C5 - 2000 o2 sensor

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Oct 13, 2011 | 01:58 PM

snow6

Thread Starter

1st Gear

Joined: Jun 2009

Posts: 11

C5 - 2000 o2 sensor

Hello ,

I am about to order O2 sensors for my 2000 A6 Quattro 2.8. I found two types of O2 sensors in Amazon. Both seems to fit , just one if them is some more cheaper. Any suggestions on which to buy? Thanks

http://www.amazon.com/Bosch-16287-Ox...dp/B000BZI4U2/

http://www.amazon.com/Bosch-16067-Ox...dp/B000BZL0EO/

Oct 14, 2011 | 02:45 AM

FonzoB5S4

2nd Gear

Joined: May 2008

Posts: 951

From: Los Angeles, Ca

not sure but i think the green one is for the rear(exhaust) and the other is for one of the two in the front(engine). which 02 are you trying to replace?

Oct 14, 2011 | 04:11 AM

bigdadi

1st Gear

Joined: Sep 2010

Posts: 409

From: Boston MA

I think ...

Pre-cat one better be in OEM as it does more job (talk with MAF) than post-cat which can be the cheap one as it just provides data to compare with pre-cat O2, to tell if the cat is efficient enough.