does it matter what brand i get or is there a noticeable difference in quality?

 

ac delco or bosch.... dont skimp on quality for 5-10 bucks

 

Bosch

AC or Delphi are both made by Standard. You can find Standard in any Auto Value store.

 

I've ran the same Bosch o2's for almost 10 years with no problem.

 

I was gonna ask the same question. I've heard different things about the Bosch, but the guys that tune don't seem to like them. I want some GM, delco, or delphi, but none of my local auto value stores have them. Should I call a dealership? Anyone ever bought o2's from a chevy dealer?

 

I just replaced both of mine w/AC Delco. You can get them from Rock Auto.

 

Anybody used denso O2's? I am going to replace mine in the future, but have heard mixed things over the years. I have always gone with delco when replacing. (not often)

 

Everything has a tolerance even electrical systems. Bosch makes fewer O2s than Standard Auto Parts (the maker of GM, AC and Delphi). Because of this, theirs have a different operating range. Fewer parts to cover more manufacturers. Many MANY people including myself, have tried them and they don't work. Sure there are those that might hit the same operating range and they continue to work. More power to those who do. My experience has been less than stellar. As has so many others.

So, you can venture into using a part that you don't know whether it will work in your application like the Bosch or other aftermarket. Or you can use the brands that you know work. As I said numerous times, GM/AC Delco/Delphi are all made by Standard. Surely everyone can find one of those 4 names to purchase from a source other than a dealer. At the dealer expect to pay north of $80.