So my dads 99 Accord 2.3 needs a new knock sensor. my dad doesn't care about the car enough to buy it at the dealer but I found one on ebay which the seller claims is a oem one: http://www.ebay.com/itm/160992527484...84.m1438.l2649 Any thoughts??

 

They seem like a low volume dealer so not much feedback but the price is very right if that's the real dealer price. I can also tell you that eBay will charge them back if there's a problem so it's worth the gamble.

I don't know if a bone yard would part with one unless off dead engine. If you go aftermarket stick with OEM brand like Denso.

 

Seems decent to me. I usually make a video when I open the package that someone sends me on ebay as a backup just in case.