Rep Power: 0

My 03 EX set an O2 sensor code the other day and I'm wanting to put in a new one but I'm unsure which brand is best. I'm new to the Civic world and I've heard they are sensitive to O2 sensors so I would rather not spend money on one that turns out to be junk.
BTW, the car has a small head gasket leak (exhaust gasses in the coolant) and is going in tomorow for that and the timing belt/water pump replacement. Should I wait to see if the code goes away after I get the car back or am I to assume it will need replacement?

Thanks!

 
Rep Power: 0

Also, my mpgs have been around 22-23 for a while in mostly city conditions- 29-30 on the highway. I really baby this car..it rarely sees 3k rpms and I coast as much as possible, so I'm inclined to believe my O2 is actually at fault. Any chance the head gasket could be effecting my mileage?

 
Rep Power: 201

i threw an Denso direct OEM replacement in mine. I know for a fact, however, that the 04/05 air/fuel sensors are different from the 01-03 oxygen sensors. More expensive too so you'll be lucky there lol.

Go here, direct replacements, cheap prices:

http://www.rockauto.com/catalog/raframecatalog.php

 
Rep Power: 353

go to autozone and get a bosch or denso direct replacement.

 
Rep Power: 812

i bought cheap bosch sensors for mine and turned out they were actually NTK inside which is the oem brand honda uses. havent had any problems for a few yrs now.

 
Rep Power: 0

Bosch it is! Now I'm just waiting to get her back from the dealer...

Thanks for the advise guys!