5 Causes of Cars Buzzing at Low Speeds & Their Solutions

The humming sound of a car engine can be a sign of problems with the engine, such as a car humming at low speeds which certainly makes the driver feel uncomfortable and quite disturbing. What causes it and how to solve it? Here’s the explanation.

Causes of Car Humming at Low Speeds

Here are some possible causes when your car sounds humming while driven at low speeds, among others:

1. Incorrect Tire Direction

Basically, car tires are designed to rotate in one direction. However, when the tires rotate, it is not uncommon for there to be a mistake in the direction of tire rotation, which affects the humming sound, especially when passing over asphalt.

Check the age of your car tires. If they are more than three years old, it is advisable to replace them with new ones for comfort and safety while driving.

2. Damaged Power Steering Pump

Damage to the power steering pump can also be a cause of the car humming at low speeds, especially if your car is a model from before 2012 which still uses a hydraulic power steering system with a pump.

This component is needed as an energy supplier to lighten the steering load, and it is attached to the engine. Damage to the pump due to wear can cause a humming sound when accelerating, or when the driver turns the steering wheel.

3. Worn AC Compressor

The next cause is a worn AC compressor. An AC compressor that is low on oil can create a humming sound when accelerating.

This humming sound may indeed originate from the AC compressor, where its metals are worn. When the worn metals continue to rub against each other, the resulting noise will be louder.

To identify this problem is also easy, as the humming and noisy sound can become more pronounced when the car occupants turn on the AC at the coldest setting.

4. Damaged Engine Pulley Bearing

Not only the AC compressor can wear out, but the pulley located at the front of the engine can also experience similar issues.

In the car hood, there are many pulleys connected, such as the idler pulley, alternator, tensioner, and engine. If one of them is damaged, it can cause a humming sound from the engine.

If this happens, take the car to the nearest workshop as it needs to be checked directly by a mechanic. This component has many types and is interconnected, making it difficult to detect which part is damaged.

5. Worn Wheel Bearings

Wheel bearing problems that are worn can also be a cause of the humming sound when the car is driven at low speeds, especially in the front as it functions to bear the vehicle's control load.

When the bearing wears out, a humming and quite loud friction sound will be heard. To check it, try to jack up the car so that it is lifted and then shake the wheel vertically.

How to Overcome Car Humming at Low Speeds

If the above happens to your car, take it to the nearest workshop for further handling. If not addressed promptly, it can spread and adversely affect other components.

Additionally, to prevent the car engine from humming at low speeds so that the engine runs smoother and is more comfortable to drive, check out the tips below:

1. Use Oil According to Specifications

Many car owners use oil that does not meet the manufacturer's specifications. In fact, using oil that does not meet the specifications can make the car engine less smooth. To find out the best oil recommendations that match your car's specifications, you can see the post here!

2. Check External Engine Components

Also, check the external engine components, as noisy and rough engine sounds may be caused by the external parts of the engine. For example, the fan belt, fan belt tensioner, alternator, pulley, and cooling fan.

Those are the causes of car humming at low speeds that you should know. If you experience the above and have difficulty addressing it, you can go directly to the nearest Daihatsu dealer. Hope it’s helpful!

Tips Sahabat