Well I'm finally ready to replace my knock sensor - its driving me crazy knowing that I have untapped power in my car.
What's the best online store to buy Knock Sensors? The cheapest and most reliable?

 

there are people on ebay that sell sensors for about $85 shipped, check that out first, i bought one 2 months ago, was shipped quick, OEM sensor

 

this guy on ebay has them most of the time..very reliable...and only $90
http://cgi.ebay.com/ebaymotors/ws/e...item=2462904830

 

check out www.jerryromenissan.com. I hear that he gives a good discount for .org members if you mention when you call. I think that would be a good bet.

 

I bought a slightly used ks on ebay for $50 shipped a few days ago. I'll know if it works this weekend

 

i just replaced mine today, and some words of advice. buy the harness that goes with it. its a short harness about 20.00 dollars at nissan.
but they say that goes bad as well and is worth changing st the same time. it took me 30 mins by going inbetween with a wrench. tested the car today and what a better response you get. i didnt know it made such a difference.

 

what is general rule of thumb to replace knock sensor? for example how many miles car must be driven for knock sensor to go bad?

Thanks!

 

seems to be around 100,000 miles

 

Cheapest I can find is around 120-130$ for Knock Sensors not on Ebay. How trustworthy are these Ebay auto-part sales?

 

i paid 131.00 at nissan and 20 dollars for the harness that connects to it.
this is the first time changing it with 120,000 miles..

 

When you speak of the harness that connects to it, do you mean the electrical socket it fits into? I havent looked down there in the engine yet, so I'm not sure what I'd be looking for to find a broken harness.

 

when I open the hood and looking at engine bay, where it is exactly located?

Thanks!

 

its located under the throttle body in that cave under the manifold.
like in the middle of the v. the cable thats attached to the sensor is the
one you change. just pull it out with the sensor it disconnects at the other end maybe about 6-8 in long. when i took mine out it was hard and flexed and corroded tips,only 20.00 change it.