🚀 Denso 234-4163 Oxygen Sensor: High-Performance Monitoring for Optimal Engine Efficiency Review

Not too difficult to install. A few days after replacing the sensor, the Check Engine light went out. Denso is the right brand for Toyota Sienna parts.

Fits TOYOTA SIENNA 2003 post cat, P0136 Install this sensor after running -800 miles do not check engine light again. Dealer Fee $215.00 per transducer, $3 per unit For lock nut (recommended replacement)

It helped! I PASSed the California Smog Check after replacing this part and the bank 2 sensor. My local mechanic told me it was necessary to replace the entire catalytic converter system for a whopping $1700. I installed this part and the bank 2 sensor and (voila!) I passed the test! Many thanks to Revain for providing this product at a significantly lower price than my local parts store.

After finding the old one on Grandpa's Siena in 2002. I had to remove the passenger seat to find a cable clamp that pushed the cable through the rubber boot hole. I used the O2 sensor socket to remove the sensor and get rid of all the rust from a broken bolt, but still managed to do it. This sensor comes with a paper/metal gasket which I tried on several times until it was tight. I had to remove all the rust. Spray with rust remover and clean with a wire brush. The sensor fits well and firmly…

The check engine light for my 2003 Sienna came out two months ago with code P0420. I cleared the code twice and each time the light came back after 200-250 miles. P0420 indicates a catalytic converter malfunction. The computer "knows" this by tracking the output of the sensor (bank 1 sensor 2 on the Sienna) after the cat, and can be fooled by a bad sensor. Since the sensor is more likely to fail than the cat itself, replacing the sensor would be the natural first attempt to fix the problem. The