What does it mean to add brake fluid?
2 Answers
Adding brake fluid means the brake fluid level is insufficient. Here are the relevant details: 1. Insufficient brake fluid: It is recommended to immediately check whether there is leakage in the brake system pipelines and interfaces, or if the brake pads have worn to the usage limit. Open the engine hood to check the brake fluid level. If the brake fluid is at the upper limit, it indicates no shortage of brake fluid or no wear on the brake pads; if the brake fluid is at the middle or lower limit, it indicates oil leakage or wear on the brake pads, in which case the brake pads need to be replaced or repairs need to be performed. 2. Additional information: Replacement method: Park the car, open the engine hood, open the brake fluid cap, and then extract the oil. The air bleeding sequence should be carried out from the farthest to the nearest based on the length of each wheel cylinder oil pipe to the master cylinder, generally in the order of the right rear wheel, left rear wheel, right front wheel, left front wheel, and master cylinder.
I remember when I encountered the 'Please Add Brake Fluid' warning while driving, I was on edge the entire time. Brake fluid is the oil in the braking system, responsible for transmitting the pressure from the pedal to the braking mechanisms at each wheel. If the fluid level is low, the most dangerous scenario is that the brakes may completely fail, especially when slowing down or being unable to stop on the highway—the consequences are unthinkable. Common causes of low fluid levels include aging seals causing leaks or excessive wear on the brake pads. When new brake pads are installed, the fluid level may drop even more. I had to pull over immediately, pop the hood, and locate that transparent brake fluid reservoir. If the fluid level was below the minimum mark, I’d slowly top it up with dedicated brake fluid. Never add other liquids, as they can affect performance or even corrode components. After topping up, I’d also check if the brake pedal felt firm—if it was too soft, it meant air had entered the system and needed bleeding. Safety is no trivial matter; never delay addressing braking system issues. I recommend checking the fluid level monthly as part of routine maintenance, and if early signs appear, take it to a professional shop to avoid sudden emergencies.
