Denso 234-9102 upstream O2 sensor
 

I've searched around and haven't seen anyone mention this specific sensor. Anyone tried this Denso? It claims to be wideband and heated, it can be had for under $100, and Denso is a good Japanese brand. Thanks.

I think OEM was denso, but not sure if it was that one.

This is the single most important sensor on the car, almost every engine adjustment is based on it.. I would not try to cut dollars here..