could you please help me? I'm looking for the sensor 2 which is inside upstream not down. I own an e46, 2001 325i please help me
1381721
Visit http://www.boschautoparts.com/auto for the correct part number. Then use the part number to search in Amazon.
2028554
Sensor is located on the back of the engine close to the firewall in the exhaust manifold. You can see it from the drivers side fender.
453101
Just look at the plug connector on the sensor your replacing, there are two types. Get the one that has the same style that needs replacing. Easy peasy!
823122
Wayne, On my specific application the oxygen sensor where all the same the two upstream sensors (before the Cat)as well as the two down stream sensors (after the Cat). You should stick with the OEM recommendation and buy the correct oxygen sensor for your application and its specific location. Your local part house should be able to help you with making the correct choices.
1761478
Yes the one I ordered was downstream. Dont forget to get an oxygen sensor socket as well.usually $20 but your parts store might have a loaner program that has one in their inventory.
850990
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.
408149
The correct sensor is DENSO Part # 2344138 OE StyleUpstream Right/Upstream Left
178194
This listing is for 2 sensors and the transducer. 45RFE takes a solenoid block. That transmission does not have individual solenoids. Thank you
1990572
I am not sure what you mean by down stream. We used the part on a 1997 Toyota 4Runner. It replaced the oxygen sensor on the front side. The removal of the old part and installation of the new part took less than fifteen minutes. The new part works fine and we longer get the check engine code that indicated the original oxygen sensor had failed. We saved $160.00 by purchasing this part from Amazon and installing it ourselves. In fact, my grandson crawled underneath the car and did it for us. As for finding an answer to your question, you might do an Internet search for upstream vs downstream oxygen sensors for your automobile. Autozone or another auto part shop will check the check engine light code for you for free. Toyota wanted $49.00 just to tell us what code had caused the light to come on. My son did a search on the Internet to find the lowest price replacement part. We were delighted with the results. We got the part quickly and it fixed the problem.
1283269
They are two different sensors, i recommend going to the Denso website to get the two part numbers. The upstream fails more often and the downstream one is usually cheaper.
1131807
I have heard it is kinda possible if you install a resistor the same ohm as the sensor.... I have no clue how that is accomplished so you may check YouTube. I would spend my money on this part and not have to worry about fubaring my car!
1606636
You should have 4 total, 2 upstream and 2 downstream. Sensor 1 is upstream, sensor 2 is downstream. Bank 1 is drivers side bank 2 is passenger side I think
144258
This sensor works the upstream sensors closest to the manifold in the V6 models. I believe the downstream sensor requires removing the drivers seat as the plug, floorboard seal and pigtail are different. Google the replacement of the sensor and there are several videos on line.
442236
I had my mechanic diagnose which sensor was defective. Replaced it with the one from Amazon. Still not working. Mechanic checked the new sensor and it is defective. I'm stuck with a paperweight.
1990570
Most Toyotas 1996 and newer have at least two O2 sensors - one before the converter and one after it. "Downstream" refers to after the catalytic converter. "Upstream" refers to before the converter.
23424
I believe it is up stream . the catalytic converter was towards the rear as i replaced the sensor.
536840
Cody Chase response is incorrect. I also have a Mitsubishi eclipse RS and it is a UPSTREAM sensor (before the catalytic converter). I purchased this product and installed it myself. Fuel economy improved