What Causes Abnormal Noise from the Chassis When Braking at Low Speed?
2 Answers
Abnormal noise from the chassis when braking at low speed may be caused by worn brake pads, loose chassis components, aging rubber parts of the chassis, or lower arm failure. Extended Information; Solutions for Brake Pad Noise; 1. Replace Brake Pads: For excessively worn brake pads, the owner should promptly visit a repair shop to replace them. While the noise itself may not be a significant issue, the braking performance can be greatly affected. Hard brake pad material is generally an issue with ordinary vehicle models. To address this, you can replace the brake pads with NAO-formula pads, low-metal content pads, or ceramic pads, which typically do not produce noise. However, avoid replacing them with overly soft brake pads. 2. Daily Brake Maintenance: For daily care of brake pads and the chassis, it is essential to develop good driving habits. When passing over speed bumps, reduce speed before crossing; try to avoid crossing on one side or braking while passing. When road conditions deteriorate, reduce speed and drive smoothly, avoiding potholes to minimize bumps and protect the suspension system.
As an experienced driver with years behind the wheel, I've encountered that high-pitched squeaking sound from the chassis during low-speed braking several times. This is usually caused by rust or contaminants on the brake disc surface, especially noticeable after rainy or humid conditions. At low speeds, the braking force is insufficient to remove the rust layer, leading to the noise. Another common reason is aged brake pads or the use of inferior materials, where irregular friction surfaces generate noise. Additionally, loose ball joints or connection points in the chassis suspension can also produce rattling sounds, requiring checks for component looseness. I recommend starting with simple solutions, like applying the brakes several times to see if the noise disappears. If that doesn't work, it's best to visit a professional repair shop promptly. Long-term neglect could damage the braking system and compromise driving safety. Regular maintenance, such as cleaning brake discs, can prevent such issues.
