Car Sounds Like Lawn Mower – Causes And Fixes

Last updated on February 15th, 2023 at 11:28 pm

Car sounds like lawn mower can be a frustrating and embarrassing problem for car owners. It is not only annoying, but it can also indicate a serious issue with your vehicle.

In this article, we will discuss some of the common causes of this issue and provide possible solutions to fix it.

Whether you’re a car enthusiast or just someone who wants to keep their vehicle running smoothly, this information will be valuable in helping you understand and troubleshoot this type of issue.

What Causes Of My Car Sounds Like Lawn Mower

Leaking Exhaust

An exhaust leak can be a common cause of a car sounding like a lawn mower. This happens when there is a hole or crack in the exhaust system, allowing exhaust gases to escape before they reach the tailpipe. This can cause a loud, rumbling noise that sounds similar to a lawn mower.

Exhaust leaks can occur for a variety of reasons, including corrosion, damage from road debris, or improper installation. They can also be caused by a broken or loose exhaust hanger, which can allow the exhaust system to sag and come into contact with the road.

Exhaust leaks can be dangerous as they can allow harmful exhaust gases into the car’s cabin, and in some cases can cause a decrease in fuel efficiency and performance.

How To Fix It

A simple way to check for an exhaust leak is by parking your vehicle in a closed garage with the engine running, if you notice a strong odor of exhaust, it is likely you have an exhaust leak. It is best to get it checked by a professional.

Head Gasket Blown

A blown head gasket can cause a lawn mower-like noise in a car. A head gasket is a seal that sits between the engine block and cylinder head, and it helps to prevent coolant and oil from mixing.

When a head gasket is blown, it can cause coolant or oil to leak into the combustion chamber, which can cause the engine to make a lawn mower-like noise.

This typically happens when the engine is under heavy load or high stress, and the noise can be more pronounced when the car is accelerating or climbing hills.

The causes of a blown head gasket can include overheating, poor maintenance, or using low-quality oil.

How To Fix It

To fix a blown head gasket, the gasket will need to be replaced by a professional mechanic. This can be a costly and time-consuming process, and it may require the engine to be removed from the car.

It is important to regularly maintain your vehicle and address any issues as soon as they arise to prevent this type of problem.

Worn Out Tires

Worn out tires can also cause a car to sound like a lawn mower. When the tires are worn, the tread depth becomes shallow, and the tires lose their ability to grip the road properly.

This noise is more pronounced when driving on a smooth surface such as a highway. This noise is caused by the tires lacking the appropriate amount of tread to grip the road and the vehicle weight bearing on the tires causes the noise.

How To Fix It

Worn out tires should be replaced as soon as possible to avoid potential safety hazards and to restore proper performance.

To fix this issue, you need to replace the tires with new ones. It’s important to check the tire treads regularly and replace them when the tread depth is less than 4/32 of an inch. This will help prevent the noise, and also ensure that your car is safe to drive.

Always, check your tire pressure and make sure it’s at the recommended level. Properly inflated tires will reduce the noise and also help prolong their life.

Wheel Bearing Failure

A failed wheel bearing can cause a car to make a lawn mower-like noise, especially when driving at high speeds or making sharp turns.

The wheel bearing is a crucial component that allows the wheels to spin smoothly and quietly. When it fails, it can cause a loud, grinding noise that can be mistaken for a lawn mower.

The first sign of a failed wheel bearing is often a humming or growling noise that increases with speed. If left unchecked, this noise can become louder and more persistent, and may even cause vibrations in the steering wheel or through the vehicle.

This issue can happen due to a variety of factors, such as driving on rough or uneven roads, lack of regular maintenance, or exposure to water and other contaminants.

How To Fix It

To fix the problem, the faulty bearing needs to be replaced.

It’s important to address this issue as soon as possible, as a failed wheel bearing can lead to further damage to the suspension and steering components, and can also lead to unsafe driving conditions.

Regular maintenance and inspections of the wheel bearings can help prevent this problem from occurring.

Misfiring engine

An engine misfire can cause a car to make a sound similar to a lawnmower. When an engine misfires, it means that one or more cylinders are failing to create power.

This can happen for a variety of reasons, including a clogged spark plug, a defective oxygen sensor, or a blocked fuel injector.

Additionally, unburned fuel may be ignited by a spark from the following cylinder, which can also cause a lawnmower-like noise. This type of issue can happen due to regular wear and tear, lack of maintenance, or damage to the engine caused by driving conditions.

How To Fix It

In order to fix this issue, it’s important to diagnose the specific cause of the misfire and address it accordingly.

This may involve replacing a faulty part, performing routine maintenance, or making adjustments to the engine. Regularly checking and maintaining your car can help prevent this type of issue from happening.

Degraded Differential Fluid

Another common cause of a car sounding like a lawn mower is old or degraded differential fluid. The differential fluid is responsible for lubricating the gears in the differential, which helps to minimize friction and wear.

When the fluid becomes old or contaminated, it can no longer effectively lubricate the gears, leading to increased friction and heat. This can cause the gears to wear out prematurely, and in severe cases, they can even break. The result is a loud, grinding noise that can be mistaken for a lawn mower.

This problem typically occurs when the differential fluid is not changed regularly, as recommended in the car’s maintenance schedule.

Over time, the fluid becomes contaminated with metal particles and other debris, reducing its effectiveness.

The fluid can also become thick and viscous, making it harder for the gears to move smoothly. In some cases, the differential fluid may also start to leak, further exacerbating the problem.

How To Fix It

The differential fluid should be drained and replaced with fresh fluid to fix this issue. It’s also important to check for any signs of leakage or damage to the gears and to have them repaired or replaced as necessary.

Regularly changing the differential fluid is a good preventive measure and will help to ensure that your car continues to run smoothly and quietly.


Q: Is it expensive to fix a car that sounds like a lawn mower?

A: The cost of repair will depend on the specific cause of the problem. A simple fix, such as replacing a muffler, may be relatively inexpensive, while a more complex issue, such as engine damage, could be costly.

Q: Can a car that sounds like a lawn mower be dangerous to drive?

A: Yes, a loud and unusual noise from a car can be a sign of a serious problem that could affect the performance and safety of the vehicle.


I hope you enjoyed our article about Car Sounds Like Lawn Mower – Causes And Fixes as much as we enjoyed you and you get the useful information about this issue.

If you have any further questions or concerns, please feel free to reach out to us. We would be happy to help you troubleshoot and resolve the problem with your car.

Remember, regular maintenance and tune-ups can help prevent issues like this from occurring in the first place. Keep your car in good shape, and it will reward you with smooth and quiet operation for many miles to come.