not ONE person in all his feedback say it worked...
they only talk about his "fast" shipping (which is kinda what you want to know about ebay sellers) not if the product they bought worked or not.
THEN there are a few who do say "Didnt work, scam, ****, blah blah..." and this guy has the same response for all of them... "you got what my auction said you would, (product wise) and if it didnt work for you, you installed it wrong."
A handfull of people who apparently did try to use it, say it makes the check engine light come on and some said it fried some hard core sensors that cost $$$ to fix. (ofcourse seller says it is their fault)
basicly its a $.99 resister from radio shack and some instructions where to install it. thats really all the auction says aswell. he is walking the VERY FINE line....
my opinion, SCAM not worth the risk