Please ID this plug. On Firewall harness in a '91 318is

[BrewCity11]

Posting this for my brother. Pic sent from his iphone. Thanks

[BrewCity11]

Searched around the M42 site and looks like its a harness only for non-cat cars and should be left unplugged. Wierd, huh?

[Hick]

yup. i plugged mine in once, made it run like crap. pretty fun!

[ethree]

I think the iphone should take better pictures than that. I have 2.0 mega pixel and they look as good as that pic wtf?

[tjts1]

Old school factory Ipod connectivity. The German's thought of everything.

[stevofthahill]

I'm a fucking idiot, because when my fuel pump went out, I was double checking relays etc, and I noticed this plug unplugged, and on an impulse...I plugged it back in. Now, when I start my car, sometimes I have a rough idle for about 30 secs and then it goes away. I thought I did something wrong, but it all makes sense now...

I just doublefacepalmed myself.