Q: 2006 Mazda 3 makes a hum sound when accelerating. Sound is louder at higher speeds but stops when car is out in neutral and still

asked by on June 20, 2017

The car makes a loud hum when accelerating, gets louder the higher the speed. Seems like it's wanting to give out the faster you go, like as if it doesn't have enough power. The car doesn't make the sound when idle or when placed into neutral while rolling.

Car is making a noise Inspection $94.99 - $114.99 Get a Quote

Hi there. If the humming sound is coming from your vehicle while it’s in gear, then the likely source is the transmission. It is possible that CV joints or wheel bearings might also be the source of your problem, but those typically make noise all the time. It would probably be a good idea to have a professional mobile mechanic come to your location to complete a car is making a noise inspection, so they can pinpoint the source of this issue and recommend the right repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I check and top off the windshield washer fluid?
Your windshield washer fluid serves a couple of purposes. Obviously, it helps keep your windshield clean and free of dirt and grime, but it also helps with deicing in the winter (as long as you’re using a winter formulation). Keeping...
P0421 comes up on scan. What is the likely culprit
Hello. When you get the P0421 code (https://www.yourmechanic.com/article/p0421-obd-ii-trouble-code-warm-up-catalyst-efficiency-below-threshold-bank-1-by-andrew-quinn), it usually means that you have a failing catalytic converter (https://www.yourmechanic.com/services/catalytic-converter-replacement). It is very common for converters to fail on this vehicle over time. Most of the time I use a scan...
Good bulbs, good fuses, only middle brake light working, 2001 Honda Civic
Hi there. If only the high mounted light in the middle works, then there is a problem with the wiring to the rear lights. This is assuming that the bulbs are good. If the bulbs are fine then I usually...
I replaced all pads and rotors. There is pulsating /grinding noise when I brake. Is it a reluctor ring or sensor?
Pull the fuse for the ABS system (https://www.yourmechanic.com/services/abs-light-is-on-inspection) to disable it and then test drive the car (don't forget to re-install the fuse later). If the pulsating/grinding noise remains that means the ABS system has nothing to do with your...
Are drum breaks good?
Drum brakes have been around for a long time and were used before caliper disc brakes came out. There are still may drum brake designs used today and will perform great if the vehicle is designed to have them. I...
I have lowered my VW T5 van and there is a knocking noise coming from somewhere. Can you help in telling me what could be causing
Hi there. Depending on how you lowered your VW and if the knocking sound occurred right after this process was completed would factor in what might be causing the noise. Altering factory suspension is never recommended; as it typically creates...
Rear brake job
Hello, thank you for writing in. These situations are understandably questionable. The service providers at a lot of common oil changing and tire repair centers will quote you for a variety of things that can be updated. This does not...
When should I replace the timing belt on my 2006 Lexus ES330
Hi there. Lexus recommends replacing the timing belt at 90,000 to 100,000 miles. It appears as if you're vehicle is due to have this service completed, so if you'd like an estimate to have a professional mobile mechanic complete the...
The left side of my car has no power. driver's door and passenger door wont open.
It sounds like you may have some pinched wires or an electrical problem (https://www.yourmechanic.com/services/electrical-components-are-not-working-inspection) with the wiring running through the doors to the drive's side of the vehicle. As you may know, there are wires that run through the doors...

Related articles

A Buyer's Guide to the 2012 Mazda CX-9
If If you’re having a hard time picking between a luxury sedan and an SUV, the 2012 Mazda CX-9 is definitely worth a look. It has the exterior of a mid-size SUV, but inside, you’ll find a world of luxury...
A Buyer's Guide to the 2012 Mazda CX-7
If If you want an SUV, but don’t care as much about the “utility” part as you do the “sport” features, you should take a look at what the 2012 Mazda CX-7 has to offer. Key Features With a turbo...
The Best Used Cars to Buy If You’re an Architect
Obviously, Obviously, architects appreciate beauty and symmetry. This is not just the case when it comes to their building projects, but also in terms of the vehicles they choose. We have evaluated several used cars, and identified the Mercedes CLA,...