is this air to fuel sensor or upstream?
1374410
This is for the sensor(s) on the manifolds under the hood. Bank 1 or 2 sensor 1 . Sensor 2 is under the car past the cat converter. This is also California emmisions model for my 1999 Toyota Avalon.
1761480
Yup, only difference from the upstream sensor is the length of wire. Denso is the one you want
1669000
It's an a/f sensor. It is new, and I have used these before, and they work good. You have to check your car to see if it is California or Federal emissions. It makes a difference.
1233595
This is downstream. part number 234-4162 is Upstream. The sensor should be universal to CARB requirements.
513109
The Denso 234-9021 is an Air/Fuel Ratio Sensor. Used two of these recently to replace both upstream sensors (Bank 2, Sensor 1 and Bank 1, Sensor 1) in my 2001 Toyota Avalon. The trouble codes that were set were P1155 and P1135. Use your OBD II tester to determine which sensor(s) have gone bad. The downstream oxygen sensors do not require the Denso 234-9021 oxygen sensor. By the way, the Denso part was an exact fit replacement and should be money well spent!
293053
Make sure that the fuel key that controls the flow of fuel is set to on , it is located on the left side underneath of the tank , my is been working fine foyer the oil sensor was reset because it was turning it off thank you
145907
On my 2000 Toyota Tundra V8, it was the upstream sensor. If the Sequoia has a 4.7L V8, it is probably the same.
1073403
AS far as I know it is a downstream sensor and I bought it for my 2004 Buick Century with V6 engine
1983866
It is the upstream sensor on most oem applications where applicable. On aftermarket applications, it is often used as a wideband sensor in a wideband kit. This sensor requires control of two independent cells and uses the pump cell amperage to determine air/fuel ratio. While many aftermarket systems output 0-5v, the sensor itself does not produce a 0-5v voltage for direct measurement.
1716998
The front sensor is the air fuel sensor. The rear sensor is the oxygen sensor. I installed both. Easy Job. My check engine light condition was fixed! Denso makes great parts and they fit EXACTLY
1812063
Need to know the make and model and engine type of the car to answer this question. Are you asking about bank 1 vs bank 2, or are you asking about upstream vs downstream? Go to the Denso web site to see what sensor you need. http://densoautoparts.com/find-my-part/vehicle-selection
1678823
On my car it's on/near the rear exhaust manifold within the engine bay. The 2nd sensor is on the catalytic converter. I bought a new sensor just to be safe when I had this part installed.
1331052
The sensor is located on the top of the fuel injector. Check the number to confirm it is the same
1149646
This is the upstream primary oxygen sensor. It is located on the top of the exhaust manifold and requires a special tool for removal and installation. The instructions from Bosch are very clear and easy to follow. There are some How-To videos on You Tube if that helps.
816062
In a 2001 Hyundai Elantra, it's the downstream O2 sensor (or the one that comes after the exhaust manifold).
1704097
Yes it is, sometimes it's called the oxygen sensor, both are interchangeable names. The code identifies what bank and sensor number needs to be repaired, they upstream sensors, relatively easy to change out with a sensor socket.
1669005
For my Toyota, Denso is OEM equipment. The part number was legible on the sensor I removed. It is my belief that the term oxygen sensor and air/fuel sensor are the same thing. Check out Densoaftermarket website for better clarification.