This is a real Denso part and clear the eng light. In my case c eng light on .... Bank 1 sensor 1 (Up stream sensor close to passenger side) replace this part and work on my car Camry 2000 3.0 Japan model.
Don’t try on those part still mark “Denso” cost bellow $100. It will not result the issue.
Top is lower cost not working part.
Bottom is good and work part.