What Causes the Noise in the Brake Pedal Return Spring?

[StEmmett]

Here are the specific reasons for the noise in the brake pedal return spring: 1. Damaged Brake Master Cylinder: The noise during brake pedal rebound could be due to a damaged brake master cylinder. When the internal components of the master cylinder are damaged, the efficiency of oil supply and return is significantly reduced, preventing the brake pedal from resetting promptly. This mechanical misalignment can cause noise during rebound. 2. Use of Inferior Brake Fluid: Using low-quality brake fluid may also lead to noise or even failure during brake pedal rebound. Expired brake fluid has poor fluidity, is prone to overheating and boiling, and can generate air bubbles, resulting in insufficient braking force. Excessive air bubbles can cause noise during rebound. It is recommended to replace the brake fluid and perform a bleed. Generally, brake fluid should be replaced every 2 years or 40,000 kilometers.