Why Does the Vehicle Make Abnormal Noises?

[OMason]

Here is an introduction to the "zi zi" abnormal noise during vehicle driving: When a vehicle makes a "zi zi" noise, it is possible that there is a problem with the brake pads. The brake pads may have worn thin, causing direct contact between the brake drum and the vehicle, resulting in metal friction. In this case, the brake pads need to be replaced. Additional information on when to replace brake pads: 1. Front brake pads generally need to be replaced every 30,000 to 50,000 kilometers. 2. Rear brake pads can be replaced after driving approximately 60,000 to 100,000 kilometers. 3. New brake pads are typically about 1.5 centimeters thick, and there is a protrusion at both ends of the brake pads, approximately 3 millimeters. If the thickness of the brake pads is level with this mark, they should be replaced immediately. 4. If a metal friction sound is heard during braking, it may indicate that the brake pads have worn down to the protrusion position, causing friction with the brake disc and producing abnormal noise. Immediate replacement is necessary. 5. If the brake pedal feels lighter than usual or if braking feels difficult or ineffective, it also indicates severe wear and insufficient thickness of the brake pads, requiring prompt replacement.