What are the symptoms of a faulty brake slave cylinder?

2 Answers
SanZachary
07/29/25 2:25am
The symptoms of a faulty brake slave cylinder are: 1. Soft brake pedal; 2. Sudden brake failure; 3. Brake pulling to one side; 4. Brake pedal not returning or slow to return. As a key component of the vehicle's braking system, the brake master cylinder is crucial, but this part has a high failure rate and directly affects braking performance. The brake slave cylinder is an indispensable chassis braking component in the braking system. Its main function is to push the brake pads, which then rub against the brake drum to slow down or stop the vehicle. When the brake pedal is pressed, the master cylinder generates thrust to push hydraulic fluid to the slave cylinder. The piston inside the slave cylinder moves under hydraulic pressure to push the brake pads.
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JaxsonAnn
08/12/25 6:23am
Speaking of the symptoms of a failed brake master cylinder, I've personally experienced it. When driving and pressing the brake pedal, it felt unusually soft, lacking the usual resistance. It would sink deep with just a slight press, and the rebound after releasing was extremely slow. The braking performance was significantly reduced, and during emergency stops, the car would slide forward with a frighteningly delayed response. Later, I noticed the brake fluid level was low, and there were oil stains leaking on the garage floor. Upon inspection, it turned out the master cylinder's seals were damaged. This cylinder is responsible for transmitting hydraulic pressure; if it leaks or is internally damaged, the pressure can't build up, and the wheels won't brake effectively. This is especially risky on mountain roads or highways. If the brake warning light on the dashboard comes on, it's a clear warning sign. Don't delay—pull over immediately to check the fluid level or call for a tow truck. Otherwise, a minor issue could turn into a major accident, which isn't worth the risk. During regular maintenance, pay extra attention to the wear condition of the cylinder to prevent problems before they occur.
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