Reasons For Buzzing Sound When Turning Key In Ignition

A common issue with cars is a buzzing sound when turning key in ignition. The starter buzzing sound from a vehicle is very common and happens in all types.

Most of the time, drivers repair certain parts even though they are unaware of the exact problem. Before investing any money, it is essential to identify the issue and determine its root cause.

What Is The Meaning Of Buzzing Sound?

Buzzing Sound When Turning Key In Ignition

When you turn the key, you can notice a buzzing noise frequently caused by a weak electrical current. Typically, the noise comes from the bad starter relay.

It cranks the starting and draws the car battery down until the relay field opens, at which point it shuts the relay field and the starter contacts.

All the electrical current does is activate the solenoid plunger while making a fruitless attempt to engage the pinion gear and flywheel.

The starter receives electrical power, but more is needed to activate it. You need to be able to engage the flywheel using your crucial starter.

A relay can close the starter contacts if the field is supplied with adequate power.

This process keeps repeating, which is what creates the buzz. You must check the battery wires and terminals carefully for corrosion.

Buzzing Sound When Turning Key In Ignition: The Reasons

A buzzing noise when turning the ignition means that your car battery is most likely the source of the issue.

The engine may not, therefore, receive enough power to function. You may hear a buzzing sound when trying to start the car for the reasons listed below.

Low Current Electricity

One of the most common reasons for the buzzing sound when trying to start a car is low current electricity. The power required to start the ignition can be reduced by the voltage level.

There is insufficient current flowing to the starter of the motor to start an engine. The appropriate electrical current is required for the engine flywheel to operate.

The engine then receives help from the flywheel to start the car. As a result of the low voltage levels, pressing the ignition key causes a buzzing sound.

Faulty Flywheel

A flywheel is necessary to start an automobile engine with only one cylinder.

The ignition switch, which controls the cranking motor, is attached to it. Maintaining a consistent speed and reducing engine stress or friction are among its additional duties.

The wheel quiets any intrusive noises and keeps the engine moving steadily. Any flywheel wear or damage may negatively impact the performance of the starter motor.

As a result, when the automobile tries to start, you can hear the car buzzing when trying to start. When the wheel’s condition affects the cranking motor, certain noises begin to occur.

Problems With Starter Motor

Additionally, we notice a lot of issues related to lousy starter motors. Your engine is in charge of starting it and starts the engine by drawing power from the car’s battery.

There will be lights coming from the dashboard and car meter, but your engine won’t run, and there might be a persistent clicking noise.

If you continue to turn the key in a car with a defective starter, smoke could pour out of your vehicle.

Like any other electrical component, a starter motor might malfunction owing to intense heat and excessive workloads.

The starter and solenoid may need to be replaced, depending on how worn out the pinion/drive gear is.

Battery Problems

Dead batteries are also a frequent issue in this area. You should listen closely to the noise.

The electrical system may have broken wires. Additionally, the terminals themselves might need to be fixed. The engine-delay starting may result from some electrical circuit issues.

If you hear short clicks instead of metal-on-metal grinding, the battery is probably dead and needs to be replaced.

Buzzing Sound When Turning Key In Ignition: The Solutions

Battery’s Cleaning

A starter that is faulty or has a dead starting battery will typically make a buzzing sound. Listed below are some methods you can use to lessen the issues.

Raising The Voltage

The starting supply is insufficient to fire the car when there is inadequate electric current. There are a few solutions.

You could attempt to charge the battery. It might recharge, mainly if something happens to drain the battery.

The battery terminals of another vehicle might be connected to your car’s to try jumpstarting.

Before replacing your battery and alternator, several auto parts retailers can check to see if they are damaged. A dead battery may result from a defective alternator.

After that, you must keep another car running while starting your engine when your car has enough power to generate a large amount of electric current.

You won’t need to be concerned when the car battery makes a buzzing noise.

Making Flywheel Repairs

The flywheel structure’s flaws make it less functional. It can be quite challenging to solve these problems on your own.

It can be challenging to replace an engine flywheel. However, it should be optional to consult a mechanic if you are reasonably knowledgeable about your car’s internal workings.

You should take your automobile to the expert if you need more experience. They will evaluate the flywheel’s condition and utilize special equipment to repair the wheel’s crack.

Additionally, if the sound persists, there may be a problem with the wiring connecting the starter solenoid and flywheel. Therefore, ensuring that all connections stay secure is crucial.

Battery’s Cleaning

Corrosion-induced cable damage can prevent your cell from providing adequate electricity. Keeping your battery connections in good shape is essential to avoid ignition problems.

To neutralize and remove the corrosion, you could apply baking soda and water paste or use a battery cleaning spray. Clean the corrosion off the terminals with a wire brush if there is a lot of it.

Contacting The Professionals

The best action is to take your automobile to a mechanic if none of the above fixes work for you and it won’t start. You could get in touch with the maker of your car.

They can identify the precise reason behind the buzzing noises. In such circumstances, a qualified locksmith can fix the ignition system, saving you the expense of going to the mechanic or dealer.


Why Does Ignition Make Noise? 

A loud ignition usually means there’s an electrical issue. The difficulty is that numerous components in your engine could be to blame for that electrical trouble.

It can be an easy issue to resolve. The sound of your starter motor buzzing indicates that it isn’t receiving enough electrical current to engage.

However, there is a good chance that the problem is only a filthy, corroded, or depleted battery.

How Can I Know If My Ignition Is Faulty?

Problems with the ignition switch can range from minor ones like dim interior lighting to more serious ones like the key not turning or the car stalling or not starting.

Make an appointment with a competent specialist to get your automobile back on the road.


One of the most frequent problems that prevent your vehicle from starting is a buzzing sound when turning key in ignition. There may be some causes for this issue.

However, we’ve provided a list of solutions that can assist you in finding a solution.

Whenever a problem persists, you must go to an auto repair company.

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