![]() ![]() Not changing the fluid exactly at 3 years will probably not be fatal, but waiting for the brakes to fail before flushing the fluid is stupid. Brakes can overheat and fade from overuse such as descending a long hill or frequent hard use. If the brake fluid gets too hot and boils, the gas in the hydraulic system will lead to spongy brake feel or even brake failure. Water and any other contaminant lowers the boiling point of brake fluid. Brake fluid is hygroscopic, meaning it absorbs water from it's surroundings. The braking system is hydraulic, meaning it relies on incompressible fluid pressure to actuate the pads. URSnshn wrote: ↑ Sat 4:52 pmIs it necessary to replace brake fluid on a car every 3 years or not? Why does the car manual advise me to do this? I don't have a Honda, but personally plan to do this in every car I own every 5 years. ![]() A 5 year interval is probably safe, or even never if you live in an arid climate.Ī fluid change should not wait for a braking issue. The 3 year recommendation is a relatively safe one, and depending on all of those factors, especially the typical humidity level where you keep and drive your car. Atmospherics as in do you live in a dessert, a rain forest, or somewhere in between. That's a complex function of time, brake system design, atmospherics and the type of fluid you use. The need to replace brake fluid is a function of how much water your brake fluid has absorbed. Is it necessary to replace brake fluid on a car every 3 years or not? Why does the car manual advise me to do this? They asked me if I had ever replaced it on the previous car I owned - well I don't recall ever doing it every 3 years for sure - as to if I ever I had it done or not I don't know. My independent car place thought it was bogus and there was no reason to do it unless there was some kind of braking issue. My Honda Accord manual tells me to replace the brake fluid every 3 years. ![]()
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