I'm looking to install an OEM alarm into my M3 4/5. A friend has a alarm box but i'm not sure if it's the correct unit for my car. Can anyone tell me what is the part # that I need to get.

Thanks in advance

green plug.

Thats not much help

green plug on unit.
what did the alarm box come out of?
there are a lot of alarm #s - why dont you get the one off of the unit, and then check it against the ETK. you're doing this backwards, and p

Ok here is the # on the box my friend has 82111496445.
What is ETK?