Denso 234-4012 Oxygen Sensor, Original Version

Denso siempre la mejor calidad

I needed oxygen sensors for my 2001 Chevy Blazer. My truck has 3 oxygen sensors, and one after the CAT went bad causing rough idle and increased fuel consumption. Also, the engine light would come on almost everyday, after I clear the code. All 3 oxygen sensors are the exact same on these trucks, so if you have a 1998-2005 s10 with the 4.3 vortec, or a 1998-2005 Blazer with the 4.3 Vortec, this oxygen sensor will work, and you can buy three of these to change all the oxygen sensors. I decided to go with these Denso oxygen sensors because Denso is reputable, and makes great OEM parts that fit and function just like OEM. I have never had issues with Denso parts, ever. These oxygen sensors also came with graphite anti-seize already applied to the threads, which is nice, but copper would have been a better choice for exhaust components. I just needed one oxygen sensor, but decided to just replace all 3, since the original ones were all 24 years old. Took me 30 minutes to replace. My truck now runs and idles much smoother, and based on the scan tool reading, it seems these o2 sensors work just like it should!

Installed as a replacement on my GMC Jimmy, works flawlessly. Appears to match the OEM in quality.

Can't go wrong with Denso parts, just as good a OEM without the higher cost. At first I purchased a cheaper no name brand O2 sensor that was half the price and it only lasted 2 days.

Tried 2 other brands and neither resolved O2 sensor faults. Mechanic stated Denso brand was the manufacturers suggested brand! Faults immediately resolved after installation! Costly lesson learned. First brand I used which was hyped as high quality caused my catalytic converters too go bad 👎! Cost me $1000.00 to replace. Chunks of catalysis material was blowing out exhaust. Installed 4 new Bosch brand sensors after converters replaced and sensor faults came back after reset. Mechanic stated Denso brand was the manufacturers suggested brand. I installed all 4 new ones myself and faults reset automatically upon first start up. Engine running smoothly after onboard computer allowed time to make corrections. Really upset that Bosch brand did not function as stated in their description 😕! Returned for refund. 1st set I installed had a one year warranty were only in a few weeks, while I tried to trace and test wires and other sensors and even replaced computer. 6 months later with original computer reinstalled , still getting O2 faults. I installed Denso O2 sensors and problems solved 👌!