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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > rattle in dashboard



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      02-02-2015, 02:29 PM   #1
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rattle in dashboard

So... I had slight rattle coming from the dashboard area. It was more dominant when the weather was below freezing and engine cold. Once engine would warm up, it would subside. After severe pressure from outside factors (GF doing this too many times - ), I took the car to the dealership. They quoted me $155 for diagnostics - price of being free.

Joking aside, 3 hours later (they had to let car cool off), SA tells me that mechanic found an issue and it has been fixed. Total cost ~$8.50 (including 30% discount).

Apparently, noise in these cars tends to travel - A LOT.

Noise was caused by one of the rubber bushing on the air-box which went bad. Airbox was vibrating and noise was traveling through the body and manifesting itself in the dashboard (this was weirdest shit I ever heard). So, simple $7.50 part later, my dash is rattle free. Weird thing was that if you open the hood and listen, you would never hear any noise coming from it.

To Eugene (mechanic) and the way you figured it out

PS. I was told that he witnessed many times issues where noise would appear to be coming from completely unrelated areas. i.e. sunroof rattle when cause was something lose in the trunk, etc.
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      02-10-2015, 08:37 PM   #2
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By the airbox do you mean the place the air filter is. Can you send out the part number for the part they replaced?
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      02-10-2015, 09:49 PM   #3
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Had a similar issue in my 330i. I would only hear it at idle, or if the a/c was on. I actually had a washer in the airbox.
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      02-10-2015, 09:55 PM   #4
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Wish someone would track my dash rattle down with the same determination
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      02-10-2015, 09:58 PM   #5
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Part number listed on invoice is 13-71-7-539-903
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      02-10-2015, 10:00 PM   #6
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Please post a picture! I've had a rattle in "center of dashboard" for years...
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      02-10-2015, 10:04 PM   #7
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Quote:
Originally Posted by Dark_Knight_335 View Post
Wish someone would track my dash rattle down with the same determination
Can you describe it?
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      02-10-2015, 10:09 PM   #8
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Quote:
Originally Posted by xxxjecxxx View Post
Please post a picture! I've had a rattle in "center of dashboard" for years...
I will take a pic tomorrow. Can you describe it?
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      02-10-2015, 10:11 PM   #9
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Quote:
Originally Posted by W37V View Post
Part number listed on invoice is 13-71-7-539-903
Looks like part 9 in this link:
http://www.etk.cc/bmw/EN/search/sele...YS/13/13_1147/

Its the rubber boot the filter box rests on.
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      02-10-2015, 10:13 PM   #10
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This post also covered the part

http://www.e90post.com/forums/showthread.php?t=367573
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      02-10-2015, 10:19 PM   #11
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Quote:
Originally Posted by W37V View Post
Can you describe it?




What makes matters worse is it only seems to happen once the car is fully warmed up, no matter if the climate system is on or not. Strange as it seems, it seems to be magnified in the rain.

Seems to happen when revving at idle between 1k and 2k RPM, and when slowing down to a stop (again RPM related). Sounds blower or fan related. MAYBE ECU fan related? NO IDEA! No dealer can "reproduce" it, despite a video like this. I've all but given up hope...it sounds like shit, and I fear at the time of selling the car, someone will hear it and be like WTF...
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      02-10-2015, 10:24 PM   #12
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Quote:
Originally Posted by Dark_Knight_335 View Post
Wish someone would track my dash rattle down with the same determination
DK, in your case, it's the left hand bushing on the rear of the airbox. Same part number, different location. Either that or the left-handed knurldurner.
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      02-10-2015, 10:26 PM   #13
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God I hope you're right. I'm shocked no damn dealer can nail it. They can fix all the rattles in my car but that one...

HOPING it's not the right hand jerkin-gherkin....
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      02-10-2015, 10:52 PM   #14
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I guess at that rpm range oscillations are just strong enough for issue to manifest themself. Is the noise up top of the dash? I know this was probably done, but see if you remove ac filter and overlaying plastic and see if it still happens. see if anything is rubbing on the firewall. If you suspect a fan, see if there is any (even slight) evidence of parts rubbing. During my reasarch I found a bunch of things causing dash rattle. (Engine cover not mounted properly, heat shield lose, improperly installed plastic in the engine bay, muffler mount lose, driveshaft issues etc)

Also, try and see if you are having possible same issue as I did. Box vibrating and hitting body causing noise to travel. What he did in my case, was to throw the car in gear and drop the clutch causing the car to almost stall. That caused the box to vibrate and reveal itself as an issue.

Have you removed the speaker grille and looked in there for obvious issues?

I'm not an expert and this, but those were things that come to mind ( probably dumb anyways)

However, if you have no luck yourself and you come to DC area, I recommend my mechanic. I think they charge $155 diagnosis fee, but the guy is really good with rattles and squeaks.
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      02-10-2015, 11:38 PM   #15
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Not at all man, and I'm appreciative of every single sentence- you don't understand... it's been driving me crazy for the last year and a half, and I'm willing to try just about anything to solve it.

I mean hell...some of the suggestions that I proposed are probably pretty stupid if anything
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      02-19-2015, 02:10 PM   #16
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Quote:
Originally Posted by W37V View Post
I will take a pic tomorrow. Can you describe it?
Just an update:

No pictures until it warms up. The part is on the lower part of the air box and is not accessible without removal of the box. Sorry...
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      02-19-2015, 04:55 PM   #17
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Quote:
Originally Posted by W37V
I guess at that rpm range oscillations are just strong enough for issue to manifest themself. Is the noise up top of the dash? I know this was probably done, but see if you remove ac filter and overlaying plastic and see if it still happens. see if anything is rubbing on the firewall. If you suspect a fan, see if there is any (even slight) evidence of parts rubbing. During my reasarch I found a bunch of things causing dash rattle. (Engine cover not mounted properly, heat shield lose, improperly installed plastic in the engine bay, muffler mount lose, driveshaft issues etc)

Also, try and see if you are having possible same issue as I did. Box vibrating and hitting body causing noise to travel. What he did in my case, was to throw the car in gear and drop the clutch causing the car to almost stall. That caused the box to vibrate and reveal itself as an issue.

Have you removed the speaker grille and looked in there for obvious issues?

I'm not an expert and this, but those were things that come to mind ( probably dumb anyways)

However, if you have no luck yourself and you come to DC area, I recommend my mechanic. I think they charge $155 diagnosis fee, but the guy is really good with rattles and squeaks.
I'm willing to travel for that, but could not leave the car. I'll take another chance with Morristown- they're a damn close second.
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      02-19-2015, 09:44 PM   #18
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Quote:
Originally Posted by Dark_Knight_335 View Post
Wish someone would track my dash rattle down with the same determination
Seriously.
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