I ordered the O2 sensors one at a time due to funds, and the 2 that were sent to me look different. Only one looks like what came out of the car, and the other looks like a 4-wire with different colors (blue, black, white, etc) than the stocker (yellow, pink/red, etc) and the main piece has holes in it rather than slots.

Pics to come...

edit:
what I was sent - -



what came out, and the other sensor I was sent looks like:

 

What brand? What's the part number on them? Need more info.

 

They shipped me ACdelco AFS75's....or so they say

 

What did the package say? Where's the package they came in?

 

They were ordered from rockauto.com. They both had the ordersheets with them that said they were acdelco afs75 oxygen sensors. The 1st one was in an unmarked plastic bag, while the 2nd one that came had acdelco written on the bag.

edit....found the first bag....has some gibberish code on it.

19178930
1E1QS
001
08A4

 

nobody knows? I installed them for now, I'll have to order a 3rd later on. Will I be okay?

 

There have been previous threads on this. Design change. You got one old stock and one new stock.

The only concern would be that the unmarked one was a return.

 

The smaller one is a Denso

 

https://www.camaroz28.com/forums/sho...d.php?t=586464

 

Those are the new Delphi O2's.
They work quite well.

 

Thanks guys....I tried searching and went through many 02 sensor threads.

I read on my old stock o2's, they said AFS 65? Is that an even older one?