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      03-10-2012, 04:55 PM   #1
jjanthony
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Mystery wiring harness, left side near cabin air

Hi...recently sold my 2003 M5 and bought a 2007 335i coupe. Had the hood up today about to do the LED angel eye upgrade and noticed a dangling wiring harness on the drivers side close next to the cabin air filter housing. The harness isn't attached to anything and is coming out of a 6" x 6" box of some sort that may be the car alarm. Can you take a look at the photos attached and tell me what the heck it goes to?

Thanks!

John
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Last edited by jjanthony; 03-10-2012 at 04:57 PM. Reason: typo
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      03-10-2012, 05:06 PM   #2
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That clips onto the cowl.
Look up procede install video and youll see him remove that at the beginining o the video. Theres 2 sensors, one on each side of the cowl.
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      03-10-2012, 05:10 PM   #3
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Originally Posted by Beemw335 View Post
That clips onto the cowl.
Look up procede install video and youll see him remove that at the beginining o the video. Theres 2 sensors, one on each side of the cowl.
What are they for cuz I'm driving around without my cowl lol and they are just hanging in my engine bay!
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      03-10-2012, 05:36 PM   #4
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That would be for the hood alarm sensor.
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      03-10-2012, 08:20 PM   #5
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Mystery solved.

Thanks everyone!
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      03-11-2012, 04:07 PM   #6
Juiced46
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Driver side is the hood alarm sensor. Cars with no alarm just have a dummy plug.
Passenger side is the fresh air sensor for when you have it in Auto Recirculation mode. Monitors outside air for pollutants and adjusts fresh air doors as needed.
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      03-11-2012, 04:56 PM   #7
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OP, I think you should put your cowl back on, it helps with water drainage when it rains outside..
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      01-27-2013, 07:32 PM   #8
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Bump....

Does anyone have any pics of how these look when installed properly?
Mine are just laying there.

07 328i sedan

Edit: Thanks. I found the video referenced above and found what I needed.

Last edited by Bitterpil; 01-27-2013 at 07:41 PM.
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