What Causes the Zizzing Sound at Low Speed?

[Davis]

This noise could be coming from the suspension system or the braking system. It is recommended that car owners visit a 4S shop for inspection. Below are some related explanations: 1. Suspension Aging Issue: The suspension is a crucial component of a car. Over time, the suspension may produce abnormal noises. There are many rubber bushings in the suspension, which may age after prolonged use, leading to noises during driving. When the suspension bushings age, they need to be replaced to resolve the noise issue. 2. Shock Absorber Problem: The shock absorbers of a car may also produce abnormal noises after long-term use. Shock absorbers are wear-prone parts and need replacement over time. Some cars may experience oil leakage in the shock absorbers after prolonged use, which requires replacement. 3. Braking System Malfunction: The braking system includes the vacuum booster pump, master cylinder, and wheel cylinders (commonly seen as brake calipers). If the wheel cylinders have retraction issues, the car may produce abnormal noises at low speeds. The braking system is vital for driving safety. If any malfunction occurs, immediate repair is necessary.

[LeAniyah]

I've been driving for many years, and the most common cause of a squealing sound at low speeds is an issue with the braking system. The brake pads might be nearly worn out, or there could be rust or debris on the rotors, causing that harsh grinding noise when lightly applying the brakes at low speeds. Another possibility is insufficient lubrication of the brake caliper guide pins, leading to abnormal friction. Ignoring this not only makes the noise annoying but also shortens brake life and could even cause accidents. I recommend first checking the brake pad thickness yourself. If they're too thin or unevenly worn, it's time for new ones, and don't forget to clean any debris off the rotors. These issues are inevitable as a car ages, so regular brake maintenance is key to safe driving.

[DelaneyDella]

As someone who enjoys tinkering with cars, a low-speed buzzing noise is likely related to the drive belt. The belt may not be tight enough during engine operation or could be aged and cracked. Especially when the car is just starting and accelerating slowly, friction between the belt and pulley can cause noise. I've encountered this issue myself, and replacing it with a new belt made it quiet again. Don't forget to check if the belt tensioner is faulty, and also consider the air conditioning compressor belt as another potential source. This problem isn't too complicated; you can DIY with simple tools to test the tension or visit a repair shop to replace it, saving both money and hassle. Car noise affects the driving experience, so addressing it early can prevent bigger issues.

[LeonardoMarie]

From a female car owner's perspective, the low-speed buzzing noise might be caused by wear and tear in the chassis or suspension components, such as a loose ball joint in the tie rod or shock absorber issues. This type of sound often occurs when turning at low speeds on bumpy roads. I've noticed the noise is more pronounced at night, so it's advisable to check these parts for any gaps or damage. Addressing the issue early can prevent handling instability, and repairs are relatively inexpensive—simply replacing the affected components will suffice. Paying attention to unusual sounds during daily driving helps ensure safety.

[KendraAnn]

After driving a new energy vehicle, I understand that the low-speed buzzing sound can sometimes be an issue with the electrical system, such as the normal electromagnetic noise from the high-voltage battery or drive motor during acceleration and deceleration. However, if the sound is abnormal, it may indicate a component failure. In traditional fuel vehicles, the generator or alternator belt can also produce similar noises. It's recommended to identify the direction of the sound before proceeding with repairs and not to overlook this potential hazard. New issues in the electric vehicle era require professional diagnosis.