4 Main Reasons Why My Car Makes Humming Noise When Accelerating or Driving

A car is a lot more than just a medium of transportation, and therefore, when it is troubled because of any unexpected issues, you should be ready for it in the first place. One of the significant problems is your car making a humming noise only when accelerating.

Although different sounds are familiar, and it is unnecessary to take precautions for these noises, a humming noise is additional. It would be best to keep in mind that it can occur at sudden times when you are accelerating. Therefore, you must find the exact reason and look for the solution accordingly.

Main reasons behind car humming noises

Usually, a humming noise during acceleration doesn’t start unless the vehicle reaches around 2000 rpm. This sound may not be that loud, but it isn’t faint enough to ignore. The following are the main reasons for this particular sound.

  • Bad bearings


You will have to warm up the tires if you want to find out whether or not it is a bad bearing. It is better to choose a place with no traffic and then frequently move your car back and forth. You will find the pitch changing if this happens because of a bad bearing. If it isn’t a bad bearing, then it certainly is a problem with the tires.

How To Understand That Your Wheel Bearing Are Broken?

If you think the humming noise is caused by worn bearings, you can check it yourself. There are several ways to tell if your wheel bearing is broken. One way is to simply listen for a grinding or humming noise coming from the wheel area while driving. Another way is to check for play in the wheel by grabbing it at either 3 and 9 o'clock or 12 and 6 o'clock and trying to move it back and forth. If there is any give or play in the wheel, that is a sign that the bearings are most likely worn out. Finally, you can also check for excessive heat coming from the wheel area. If the bearings are excessively hot, that is another indication that they need to be replaced.

  • Problems With Tires

Underinflated Tires


When your tires are underinflated, they can flex too much as they rotate, which can create a humming sound. This is especially true at higher speeds. If you hear this type of noise, check your tire pressure and inflate your tires to the recommended level.

Worn-Out Tire


Another common cause of tire noise is worn-out tires. When your tires are worn, they can start to make a humming sound as well. This is because the tread on the tires is not as thick as it used to be, so they can’t absorb the road noise as effectively. If you have worn-out tires, it’s important to replace them as soon as possible.

Misaligned Suspension


Finally, tire noise can also be caused by a problem with your suspension. If your suspension is not properly aligned, it can cause your tires to rub against the inside of your wheel well, which can create a humming sound. If you think this might be the problem, take your car to a mechanic and have them check your suspension.

  • Issues with cylinder compression


A good engine should always roar but should never be loud. If you find the vehicle making a humming noise only when accelerating, you may have a problem with the cylinder compression. It is worth noting that if you find any uneven air-fuel ratio in the cylinder, then there is a possibility that combustion may happen at low or high rates on average. If this problem is not solved, it can damage your engine.

  • Problems with the engine

Several issues related to the engine can be responsible for causing humming noise only when accelerating. It is never easy for you to find the exact source of the problem because you may face a couple of issues. You may need to have a complete engine checkup to find any troubling components. If that is the case, you will need a professional mechanic's help.

Do not rely entirely on your own efforts, and it is better to give the car to the master, who will accurately determine the cause of the humming sound. But still, you can do some engine diagnostics by yourself - check the timing belt, as well as the alternator belt, and the condition of the alternator itself. Very often the wear and tear of these components cause the humming noise.


  • Steering issues

A couple of steering system issues can also create humming noise in a car. It could either be a loose steering belt or a misaligned steering wheel. If your steering wheel is not in the correct position, you will have a humming or whining noise when the car speed increases. You will be facing the same problem when you have a loose steering belt.

How To Align Your Steering Wheel?

If your steering wheel is not aligned properly, this can not only cause a humming noise, but it can cause your vehicle to pull to one side or the other. This can be extremely dangerous, especially if you're driving at high speeds. That's why it's important to make sure that your steering wheel is properly aligned at all times. But how do you align your steering wheel? Here's a quick guide:

1. Park your vehicle on a level surface and set the parking brake.

2. Adjust your seat so that you're comfortable and can reach the pedals easily.

3. Grab the steering wheel and move it until it's centered in front of you.

4. Hold the steering wheel in place and turn on the ignition.

5. With the engine running, slowly turn the steering wheel to the left until it stops.

6. Hold the steering wheel in place and turn on the ignition.

7. With the engine running, slowly turn the steering wheel to the right until it stops.

8. If the steering wheel is not centered, repeat steps 5-7 until it is.

9. Once the steering wheel is centered, turn off the ignition and set the parking brake.

10. Get out of the vehicle and check to make sure that the tires are pointing straight ahead. If they're not, adjust them accordingly.

Now that you know how to align your steering wheel, it's important to do so on a regular basis. This will help keep you and your vehicle safe on the road.

Final Thoughts

It is always recommended that you consider all the possibilities and act accordingly when you work on issues related to your vehicle. If you happen to find out that your car is making a humming noise only when accelerating, then there is a possibility that it might be a malfunction that you might be able to solve without having the new parts replaced.