Rectangular piece sitting to the right of the seat pivot point.

 

Does it have a part number on it?

 

Fbi tracking devise!! Jk!!

 

Try zooming in.....the pic from like 20 feet away is not too useful...

 

your wrong - it's a drone homing device

 

Looks like one of the antennas for the Comfort Access system:

http://realoem.com/bmw/showparts.do?...98&hg=61&fg=25

 

Ah yes, that appears to be in. #4 on the diagram. Thanks!

 

hey does that thing make a noise? Can you hear it? I just ripped out my rear seats a few days back so that piece is exposed. Today while I was driving I noticed a faint electronic sounding hum coming from somewhere in the back. I just couldn't put my finger on what it was. I'll investigate more tomorrow...

 

I dont think so, havent noticed anything over the road noise and fuel pump.

 

ahhh...fuel pump. duh- that's probably it.