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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 03-16-2015, 01:56 PM   #1
LandandHome
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Join Date: Nov 2014
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My Ride: 2000 328i
Questions about locks

2000 328i. How do the door and truck locks work? Should I be able to manually unlock the doors without battery power? I currently cannot. Also, I cannot physically get my key into the truck lock. Should I be able to open the trunk manually without electric? Can I buy a new truck cylinder? Will it have to be a dealer piece sense it is associated with the key? Any input would be appreciated!
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Old 03-16-2015, 03:02 PM   #2
jfoj
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Quote:
Originally Posted by LandandHome View Post
2000 328i. How do the door and truck locks work? Should I be able to manually unlock the doors without battery power? I currently cannot. Also, I cannot physically get my key into the truck lock. Should I be able to open the trunk manually without electric? Can I buy a new truck cylinder? Will it have to be a dealer piece sense it is associated with the key? Any input would be appreciated!
Yes and yes.

Any of the keys for the car should be able to unlock the drivers door without power. BUT you need to understand that the key will need to be turned a bit beyond the normal "unlock" position when the battery is working. This also assumes the door lock link is not broken connecting the drivers door lock cylinder to the door lock actuator. These are designed to be weak and can and will break. If the link breaks the key will move freely without much resistance.

As for opening the trunk, it will not open with a Valet key. The Valet key will not fit in the trunk or glove box lock cylinder.

Post a picture of the key you have for the car.
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Old 03-16-2015, 03:15 PM   #3
LandandHome
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I'm pretty sure the link is broken in my door. I need to replace the window motor assembly so when I am in there, I will check things out. Can I get a trunk key from the dealer?
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Old 03-16-2015, 03:25 PM   #4
jfoj
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Originally Posted by LandandHome View Post
I'm pretty sure the link is broken in my door. I need to replace the window motor assembly so when I am in there, I will check things out. Can I get a trunk key from the dealer?
There is no such thing as a trunk key, there is a Master key/Keyfob and there may be a plastic Replacement/Service/Wallet key as well. Either of these keys will open the trunk,

Do you have a keyfob? Does your key have buttons on it?

Suggest you read this link - http://forum.e46fanatics.com/showthread.php?t=1008294

I recall in order to manually unlock the door, you have to turn the key counter clockwise to the stop at about 45 degrees, then turn it slightly further, with effort until the key as about 90 degrees from where you started to manually unlock the door.

Do not quote me on this as I rarely have to manually unlock the doors on my E46 or E39.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299

Last edited by jfoj; 03-16-2015 at 03:25 PM.
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Old 03-16-2015, 03:40 PM   #5
LandandHome
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That is a good thread. I only have the basic key, no fob. The reason this question even came about is today, my hood latch wire broke under the hood. My fan motor is stuck on so I have been plugging and unplugging it until the new one comes it. I didn't want to kill my battery while in class so I unhooked the battery but I do not want to lock myself out of the trunk. I just unhooked the battery and stuffed a sock in the trunk lid latch area so it will not lock when the battery is not plugged in. Well, this is really for another thread lol
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Old 03-16-2015, 10:18 PM   #6
scottjoh
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The service key will not go into the trunk or glove box locks. Only the master and spare keys work all the lock cylinders. The service key is more commonly known as the valet key. If the trunk lock cylinder key slot is vertical it can be unlocked electronically. If it's horizontal it can not be unlocked electronically. The keys that go into the glove box and trunk have a slot cut into the blade on the left edge (while holding the head with the blade pointing away from you). If you know someone with a milling machine you can cut the grove into the service key to make it work.

Last edited by scottjoh; 03-17-2015 at 05:38 PM.
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