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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum Weird start up noise during cold start
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      06-24-2015, 11:48 AM   #1
jas877
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Weird start up noise during cold start

I have noticed that when I don't drive the car in about 2 days+, it makes a weird noise but then goes away in about 3 mins. Is this normal ? The video is not to good to hear the sound but I hope it somewhat helps. Any feedback will be great. It is a 2012 535, thanks !

Also can I post the video here through my phone? I am trying but can only add pics.
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      06-25-2015, 06:45 PM   #2
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post it on youtube
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      06-25-2015, 09:43 PM   #3
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Awaiting upload
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      06-26-2015, 12:23 AM   #4
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Video loaded



Thanks for the advice! I uploaded it and hope this link helps. You can barely hear the noise but it sounds so weird. Tmmr morning I will try to turn it on before work just so I can get a better video (note car has not been driven since last Saturday) only turned on for the original video for less than a min a few days ago
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      06-26-2015, 06:27 AM   #5
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Better video



Like I said earlier I am not sure if it is normal. I think this video is better for hearing the noise and as you see after a few secs the noise drops a lot
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      06-26-2015, 10:35 AM   #6
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My E46 used to do this on a very cold start or after sitting for a while such as over the weekend. Eventually led to a check engine light. Codes pointed to a faulty CO2 Lambda Sensor. After further investigation turned out to be a faulty/worn coil. Hope this helps. Having listened to the rough idle ... I would be strongly inclined to investigate this route.
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      06-26-2015, 11:29 AM   #7
jas877
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Awesome thanks a lot bro appreciate the feedback
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      07-01-2015, 05:40 PM   #8
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Quote:
Originally Posted by jas877 View Post
Awesome thanks a lot bro appreciate the feedback
Your welcome brother. Let us know how things pan out
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      07-06-2015, 09:27 AM   #9
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Yeah.., same noise as my 528i... Took the BMW and they found 2 failed coils... Wanted to replace all of them as each would be nearing the same point, as we as, the spark plugs for all cylinders too. Be careful... Have it checked now!
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      07-06-2015, 08:43 PM   #10
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Thanks so much for the advice. I will definitely have it checked out asap!. Do you know if by any chance it was covered under the warranty ?
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      07-08-2015, 03:56 PM   #11
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UPDATEE

So car went in yesterday morning for this problem and I told them not to turn it on until today because that is when they will hear it. (coldstart)

They called me just now saying that the problem is "solved, noise is gone" (have to hear it to believe it) and that they ended up replacing "the Belt tensioner and the Bolt" whatever that means haha. Will pick up the car tmmr morning
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