Is this item the "Upstream" Sensor or the "Downstream" Sensor?
1621712
It is for the upstream location before the catalytic. Right below the exhaust manifold.
1852004
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.
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
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.
1149645
This my friend in the pic is the up stream sensor. It is extra long and comes with the new clips to secure the wire. Hope this helps. You may also need the little round sensor remover to make the job easier.
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.
408149
The correct sensor is DENSO Part # 2344138 OE StyleUpstream Right/Upstream Left
1283265
In the couple of cars I'm familiar with the upstream and the downstream sensors are different.
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.
1142868
Yes this is a "front stream" sensor. High quality with proper OEM connector. Easy installation and works great.
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
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.
1493750
15732 = Downstream sensor15733= Upstream sensorI believe you will need 1 sensor per bank
1449698
Correction: I was mistaken, this did not replace the upstream sensor, it didn't fit, I had to order a different item. My apologies.In my 2005 Pontiac Vibe it replaced the upstream sensor perfectly.
1283267
On my Honda CRV, code was "Bank 1, sensor 1." This sensor is upstream, which reads exhaust gas as it enters the catalytic converter. The downstream sensor (which is a different part) reads exhaust gas as it exits the catalytic converter.
2104288
This is downstream. On mine, it was right after the cat. Plugged right in. Worked perfectly.
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.