Is there a difference between the upstream and downstream sensors?
624407
Yes there is if you look at the connector on them you will see one is a 4 prong male and one is 4 prong female also it should say witch is upstream and down stream ,have a look at your old ones BEFORE you order.save your self trouble by making sure you get the right one the first time
624408
This is the Down-stream sensor (located after catalytic converter). The Up-stream sensor (located before catalytic converter) is Bosch part# 13474.
624409
Upstream sensors are located before your catalytic converter and downstream are located after the converter. Using the diagrams in the repair help section on autozone.com can help a lot.
624410
On the 1997 North Star Eng. In my Caddy NO. They are the same. On my 97 Eldorado this job was very easy. You will need the Oxygen Sensor tool to remove and install the sensors...Also a small bit of anti-ceze for future removal.Your Vehicle may require different sensors for up & down stream application.
624411
There may be, per your vehicle. Go to autozone online and enter your car or truck's model and year and see what they tell you. It's all free, I doit everytime I need parts for my Chevy S10 pickup, and then check amazon and ebay for better prices if avaliable. Good Luck
624412
The upstream is located in the engine on the front of the car, downstream is located underneath the car maybe near the middle of the car depending on what type of car.
624413
Yes there is if you look at the connector on them you will see one is a 4 prong male and one is 4 prong female also it should say witch is upstream and down stream ,have a look at your old ones BEFORE you order. save your self trouble by making sure you get the right one the first time
1109069
The sensor is built into the top of the unit and does control it but is not separate from the device itself. They should use the term "control" sensor and not remote sensor.
408149
The correct sensor is DENSO Part # 2344138 OE StyleUpstream Right/Upstream Left
1446237
Lenny is correct. The upstream and downstream are typically different on GM vehicles (Chevrolet, GMC, Pontiac, Buick, Oldsmobile to name a few). I never have understood why the sensors are different; externally only the electrical connectors are different, but maybe internally there's a difference...I don't know. What I usually do is use another website, typically RockAuto.com, to look up part numbers. The description will tell you UPSTREAM or DOWNSTREAM. Then I bring that part number to Amazon and see who's cheaper. Typically Amazon is since RockAuto charges shipping and sales tax (at least for me anyways; in WI). Lenny, you got lucky! I replaced all my O2 sensors on my K1500 Z71 and I'm still at 16-17mpg tops; hit 20mpg once doing 60mph for a 400mi trip.
1493750
15732 = Downstream sensor15733= Upstream sensorI believe you will need 1 sensor per bank
947353
This is the upstream sensor located in the engine bay going into the exhaust manifold. The downstream is a different model located by the catalytic converter.
2172507
I'm pretty sure the answer is no. Too bad because I have one that I can't use. You need to know your engine model and then look online to figure out what sensors work. You need two one upstream and one downstream.
287927
It is upstream. It attaches to the catalytic converter. It works as OEM. Mine is still running great.
1109183
The notes on the page say "UPSTREAM" - that would be before the catalytic converter. But, check your manual to be sure.
214330
yes. J. Bobay says same hardware version is required...I got one with an external probe and one (same brand) without. They're both on the same Linux server and provide me graphs and warning pages.I wrote a product review with a few more details and a couple sample graphs.
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
1852005
Richard,You have to do some research about the sensors that your car is using, in my case (Mazda Tribute 04) uses one upstream and one down with the same Bosh Sensor model.
1074806
No. A sensor can only be linked to one thermostat. On the other hand, multiple sensors can be linked to one thermostat.
1994682
It did mine, I got both sensors and had to splice one of them to make it longer so the connector would reach. I don't remember which one. But that was easy and it works great.
1608973
I bought only the sensor. I'm on my second sensor now I got about a years use out of the first one.
1812062
From my personal experience, it looks like there is no distinct difference. When I replaced mine, I wasn't too sure which bank it was so I tried both front and rear with the same sensor. They have the same end connection.
1283268
Each vehicle is different in the amount of O2 sensors they have. Could be 1-4 or even more.If you know you only have two, the upstream is before the converter and the downstream is after it.You need to know which is bad before you replace it. Most parts stores can scan you vehicle and tell which one is suspect.