DENSO 234-4209 Left Side Oxygen Sensor – Direct Fit, Universal, 2-Year Warranty

This is the real deal: a brand new DENSO oxygen sensor, model 234-4209.

It’s meant for the left side of your vehicle, and whether you need it for upstream or downstream, this one’s got you covered.

Made in the USA, it comes with a 2-year warranty and it’s a direct fit—no rigging, no headaches.

Just to be clear: this is a traditional oxygen sensor, not an air-fuel sensor, so make sure that matches your ride.

It works with a universal connector and fits a wide range of vehicles, including GM and others.

Interchange numbers like 234-4209-15733 or SG300- should help you cross-check.

All the big names like Delphi, ACDelco, Bosch, and NTK are listed as comparable.

If your check engine light is on and your fuel trim’s off, swapping in this DENSO should smooth things right out.