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1-20 of 23 Results
  1. Europe
    Hi, what lambda/oxygen sensor brand should i use? Oem number 11781247406 Any tips for replacement?
  2. UK
    Hey, I heard that e46 had 4 lambdas so I was looking for them and found two on the exhaust cat. I couldn't really find nothing else. I own 318i 1998 M43b19
  3. UK
    I recently bought a 318ci but have had problems with the botched job done to the exhaust. The pre-cat o2 sensor (before the catalytic converter but after the downpipes merge) is there in the exhaust but has no wire coming out of it. I have ordered an OEM o2 sensor for this position and it has a...
  4. E46 General
    I promised to document my oxygen sensor behavior so here you go. About three months ago or so i changed my precatalytic oxygen sensors (140k on them). It was followed by VCG change and oil change. After oil change my BCG started leaking oil right on top of oxygen sensor 1 bank 2. O figured it...
  5. E46 General
    I'm fairly certain my 2004 330Ci cats are completely stopped up. Bad loss of power, extreme fluctuation of O2 Sensor 2 data when applying any throttle at all, and the engine completely shuts down when I give it any more than half throttle - almost like the computer just shuts down and the manual...
  6. Australia
    E46 Lovers, I did a diagnostic check on e46 318i. It showed 2 confirmed error codes error 1: p0139 - heated oxygen sensor 2, bank 1, slow response error 2: p0030 - heated oxygen sensor 1, bank 1, heater control - circuit malfunction I am thinking of replacing oxygen sensors on bank 1, if after...
  7. E46 General
    Hi all, new to forum but have found loads of help from lurking and reading past posts to fix my BMW. Little bit of background on my car: Have a 2002 330ci manual, about 125k mi and as far as I can tell is pretty much original everything (except what I have done to it) brake buster vacuum...
  8. E46 General
    After getting my warped head gasket, cracked expansion tank, and clutch replaced I've been getting oxygen sensor codes. I've read around that it isn't always as simple as a bad oxygen sensor, so before I go out and buy some new ones, I was just curious about what other issues may cause o2 sensor...
  9. Driveline, Performance, Tuning
    My car is an 05 330i zhp with about 170k miles. It still has the original oxygen sensors and I’m trying to determine if it’s necessary to replace the o2 sensors as preventative maintenance. I don’t have idle issues or any check engine lights at the moment. Every other preventative maintenance...
  10. E46 General
    Hey, so another problem started last night. i had these intermittent loss n power at 80mph ( like stuttering ) which would go away once i fet go off the throttle and went back on it again ( this is only when i am trying to accelerate slowly if i am accelerating a bit hard like 65%throttle...
  11. E46 General
    So I have replaced the oem headers with aftermarket catless headers. I’ve been driving with CEL on and I want to try and fix the misfiring problems. I’ve got 3 misfires on my engine. I only have the o2 sensors that go before the cats on and the ones after the cats are off. Recently I have...
  12. E46 General
    So I have some pending codes that aren't hurting my car but I tried to get them off anyways for fun. Yesterday I swapped my existing pre cat 02s with each other and my car ran like a POS haha. It immediately went into limp mode and I just switched them back and the car runs almost perfect again...
  13. E46 General
    I have had a fun time the last few days...yes, days...trying to remove a post-cat oxygen sensor that refuses to dismount from its factory hole. The car has 335K on it, so it's no surprise it's rusted to hell, but I am starting to get to that stage where I'm out of options, but I just can't see...
  14. E46 General
    Hey i was told by someone that if one short term fuel bank was running at 4.7 and one at 9.4 . Then my first is lean . He also told me to take a look at my o2 sensors but i dont really know what im looking for . Can anyone tell me if my o2s look like they have been running lean ? Or even rich?
  15. E46 General
    Hi, I have just replaced my o2 pretty cat sensor on my first bank after getting a fault code. Reason I only replaced on is because the other one was the wrong type. But now since I replace it the new o2 sensor is throwing miss fire codes for 1 and 3 and 2 fuel trim malfunctions any help would be...
  16. E46 General
    My car had CEL from November of last year. Local mechanic changed a valve and said I am good to go. But the CEL came back again and it read P0491/92. I called the mechanic and he said secondary air is used only in cold start and its ok to drive it for a while. Done this till March and I took it...
  17. E46 General
    Hi Guys I'm planning change my pre cat oxygen sensors. But my question is that are the two sensor same. Because I was looking at Advance Auto Parts' website, it has***65279; two upstream sensors, one is for cylinder 1,2,3, another one is for cylinder 4,5,6. Are they same or I need buy each...
  18. E46 General
    I need to change my o2 sensors however looking at realOEM I'm still confuse which one are the ones you see on the right side of your engine by taking the engine cover and the ones you need to get under the car. RealOEM says I need part # 11787523434 11787523435 for that one that appear to be...
  19. E46 General
    So i have an issue with my 2000 323Ci. The car once in a while idles a little odd (goes up and down but has yet to stall) However driving it for a couple minutes it is alright But it does not happen all the time but i would like the fix it before it becomes any worse. I get the following...
  20. E46 General
    Like many others on this forum, my SES is on and peake tells me it is one of the pre cat oxygen sensors (off the top of my head i can't remember which one....irrelevant). My ride has 106 k 2002 325 XI. I've read the pre and post cat DIY's. I know bosch is 'OEM', but i decided to go with DENSO...
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