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Why is the brake of Buick Excelle soft?

2 Answers

MelanieRose

07/29/25 11:16pm

There are several reasons for the soft brake of Buick Excelle: 1. Air in the brake oil pipe: If air enters the oil pipe, the brake oil will appear insufficient in strength under high pressure. Although there is still braking force, the maximum braking force is significantly weakened. At this time, the air should be exhausted at the maintenance station in time; 2. Water in the brake: The brake system is actually composed of a set of hydraulic system. The brake caliper is braked by the hydraulic transmission of brake oil. When braking, the brake pads and brake discs generate heat through friction. These heat is transmitted to the brake oil through the brake cylinder, eventually leading to the increase of the temperature of the brake oil. When the brake oil is at high temperature, water will vaporize to form compressible gas. These gases are not fixed in position and quantity in the brake pipeline, resulting in soft brakes; 3. Oil leakage in the brake oil pipe: Oil leakage in the brake master cylinder or brake oil pipe cannot ensure sufficient oil pressure; 4. Replacement of oversized tires: Too large tires will lead to insufficient brake torque and weakened braking force; 5. The brake pads are too soft: The material of the brake pads is too soft and the high-temperature performance is poor. Brake pads that meet national standards should be replaced.

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HadleyFitz

08/16/25 1:38am

I've been driving a Buick Excelle for several years and have encountered soft brake issues, which are generally caused by several common reasons. Low brake fluid level or aged/dirty fluid can make the pedal feel spongy and weak, requiring timely topping up or replacement with new fluid. If air enters the brake lines, the pedal travel becomes longer and braking force decreases, necessitating a brake bleeding procedure. Worn brake pads reaching their limit can also cause a soft feeling, requiring thickness inspection and replacement of new pads. Additionally, warped brake rotors or caliper issues may be the culprits. It's recommended to first check the fluid reservoir level and color—clear green is acceptable, while cloudy or dark-colored fluid needs replacement. If the problem persists, visit a professional repair shop. Soft brakes are dangerous as delayed response at high speeds can easily lead to accidents. Regular maintenance can prevent such issues, such as changing brake fluid every two years.

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