How many downstream o2 sensors is in a 2001 4Runner Limited? I bought one but I'm not sure if there's 1 or 2 o2 sensors. I'm only looking for DOWNSTREAM (after the catalytic converter)
640319
Not sure on the 2001. I have a 2005 4runner v8 and there are 2 upstream and 2 downstream. The downstream ones are real easy to see. Just locate the CAT Converter(s) on the exhaust pipes which will be larger in diameter then the pipe and find any sensors sticking out with wires AFTER the CAT more toward the tail pipe. Good luck
640320
Mine was an ''02 Camry. Best to crawl underneath an find them. That is what I needed to do. I had 2 downstream. I changed both as they were the originals.
640321
There are 2 oxygen sensors total. One before the catalytic converter and one after.
85259
If you have the V6, both upstream sensor should be the same. Your diagnostic code should tell you if your problem is bank 1 or 2. I only needed to replace the bank 1 sensor and that solved the issue. Check out this web page for more info, (maybe more than you need, or want). http://www.autoshop101.com/forms/h37.pdf
1693937
Hello, Sir;For the UPSTREAM CNG Engine the oxygen sensor part number 13117For the UPSTREAM GAS Engine the oxygen sensor part number 15716For the DOWNSTREAM GAS Engine the oxygen sensor part number 15717 or 15718.Thanks. Hope this information are helpful. Thanks
1005961
I don't think they started making RX until 07? Yes, this Air Fuel Ratio Sensor (not to be confused with Oxygen Sensor). Its located before catalyst - firewall side (upstream right).
1812057
I am mechanic and i dont see that is a air fuel sensor, if your car use air fuel ratio, it is not posible to chang for a second sensor, because the second is a oxigen sensor and work very different, you can not change.
144261
I'm not sure if this is for the downstream o2 sensor. Maybe someone else can chime in on that. It's bank 1 sensor 1 near the firewall and you can also use this on the manifold towards the front bumper. They are the same. Yes. This one comes with the wire and plug. Once you are able to break them loose installation is easy.
850989
Before you buy it, go to the denso website at densoautoparts com.You can check your fitment there to be sure the amazon information is correct.For your car, the correct upstream (before your catalytic converter) sensor is 234-9004.The correct downstream (after your catalytic converter) is 234-4122.The item you are looking at here, the 234-9005 is not the right sensor for your car.
1562089
2000 Ford f150 5.4L regular gas This part number 15717 is specified for the downstream; bank 1&2, sensor 2 in both cases. Part number 15716 is for the upstream sensors(sensor 1), either bank. These are original spec, exact fit, california approved O2 sensors. They do an excellent job. The downstream sensors can be replaced with a standard box or open end wrench. (I forget the size, 7/8 I think) very easy, takes all of 5 mins each. The upstream are in a much tighter space, especially the passenger side. Passenger side btw is the number 1 bank. Driver side is the number 2 bank. I highly recommend you get the short offset O2 sensor socket wrench. Powerbuilt 648691 Oxygen Sensor Offset Puller or something like it.
440599
Those threaded sensors were the upstream o2 sensors on my 4.7 tundra v8.. the downstream sensors had a bolt on each side to secure it. At least that was the case for my application.
1168737
No the upstream (first) O2 Sensor should fit in this header. The downstream (second) sensor is already installed before your other catalytic converter. In order to prevent a check engine light I suggest moving the downstream sensor behind the second catalytic converter if you're buying this header.
444477
This part is for either Bank 1 Sensor 2 or Bank 2 Sensor 2 (the sensor after the catalytic converter). Sensor 1 is the sensor that adjusts the air/fuel mix. It is before the catalytic converter and will likely be a different sensor type. Best to double check first.
464652
Our Suzuki's V6 has one on each bank of cylinders. It also has at least one other downstream, somewhere. I'm not yet sure exactly how our exhaust system is routed. I know we have two header pipes and two tailpipes, but whether or not there are one or two additional sensors in between (or catalytic converters, for that matter) is a question I'll have to answer when I find the time and energy to get these grumpy old bones beneath the thing. In any case, I'd check elsewhere for information on a particular car model, as this sensor is made to be used on an assortment of vehicles. Kind of like those Takata airbags that are leading to so many recalls, for Honda and many others. Best wishes. Our Suzuki's V6 has one on each bank of cylinders. It also has at least one other downstream, somewhere. I'm not yet sure exactly how our exhaust system is routed. I know we have two header pipes and two tailpipes, but whether or not there are one or two additional sensors in between (or catalytic converters, for that matter) is a question I'll have to answer when I find the time and energy to get these grumpy old bones beneath the thing. In any case, I'd check elsewhere for information on a particular car model, as this sensor is made to be used on an assortment of vehicles. Kind of like... » Read More Our Suzuki's V6 has one on each bank of cylinders. It also has at least one other downstream, somewhere. I'm not yet sure exactly how our exhaust system is routed. I know we have two header pipes and two tailpipes, but whether or not there are one or two additional sensors in between (or catalytic converters, for that matter) is a question I'll have to answer when I find the time and energy to get these grumpy old bones beneath the thing. In any case, I'd check elsewhere for information on a particular car model, as this sensor is made to be used on an assortment of vehicles. Kind of like those Takata airbags that are leading to so many recalls, for Honda and many others. Best wishes. « Show Less
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!
850113
This is the Up-stream sensor (located before catalytic converter). The Down-stream sensor (located after catalytic converter) is Bosch part# 13444.
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
1417200
There could be more than one O2 sensor. This looks like the O2 sensor downstream from the catalytic converter.
1493752
there are a total of 4 oxygen sensors on that vehicle, 2 before the catalytic converter for fuel trim and 2 after that monitor catalyst efficiency. Although I believe the front and rear are different.