My car is 2001 accord LX, and the engine is F23A4 with ULEV. I am looking for an FRONT O2 sensor. Someone suggested to get DENSO, but its products are really confusing. The one with part# 2344122 looks suitable for my car and good in price. It is confusing that many websites say this is FRONT O2 sensor but the DENSO tech says that it is for REAR.

Can anybody help me to check out whether it is good for my car? Anyother suggestions, or other brand(bosch...)?

Thanks a lot!

 

Try http://www.sparkplugs.com and they have a search function and it'll tell which is the right one. And they have really good prices.

 

The front is an Air/Fuel sensor, similar to an O2 sensor, but slightly different in material. The front sensor Denso is part # 234-9014 for $179.04 at sparkplugs.com.

The rear O2 sensor is DENSO part # 234-4122 is $33.82.

10% discount code at sparkplugs.com for NGK or Denso O2 sensor is srto2.

 

Damn - ULEV is expensive.

 

Thx.
I got the same info from the sparkplug.com. However, some others such as http://www.carpartswholesale.c...O&x=1

sell this as a Front O2 sensor. I even talked to the tech in this website, and he guaranteed that this is for FRONT, which confused me so much.

BTW, is there a major difference between front and rear, since both O2 sensors give signals of 0.1 or 0.9?

 

if I put a rear one in before catalytic converter, will it work properly?

 

The before is the main important one.
The after just makes sure that the reading of the front match whats
programmed in the ecu.
If the reading don't match then the cel is triggered.
If you have idling problems and the cel is for the o2, then the front is causing the idle troubles.