ACDelco O2 sensors made by NTK?

[khill]

So I got some brand new ACDelco O2 sensors off Amazon and upon further inspection noticed "NTK JAPAN" stamped on em. Is NTK a OE supplier for ACDelco or did I get ripped off?

 

[KNBlazer]

I have both O2 sensors brand new as well, and checked and indeed, 1574 is stamped as "NTK assembled in USA"


while 1698 shows NTK Japan. Well I guess we can stop guessing why the price of an o2 sensor dropped so much in the last 5 years, I remember them being $100 a piece...

 

[Mark20]

All the auto makers are more assemblers than parts makers. They definitely use stuff that's basically off the shelf with maybe only a unique connector or bracket on it.

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