Can someone tell me what sensor is just to the right of the oil cap?
 

Frikken mice at the wiring to the sensor, but I caught it in time and repaired it before it broke completely. Can anyone tell me what sensor it is, in case it fails and I need to get a new one?

do you mean the solenoid? That is to the oem catch can.

http://normalexception.net/images/Ui...713_190030.jpg

The one in this picture?

That should be the purge solenoid valve

Related failure post
http://www.google.ca/url?sa=t&rct=j&...sd0MQrjsXVckJQ

http://img236.imageshack.us/img236/6885/dsc00374ut2.jpg

OEM catch can? are you referring to the accordion intake tube? lol

negative, catch can is integrated under the UIM on the S2. Or at least what the service manual refers to as a catch can lol, DarkBrew is right though, Purge solenoid

ah... and he's "Driving a black R3"... OEM catch can for $1000, Alex

That's it, thanks. :)

I should have mentioned my model and specs. n00b move on my part. :)

nah dude... I should've read below your nick and above your avatar :)

I'm going to see if I can trace the wire and replace it. Anyone know the part number? I'm looking for it, but I don't know what it's called exactly. :(

EDIT: Nevermind, I see paimon's pic. I should read better myself. :)