Ok, can anyone tell me that name of this one?

I believe it is about 8-10 years old. Sounds like a Breeders song maybe, simliar in production style to the Yeah Yeah Yeahs, but slightly less raw. It is sort of a faster, upbeat rock song, elements of which are surely produced electronically.

It has a female singing, with slight distortion. The main verse ends with the music fading away as the chick says "a reaction is made" with the emphasis on and micro-pause after the "ACK" syllable in "reaction."

It was on some car commercial (nissan? mazda?) about 2 years ago, now I just heard it at the gym yesterday and seriously want to find it. I don't think that its an unknown song by any means, so surely someone will know it off the top of their head.

PLEASE HELP!!!

for any who were staying up nights on this one its

Elastica - Connection

and my lyrics were wrong... connection, not reaction