Low level humming noise coming from engine bay when car is off???

STC · 01-09-2011, 11:50 PM

I got home an hr ago and parked the car in the garage. Im sitting in the garage cleaning my shoes when I notice a low level humming coming from the engine. It would last maybe 3-5 secs, and it happened every 5 mins or so.
I have an 08 335i Sedan w/ iDrive.

What is that noise? ANyone else experience this?

XieJin · 01-10-2011, 12:25 AM

I've heard the noise but only after shutting off the car, then sitting in it for a few min. it would start after roughly 1-2min and last around 5 sec. After this it would not make the noise anymore. I'm assuming the car closes something so that dirt/whatever can't get in while its off? either that or its a hidden antennae

fdriller9 · 01-10-2011, 12:43 AM

I think it's the fan....pop your hood next time and look at the radiator fan

J02 335i · 01-10-2011, 05:14 AM

Its the electric water pump cooling things down.

Potty_Pants · 01-10-2011, 05:28 AM

I think there's a bee's nest or rodent living in my wife's night stand.

Every once and awhile I'll hear buzz buzz noise comming from wife's night stand.

The more i think about it im going to tell her about it tonight and I'll kill whatever's in there.

Better safe then sorry.

ppp

jaza45 · 01-10-2011, 06:49 AM

It's the Water pump

MusclezMarinara · 01-10-2011, 08:32 AM

Quote:

Originally Posted by ******

It's the Water pump

2kaccordocoupe · 01-10-2011, 09:02 AM

Quote:

Originally Posted by J02 335i

Its the electric water pump cooling things down.

+1

CptJack · 01-10-2011, 11:50 AM

My new (to me) 07 335xi makes all sorts of noises I'm not used to. There's the water pump noise you refer to, but there's also some sort of whirring when I do something like open the door later on to get something out of the car (I don't keep it locked in the garage). I haven't spent much time investigating it, though.

STC · 01-10-2011, 12:10 PM

Quote:

Originally Posted by CptJack

My new (to me) 07 335xi makes all sorts of noises I'm not used to. There's the water pump noise you refer to, but there's also some sort of whirring when I do something like open the door later on to get something out of the car (I don't keep it locked in the garage). I haven't spent much time investigating it, though.

Ive heard that noise too. I thought was the DVD drive cause it sounds like a DVD spinning. Someone prob knows.

jgerv · 01-10-2011, 12:27 PM

That's your fuel pump priming. Its activated by opening your door or by unlocking with the key fob. Supposedly its suppose to cure the hpfp problem.

01-09-2011, 11:50 PM	#1
STC First Lieutenant 40 Rep 323 Posts Drives: 2011 E90 M3 Join Date: Jan 2011 Location: Bay Area, CA iTrader: (0)	Low level humming noise coming from engine bay when car is off??? I got home an hr ago and parked the car in the garage. Im sitting in the garage cleaning my shoes when I notice a low level humming coming from the engine. It would last maybe 3-5 secs, and it happened every 5 mins or so. I have an 08 335i Sedan w/ iDrive. What is that noise? ANyone else experience this?
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01-10-2011, 12:25 AM	#2
XieJin Private First Class 10 Rep 197 Posts Drives: '15 M235i xDrive Join Date: Jan 2011 Location: Sweden iTrader: (0)	I've heard the noise but only after shutting off the car, then sitting in it for a few min. it would start after roughly 1-2min and last around 5 sec. After this it would not make the noise anymore. I'm assuming the car closes something so that dirt/whatever can't get in while its off? either that or its a hidden antennae Last edited by XieJin; 01-10-2011 at 12:30 AM..
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01-10-2011, 12:43 AM	#3
fdriller9 Banned 253 Rep 7,089 Posts Drives: '06 AW 330xi Join Date: Mar 2009 Location: North Jersey/Philly/NYC iTrader: (4) Garage List 2006 330xi [6.44]	I think it's the fan....pop your hood next time and look at the radiator fan
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01-10-2011, 05:14 AM	#4
J02 335i Lieutenant Colonel 39 Rep 1,558 Posts Drives: F80 M3 Join Date: Aug 2010 Location: Ontario iTrader: (1)	Its the electric water pump cooling things down. __________________ Sport pack, JB3, Dci, factory oil cooler, 18" M3 reps, Michelin PSS, painted trim, black grills, smoked side markers, LED plate lights, H&R coils, Borla catback
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01-10-2011, 05:28 AM	#5
Potty_Pants Colonel 66 Rep 2,189 Posts Drives: 2012 Genesis Sedan Rspec Join Date: Apr 2007 Location: Southern NJ iTrader: (0)	I think there's a bee's nest or rodent living in my wife's night stand. Every once and awhile I'll hear buzz buzz noise comming from wife's night stand. The more i think about it im going to tell her about it tonight and I'll kill whatever's in there. Better safe then sorry. ppp __________________ Olds Starfire > Chevy Malibu > Isuzu I-mark RS & Honda Magna 500 > Grand Am GT & YSR50 > Nissan Maxima & Ninja 750 > X-Wife > Hyundai Excel > Honda Prelude > Honda Accord > Honda Prelude & Ninja 250> Infiniti G35 > E90 335i > Hyundai Genesis Rspec, Hyunadai Sonata > Kia Sorento > Honda CRV-EX
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01-10-2011, 06:49 AM	#6
jaza45 Banned 61 Rep 1,121 Posts Drives: 2008 LSB E90 335I Join Date: Nov 2008 Location: MIAMI iTrader: (14)	It's the Water pump
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01-10-2011, 11:50 AM	#9
CptJack New Member 0 Rep 10 Posts Drives: 2007 335xi Join Date: Jan 2011 Location: Kansas iTrader: (0)	My new (to me) 07 335xi makes all sorts of noises I'm not used to. There's the water pump noise you refer to, but there's also some sort of whirring when I do something like open the door later on to get something out of the car (I don't keep it locked in the garage). I haven't spent much time investigating it, though.
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01-10-2011, 12:27 PM	#11
jgerv boosted x 2 8 Rep 108 Posts Drives: 2007 BMW 335i Join Date: May 2010 Location: Winnipeg, Canada iTrader: (3)	That's your fuel pump priming. Its activated by opening your door or by unlocking with the key fob. Supposedly its suppose to cure the hpfp problem. __________________ 2007 TIAG 335i \|\| ZPP \|\| CA \|\| LOGIC 7 \|\| JB4 \|\| BMS DCI \|\| VMR V710 \|\| BMW PE EXHAUST \|\| M-TECH CF SPOILER \|\| BLACKLINES \|\| MTEC V3 AE \|\|
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