It is unclear if this is an upstream or downstream sensor.
287926
This is an upstream sensor. It has a short cable and special plug that fits Nissan upstream connectors. The cable is also thick because of the high temperature of the manifold.
287927
It is upstream. It attaches to the catalytic converter. It works as OEM. Mine is still running great.
728913
This Oxygen Sensor is a universal part that can be installed either downstream or upstream. Please be advised that this requires minor modifications.
1642997
The system is armed, not specific sensors. What you could do is remove specific sensors from the sensor & add it back later, but takes a bit of effort.
453099
When I researched it for mine, came back as upstream, which is where mine is installed. Now referred to as "alternative fit" in Bosch fit guide. I haven't had any problems so far....
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.
1283270
upstream is the number 1 sensor it is a air fuel ratio sensor the. down stream number 2 sensor is an o2 sensor #1 is closer to engine these are different and can not be interchanged
943593
No downstream leaks here. I can't imagine what would cause that other than age and corrosion on the line.
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.
1142868
Yes this is a "front stream" sensor. High quality with proper OEM connector. Easy installation and works great.
459334
Yes, this is upstream. If you have a SULEV emissions model this is the right part. If you have ULEV emission model then get part 234-9025.
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.
457073
It appears there is something wrong with the sensor! I will be contacting the manufacturer since it has a warranty.
848534
There 2 places where the oxygen sensor is installed/located. Upstream and downstream. You have to check with your mechanic which one is not functioning. It happens to me also and I found out that it's the downstream which is no longer working. The upstream is just fine as it was the one replaced. Normally, it should be replaced both at the same time.
1558003
This sensor is both bank one and bank two sensor 2. Sometimes referred to as left or right, upstream and downstream. These are the downstream ones.
1892581
Oh and by the way if they do recommend the Bosch 15716 Oxygen sensor for your car, than yes they work as an upstream and a down stream sensor.
144259
no this isnt. this is the upstream for the 1mz v6. there are two of the upstreams. i am unsure if your downstream wires in to the cabin like our sienna does
866002
There is only one sensor and it is inside the unit. I don't think this is meant to be outside.