Review on Enhance Engine Efficiency with Denso 234-9047 Air Fuel Ratio Sensor by Mensur Long

Bought for my 2006 Toyota Sienna. It replaces the sensor BANK 1 (right). It was an exact replacement for the stock A/F sensor. Pulling out the old sensor is very difficult. You have to access it under the car, and there's room there to just put one hand in. This means that you should try to unplug and pull with one hand at the same time. You can also get an O2 key on the device, but you have almost no room to turn it. I used a 3/8" mini ratchet with a twist grip and attached a 2 foot piece of 1/2" tubing for the lever. You have about 1 inch of play before the line pipe meets the exhaust pipe and stops your movement. That was enough to push it out and then I was able to screw it in by hand. The new pipe went through in just 5 minutes or less, but overall it took me about 90 minutes of work to find the right combination of tools and location to remove the old one. So far, so good. The car works better and there is no CEL yet.