- Manufactured to detect the amount of exhaust gas air fuel ratio
- Constructed from durable material
- Features zirconia solid electrolyte
- Highly accurate
- Easy installation
Product Description
Denso Air and Fuel Ratio sensor is designed to detect the amount of the exhaust gas air and fuel ratio. It is constructed from durable material that is corrosion and abrasion resistant. This sensor features zirconia solid electrolyte integrated with alumina heater substrate which precicely controls the amount of oxygen concentration that flows into the diffusion layer to limit current flow. This sensor can easily be installed and ensures longevity…. More >>
2 Responses to Denso 234-9021 Oxygen Sensor
John Nguyen
July 30th, 2010 at 11:08 pm
I had bought this for my 2003 toyota solara v6 automatic noncalif spec vehicle to replace the bank 1 sensor 1 O2 sensor. Be warned, Denso does a confusing job of labeling which sensor is which. When they say the sensor is for the front, it refers to both upstream sensors underneath the hood, while when they say rear, they mean downstream sensors near the exhaust. The Denso 234-9021 was the correct part I needed after ordering the wrong part due to this confusion. I bought the part for 129 on Amazon, best price I could find anywhere. I dunno why the price keeps fluctuating every few days to 135, but look around. I would have given it five stars if Amazon would have shipped it quicker. It was labeled as being “in stock” but took about 3 days for them to process it and send it out.
Rating: 4 / 5
Pete K
July 31st, 2010 at 12:03 am
This sensor replaces both bank 1 and bank 2 sensor 1 on the 2002 Sienna. These sensors seem to degrade by around 100,000 miles, and need to be replaced.
Rating: 5 / 5