Enhance Performance and Efficiency with GM Genuine Parts 213-3538 Heated Oxygen Sensor Review

Square tip, fits perfectly, does the job, great price. Can't ask for more. O2 sensors are something I will only buy OEM and this post cat sensor does the job.

I bought this Downstream Oxygen Sensor along with 213-3533 (Upstream) for my 2006 GMC Sierra 4.8L with 120k miles. I read where you should replace them after 100,000 miles. I'm glad I did that, now I don't have a bad tailpipe and the truck runs much better.

Genuine GM parts at a great price. Replaced the original oxygen sensors after several trips to the dealer to try and fix intermittent faults with Stabil Trac and Traction Control, eventually OnStar corrected the fault code to show O2 sensors! Original equipment lasted 200,000 miles but ideally should have been sooner but according to our GMC dealer it hasn't.

The product was perfect for my SUV. My gas mileage was pretty bad so I used my OBDII scanner and found that my B2S2 O2 sensor was reporting almost 0 volts. I replaced it with this sensor after a cat, then started the car and watched the reading stay at 0 for about 30 seconds and then gradually increase and remain fairly stable. Both of my pre-cat sensors jump quite a bit so I'm going to replace them with a pre-cat sensor model. The sensor comes with anti-seize threads.