humming noise

[cavx5]

hi everyone..just noticed this today..2005 4.4 with 17k..there is a slight humming/buzzing noise coming from the dash..i think..i think i also hear it in the back near the left rear wheel...but anyway it is a constant very low pitch electrical type noise and it ceases when car is shut off and commences when car is started..any inputs/opinions..i dont know if it is a hvac noise or something else...thanks rob

[scotchic]

Does it change when fans turned up/down/off?
Could just need a clean.

[cavx5]

no it remains constant only time it shuts off is when you shut car off

[scotchic]

Sorry! No idea then.

Rethink: Tinitus/radio amplifier at left rear wheel or as you mention in the repost fuel pump or hedgehog/fsr.

[ZsX5o3]

could it be a wheel bearing? are you hearing it when the car is stopped?

[cavx5]

i have a buzzing/electrical noise in the cabin..it occurs when vehicle is started and ceases when you shut off..it is a faint constant noise...you also hear buzzing noise on outside of vehicle in the rear..by left rear tire and back bumper area...i had 1/4 tank of gas i thought maybe it was the fuel pump..i put in gas to 3/4 and noise is still present...could it be fuel pump on the way out..i have no other issues...what do you think...thanks rob

[nra0707]

I have a similar, if not the same, humming noise in my dash. I think it has to do with climate controls. If I shut my fan off, the humming stops. I haven't researched it further and since everything still works, I'm not going to mess with it. Maybe next time when I bring my X to the stealer, I will get it checked out.

[aak]

If you find it is only coming from the dashboard check out the post by fatboyoz about this issue.

http://www.xoutpost.com/x5-e53-forum/...ngine-off.html

Those two little vents in the climate control area have a sensor behind them which lets the climate control system know what the cabin temperature is so that the correct temperature air can be blown in to the car. There is a little fan back there that sucks the air in to the vents and over the sensor. The noise you are hearing may be that fan - in my case because it is a clicking/ticking/electrical noise it may be that the fan is broken or inhibited from spinning freely due to dust/gunk.

Actually in my case the noise is always there - even when the key is not in the car. So, I'm going to change the final stage resistor in the hope that this will cure the problem.

[DutchieX5]

Hello,

My X5 4.6is is making the same noise from the dash. Looks like it is coming from a fan. Try this: Set the airco as low as possible (16 degrees celcius in Europe), the fan stops spinning then and the noise is gone.

I will have to find the exact fan, but don't want to disable my dashboard yet.. Does anyone knows where the fans are located. The one that's making the noise is located behind the instrument cluster is guess...

Greetz,
Niels

[aak]

Niels - check the link I posted in my last post. It will show you where the fan is and if you read the last posts it will show you how to get at it too.

aak