Headers, Intake, & Exhaust Custom Exhaust? New Headers? Need Opinions on Intakes? Discuss making your ride breathe better here.

O2 Sensor

Old 10-25-2011, 04:02 PM
New Member
Thread Starter
Join Date: Oct 2011
Location: Washington
Posts: 3
daveynicholson is on a distinguished road
Lightbulb O2 Sensor

I have a new catalytic converter on order and am just wondering how many of the O2 sensors I need to replace along with the CAT to get peak performance and also to make sure that I don't damage the new CAT.

After doing some research I found that usually it is the downstream sensor that goes faulty and needs replacing, but I also read that it is good to change all of them.

Is it really necessary to replace ALL of them, I only ask cause they are around 50 bucks a pop!

Any advice would be greatly appreciatted.
Old 10-25-2011, 07:23 PM
AJBert's Avatar
BF Veteran
Join Date: Oct 2007
Location: In the Colorado mountains
Posts: 2,385
AJBert is a jewel in the roughAJBert is a jewel in the roughAJBert is a jewel in the rough

I wouldn't replace any of them unless/until you get a code.

That being said, most manufacturers recommend changing all of them at 100,000 or 50,000 miles or 75,000 miles or take your pick to ensure optimum fuel milage.
Related Topics
Thread Starter
Last Post
2nd Gen S-series (1995-2005) Tech
08-27-2012 06:33 PM
GM hater
2nd Gen S-series (1995-2005) Tech
01-09-2010 02:32 PM
2nd Gen S-series (1995-2005) Tech
10-23-2009 06:37 AM
Engine & Transmission
02-02-2009 06:50 AM
2nd Gen S-series (1995-2005) Tech
07-11-2008 02:34 PM

Thread Tools
Search this Thread
Quick Reply: O2 Sensor

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.