my existing cat has the o2 sensor in the cat. Does this? 1998 tj
776087
It does not......I drilled a hole in the pipe between the cat and muffler I and welded the bung on and that is where my O2 sensor is now.....
1999132
I cant say if it will physically fit but it does not come with provisions for o2 sensors. Those must be added to the cat or elsewhere in the exhaust piping. The Honda crv I installed this on did not get a check engine light for oxygen sensors after this was installed and has been fine for about a year now
716747
I had this installed on a Mini Cooper S. The installer had to weld it to the exhaust as close to the Cat as possible, as heat can destroy the O sensor (force injected, supercharged, car). On my car that was about 4" from where the exhaust pipes comes together and 2" before the CAT. I definitely needed the longer sensor cable that came with this kit.
2016343
If your rig calls for a 13477, this IS a 13477. Also, the fitment guide says a 13477 2004 BMW 330xi (an X3). No problem. The pertinent question is whether you are after a pre or post cat sensor. Yes, the sensors before the cat are usually referred to as 'air fuel' sensors, not O2 sensors, but it's not unusual for folks to call all four sensors by the same name. The upstream (first IN line) sensors do sense oxygen, but are of a different construction/type than the downstream O2 sensors. IF you are after a 13477, this is it. I'm not sure this venue supports html..but here's a link that explains the system well: http://www.bimmerfest.com/forums/showthread.php?t=654792 If your rig calls for a 13477, this IS a 13477. Also, the fitment guide says a 13477 2004 BMW 330xi (an X3). No problem. The pertinent question is whether you are after a pre or post cat sensor. Yes, the sensors before the cat are usually referred to as 'air fuel' sensors, not O2 sensors, but it's not unusual for folks to call all four sensors by the same name. The upstream (first IN line) sensors do sense oxygen, but are of a different construction/type than the downstream O2 sensors. IF you are after a 13477, this is it. I'm not sure this venue supports html..but here's a link that... » Read More If your rig calls for a 13477, this IS a 13477. Also, the fitment guide says a 13477 2004 BMW 330xi (an X3). No problem. The pertinent question is whether you are after a pre or post cat sensor. Yes, the sensors before the cat are usually referred to as 'air fuel' sensors, not O2 sensors, but it's not unusual for folks to call all four sensors by the same name. The upstream (first IN line) sensors do sense oxygen, but are of a different construction/type than the downstream O2 sensors. IF you are after a 13477, this is it. I'm not sure this venue supports html..but here's a link that explains the system well: http://www.bimmerfest.com/forums/showthread.php?t=654792 « Show Less
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.
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
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
602061
For 2002 Tacoma V6, this is the O2 sensor after the Cat converters. It has the extended cable assembly that routes through the floor panel and connects under the passenger seat. This is not the A/F sensor that is located before the Cat's
1417200
There could be more than one O2 sensor. This looks like the O2 sensor downstream from the catalytic converter.
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.
1469671
As it was explained to me #1 O2. sensor is closest, ahead of cat converter toward engine.
1034405
I ended up doing both O2 sensors because it was cheaper. But less than a year later my rear cat converter is done and needs changing. I have 235,000 miles on though... I passed emission a month before the P0420 code came back, then it was my cat, so... I think the sensors were bad too... hope this helps!
85257
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
1417199
Hey James, I just recently(within the past month and a half) replaced my o2 on my 02 Toy Tacoma 4x4 3.4L with an automatic tranny and this exact sensor #234-4189, working great for me. I am told by my mechanic that it is the same one for the manual trans. Hope this helps dunc g
855733
I am not a mechanic so cannot answer your question. My cat converter needed to be replaced, my engine light was ON all the time. It worked replacing it for me. No problems so far. No engine light either. All the best.
1678823
On my car it's on/near the rear exhaust manifold within the engine bay. The 2nd sensor is on the catalytic converter. I bought a new sensor just to be safe when I had this part installed.
1747000
Yes. There is a plug that snaps right in. I drilled and tapped my exhaust manifold, found a rubber plug in the floorboard and ran the cable under the carpet, up to the kick panel and under the door weather-stripping right up to the unit. Mine has given me a couple of erroneous readings, but when I shut down and restart it seems to zero out and recalibrate. I really appreciate the added information that the egt temp sensor gives me, I just wish that I would have purchased the expandable unit instead, so that I could add a fuel pressure sensor. Here is a better pic of what you actually get: http://www.ebay.com/itm/like/300959464945?lpid=82 Yes. There is a plug that snaps right in. I drilled and tapped my exhaust manifold, found a rubber plug in the floorboard and ran the cable under the carpet, up to the kick panel and under the door weather-stripping right up to the unit. Mine has given me a couple of erroneous readings, but when I shut down and restart it seems to zero out and recalibrate. I really appreciate the added information that the egt temp sensor gives me, I just wish that I would have purchased the expandable unit instead, so that I could add a fuel pressure sensor. Here is a better pic of what you actually get:... » Read More Yes. There is a plug that snaps right in. I drilled and tapped my exhaust manifold, found a rubber plug in the floorboard and ran the cable under the carpet, up to the kick panel and under the door weather-stripping right up to the unit. Mine has given me a couple of erroneous readings, but when I shut down and restart it seems to zero out and recalibrate. I really appreciate the added information that the egt temp sensor gives me, I just wish that I would have purchased the expandable unit instead, so that I could add a fuel pressure sensor. Here is a better pic of what you actually get: http://www.ebay.com/itm/like/300959464945?lpid=82 « Show Less