Hi, I have a 2004 Nissan Sentra 1.8 and I need it to pass emissions in a few months and the Upstream Oxygen sensor went bad. I'm just wondering which brand should I buy from, I narrowed it down to Denso and Bosch, the Bosch seems a little cheaper in price. I've tried to find out what Oxygen sensors Nissan puts and everyone seems to be saying the Bosch is the one.
Best to use OEM. I found that out the hard way, replaced a bad O2 sensor with an "equivalent" bargain brand and the car threw off all kind of crazy codes that had me chasing my tail. Finally I bought and installed the OEM leading brand sensor (Bosch in my case) and the problems went away.
Yep. OEM is what one should use for replacement. Especially those before the cat. Those are "special" sensors, … called an air-fuel ratio sensors, or a wide band ratio sensors. They measure combustion gas oxygen content before the exhaust is cleaned up of pollutants.
Anyway, … just get an OEM sensor. Period.
F.S.
Both are good.
Denso or NTK
