recommends changing it every two years or 30,000 kilometers. When the fluid absorbs moisture, braking distance increases, making it easier to skid and cause accidents in rainy weather. I insist on regular changes, such as using DOT4 fluid for a longer lifespan, and checking the fluid color annually to ensure it remains clear. This way, the whole family can travel with peace of mind. I also teach new drivers to develop the habit of checking fluid levels to prevent accidents. Saving a little money might lead to big trouble—safety first, don’t be lazy. Remember to change it earlier in high-humidity conditions.
