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      02-08-2015, 12:44 AM   #1
FlyCathayBMW
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Replacing hood open/close sensor

Today, I was driving on freeway and the warning light for hood open suddenly on. Did some research online and apparently it is not an uncommon problem.

I managed to found the sensor under the hood on the driver side, but before I try to pull it out and replace it, I wanna to know if there is anyone had done it or any tutorial available? I just want to play it safe. (warranty expired so better to do it my own I guess )
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      04-28-2015, 07:18 PM   #2
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Did anyone ever get back to you on this? I recently had both my hood locks changed and I'm getting a very constant "Hood Open" warning every time I drive, its almost insufferable.

Can anyone confirm where the sensor for this thing is? or is it a wiring issue?
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      04-28-2015, 09:37 PM   #3
7499rich
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Sensor looks like a button, removed mine when I installed bms cowl filters. Can't remember which side but 75% sure it's on drivers up in front of windshield.

I would find it and if it's failing cut it off and solder the wires together (assuming there are only two) and this would bypass it. Or you could replace if you want it...

Mine has a tywrap holding it closed as it does not have a home anymore since the cowl filter cowling has been removed.
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      04-28-2015, 09:40 PM   #4
GRUESOM3
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instead of hacking up wires and soldering you could also install a resistor into the plug and just tape it up. Just have to know what ohm resistor to put
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      04-28-2015, 10:00 PM   #5
7499rich
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Quote:
Originally Posted by GRUESOM3 View Post
instead of hacking up wires and soldering you could also install a resistor into the plug and just tape it up. Just have to know what ohm resistor to put
If your going to put something in the plug just use a jumper wire, the switch is just a dry contact which is a short circuit when the hood is closed.

If the switch is bad and has its own lead prior to the car side connector then not a big deal to cut the switch itself off so you have a connector with flying leads you can jump out.

Either way will work
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      04-29-2015, 01:25 AM   #6
bsiciliano
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I installed an aftermarket hood and it kept triggering my sensor and giving me a hood open warning. I fixed it for $0.12 by taping it down.

The sensor is on the driver's side.
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      04-29-2015, 01:49 PM   #7
a.wang
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Appreciate the response guys. Replacement part should be like 12 bucks or something, clip looks broken so its just moving about when driving.
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