After I took my Ford Focus 2011 to the dealership for a free oil change I noticed a subtle, low hum coming from the car when I hit speeds past 40mph. At first it sounded like the engine of a louder car driving near me so it took me a couple days to realize that it was actually my car making the nois…

Possibly an underbody plastic panel they failed to tighten down.

yep to above post you waited too long tho, minor things can become major if not addressed.

How would I check to see if that’s the case? If it’s a problem that doesn’t require too much skill then I’d like to fix the problem myself since I don’t really trust the dealership mechanics. Yeah, I knew I waited too long but it was difficult to find time to get my car out to the dealership during…

There are too many could be possibilities. If you are covered by a warranty, let the dealer fix it. Could be a bearing of some sort or another.

Does it rise in pitch as the speed of the car increases? If so it could be a wheel bearing. But I’m puzzled as to why it doesn’t start until 40 mph. Insightful may be right. The wind blowing through a loose panel can start it vibrating.

Food for thought . . . it could be a failing wheel bearing In that case, the dealer can’t be blamed

Whyen something like this happens it’s best to get back to the repair shop ASAP. Now they can claim that they didn’t hear anything after the oil change, and they will presume that it is not that important because you waited three weeks. If you could drive it onto some ramps, you might be able to w…

It doesn’t change in pitch when turning. In the range of 40mph-70mph it seems to sound all the same.

It’s sounding more & more like insightful may be right. The air flowing by the loose panel causes it to vibrate at its resonant frequency. Resonant frequencies tend to remain at a constant pitch regardless of varying wind speed.

Loud Humming From the Engine

Maintenance/Repairs

SteveC76 August 18, 2014, 5:10am 9

Wheel bearing sounds likely, does it get louder as you speed up or change in pitch when you turn. Both of those symptoms are common signs of a failed wheel bearing.

Steve

Topic		Replies	Views
Odd hum in '02 Focus Maintenance/Repairs	3	519	February 21, 2008
Humming noise - only in right hand curves Maintenance/Repairs ford , focus	8	74583	November 23, 2009
2007 Mazda CX-9 hums Maintenance/Repairs	3	416	August 23, 2023
Humming sound at higher speeds - 2010 Cobalt Maintenance/Repairs	8	6259	July 7, 2016
2002 Tahoe Humming front end Maintenance/Repairs chevrolet , tahoe	3	835	May 6, 2013

Loud Humming From the Engine

Related topics