Vibration when entering car

flagger · 04-23-2011, 04:03 PM

Did a quick search, and didn't see anything.

When I get in the car, before starting, there is a very subtle vibration in the steering wheel, seat and start button. No noises. I would say it is some kind of motor, but nothing is moving. Key is same from prior use so the car is not readjusting to new key.

Anyone else experience? Any thoughts? I've had this since I bought the car in 2008 and just keep forgetting to ask.

sameh · 04-23-2011, 05:52 PM

Quote:

Originally Posted by flagger

Did a quick search, and didn't see anything.

When I get in the car, before starting, there is a very subtle vibration in the steering wheel, seat and start button. No noises. I would say it is some kind of motor, but nothing is moving. Key is same from prior use so the car is not readjusting to new key.

Anyone else experience? Any thoughts? I've had this since I bought the car in 2008 and just keep forgetting to ask.

It's haunted!!

haze gray · 04-23-2011, 05:59 PM

Seats or mirrors adjusting, CD Drive spinning up?

flagger · 04-23-2011, 06:09 PM

Quote:

Originally Posted by DrFerry

Perhaps it's the fuel pump which I think activates on the auxilary ignition circuit prior to starting the engine.

Kind of what I was thinking. I don't know when it is supposed to activate, but what you say makes sense. I do know nothing else is moving (i.e., mirrors, seats, etc.).

Thanks

flagger · 04-23-2011, 06:11 PM

Quote:

Originally Posted by haze gray

Seats or mirrors adjusting, CD Drive spinning up?

I know it's not the seats and mirrors, but your idea of the CD (navigation) spinning up might be a possibility; however, since it stops after about 4 seconds, I'm inclined to consider the fuel pump pressurizing the system prior to start up.

I do have the Comfort Access key, so the car is aware of the key's presence in my pocket.

Thanks

piloto · 04-23-2011, 09:04 PM

It's likely the fuel pump that is pressurizing the fuel line. It does that when you open the driver's door. Try opening the driver's door, wait for the sound, close it, and open it again and see if the noise happens again. If not, then it's the pump pressurizing the fuel system.

04-23-2011, 04:03 PM	#1
flagger Private First Class 18 Rep 150 Posts Drives: E92 M3 Join Date: Mar 2008 Location: West Virginia iTrader: (0)	Vibration when entering car Did a quick search, and didn't see anything. When I get in the car, before starting, there is a very subtle vibration in the steering wheel, seat and start button. No noises. I would say it is some kind of motor, but nothing is moving. Key is same from prior use so the car is not readjusting to new key. Anyone else experience? Any thoughts? I've had this since I bought the car in 2008 and just keep forgetting to ask.
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04-23-2011, 05:59 PM	#3
haze gray Second Lieutenant 5 Rep 264 Posts Drives: 2009 M3 Coupe / 2011 X5 Join Date: Feb 2009 Location: Northern Virginia iTrader: (0)	Seats or mirrors adjusting, CD Drive spinning up?
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04-23-2011, 09:04 PM	#6
piloto Captain 29 Rep 843 Posts Drives: 2011 E90 M3 - AW/FR Join Date: Jun 2010 Location: Orange County, CA iTrader: (0)	It's likely the fuel pump that is pressurizing the fuel line. It does that when you open the driver's door. Try opening the driver's door, wait for the sound, close it, and open it again and see if the noise happens again. If not, then it's the pump pressurizing the fuel system.
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