I have a 2000 civic lx and I have some nasty ebay headers on it. I am going to be buying a stock exhaust manifold tonight and I need to buy the downstream o2 sensor(after the cat). I was wondering if there was a difference in the upstream and the downstream or if they are pretty much universal. I can get the upstream for alot cheaper than the downstream so if they are the same it would be great.

 

bump

 

nevermind. I figured it out.

 

Well what did you figure out? just for future knowledge

 

They are the same. Just make sure your plugs are identical, or buy a universal and cut some wires.

 

Justz an FYI, I bought a new o2 sensor and it was bad out of the box lol, so don't dismiss that as a possibility if cel comes on after you put it on.