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Old 07-13-2015, 01:42 PM   #1
joshua_15wrx
Scooby Newbie
 
Member#: 411847
Join Date: Jan 2015
Chapter/Region: MWSOC
Vehicle:
2015 WRX Premium
WR Blue

Default Vibration under driver's side tweeter

Hi all! I have a 2015 WRX, 6MT, Premium trim. A few weeks ago I started noticing a very annoying rattling sound under the dash tweeter on the driver's side. Sounds like something tapping against a hard plastic. It is only noticeable when the car is vibrating slightly and constantly. For example, when cruising on semi rough pavement at 50 mph. Another example would be if I'm in 2nd go up to around 4,500 RPMs, release the accelerator and let the car cruise... So far I have removed the tweeter and its cover, and the plastic trim covering the fusebox which contains the button to open the trunk. I haven't been able to pinpoint it... It still does it without those parts. Once you notice it you can't un-hear it. Has any of you experienced this? Any ideas? I'm extremely frustrated!!! This is a 30K brand new car!!! Thanks in advance for your help!
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Old 07-14-2015, 02:33 AM   #2
jnick66
Scooby Newbie
 
Member#: 424476
Join Date: Jun 2015
Location: Sacramento, CA
Vehicle:
2015 WRX CVT
DGM

Default Same here

I also have a 15 wrx and have the same rattle. If I push on the dash right above the driver side air vent it stops rattling. Only does it every once in a while so I haven't been able to pinpoint it either. But I think it's right above the vent for me.
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Old 07-14-2015, 10:50 AM   #3
RobM
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Member#: 177056
Join Date: Apr 2008
Location: Alberta, Canada
Vehicle:
2015 WRX - CVT
2009 Forester XT

Default

Mine rattles there only occasionally. If I shove my fingers between the door trim and dash trim, as high as possible, it stops rattling. Since it only rattles every other week, it hasn't reached the annoyance stage, (yet).
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Old 07-14-2015, 03:16 PM   #4
joshua_15wrx
Scooby Newbie
 
Member#: 411847
Join Date: Jan 2015
Chapter/Region: MWSOC
Vehicle:
2015 WRX Premium
WR Blue

Default

FIXED IT!

Long story short... I removed the A/C small vent on the top part of the dash. Seems like the vibration was coming from the duct behind the vent vibrating against the dash.

This is what I did:

1) Remove the A/C small vent on the top of the dash using a plastic trim removal tool. Carefully insert the tool where indicated in the image below and pull upward.



2) Remove the combination meter a.k.a instrument cluster/panel. 2 screws for the trim, 4 screws on the actual cluster.





You will now have access to the full length of the air duct that leads to the vent earlier removed.

3) Re arranged the white insulating material such that it is pinched between the top part of the air duct and the dash.

4) Reassemble and DONE!!!

Seems simple, but I spent ~4 hours on this and practically disassembled the dash until I found the source and fixed it.

On a related note, there are multiple parts under the dash that are loosely fastened to each other and rattle by themselves. My advise is to fasten them as well. Some of these are:
  1. Relay on top of the fuse box
  2. Metal bracket holding the diagnostic port
  3. Hard plastic bracket that holds a control module (ECU maybe?) and bank of relays attached to it
  4. Small gray sensor/relay

I added mounting tape and/or tight-wraps to all of these. Now they're tight and firm.

My apologies for not taking pictures, it was getting dark and I was in a hurry to finish.

Hope this helps!!! Feel free to reach out with any questions.

Last edited by joshua_15wrx; 09-10-2015 at 01:08 PM.
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Old 07-14-2015, 07:13 PM   #5
quantum13
Scooby Specialist
 
Member#: 389143
Join Date: Apr 2014
Chapter/Region: TXIC
Location: DFW TEXAS
Vehicle:
2015 WRX Limited
DGM

Default

first pic not showing up for me. eager to try this though 4 hours in the Texas heat....not so much. Maybe i'l wait until Winter.
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Old 07-14-2015, 07:34 PM   #6
MORGSY
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Member#: 408655
Join Date: Dec 2014
Chapter/Region: SCIC
Location: Glendale
Vehicle:
15 WRX
DGM

Default

Thanks, I have the same rattle and its annoying. Will give this a try this weekend and see if this works for me
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