You are incredible. Thank you so much for helping all of us with e46’s. My is a 2000 e46, 328-M52tu engine. Thank you again for all you have done for me. You should be a BMW head Mgr. in any BMW Dealer. Thank you. Tonio.
NOT all of us with e46's. this guide only applies to about 20% of E46's. dude doesnt know what he's talking about, there are over a dozen different engines in E46's, most of which have different o2 sensor setups.
I have the M56 engine in my 2005 325i which required the Bosch Parts # 17175 and 17176 sensors. The replacement process will require the removal of the engine cover and air pump for best access. The cords go around the rear of the engine and up onto the top (under engine cover) where they connect. This is also a good time to inspect the stiff vacuum line running around the back of the engine, it shares the harnesses holding the O2 sensor wires in a couple of places. Mine was very brittle and broke during the sensor replacement. Hope this helps someone out there, I ordered the sensors in this video only to discover they were completely different when I attempted their install the first time.
Both versions of the 0² socket are at Harbor Freight. I got the one he recommended against anyway and it worked fine on my E46 0² sensors using my 1/2” breaker. You have more than 30 days to return it at Harbor Freight even if it did fail
Just a heads up! Some of the comments are wrong on here as far as the sensors being the same part numbers. According to my research and I have an 325I M54 engine, the part numbers are DIFFERENT and are as follows: Bosch 17216 - bank 2 (4-6) Back Bosch 17215 - bank 1 (1-3) Front Or Bmw Part numbers: 11787523435 - cylinders 4-6 11787523434 - cylinders 1-3
So i'm kinda confused here. I am at rockauto and wanted to get a bosch and theyre saying both bank 1 and bank 2 sensor can use same o2 sensor... is that true ?? or do i have to make sure to buy different o2 sensors ?
Hey there 50skid. Thank you for all your videos. I am a new owner of a e46 2001 300i. I knew absolutely nothing about BMW's until I found your videos. My question is this.... Do you have a video on replacing the after cat o2 sensors?? I couldn't find anything in your video library. If not do you think you will be making one? Thanks again for all the great info.
I don't have that one just yet. I usually don't make videos on replacing parts until I actually need to replace them, you know? And replacing those is a $100 thing. Every penny is currently being spent on accumulating parts and tools for my upcoming engine rebuild.
50sKid Hey there. Thanks for the reply. I totally understand where your coming from. I know those darn things aren't cheap unless you go with the cheap China knock offs. I guess I was more interested in the locations of them and how difficult it would be to DIY it. I just bought my car about a month ago and am learning a lot from you. I've pretty much watched every video you've done. You do a great job and I thank you for all your knowledge your sharing with all of us. Please keep it up!! 😊😊😊
Thanks so much for creating these amazing tutorials on BMW's really helpful you have saved me a lot of bucks just following your DIY, thanks once again. So the pre cat sensors are the same or matching pair so as the post cast ones as well when you are buying?
ANyone know? The manual says on M54 the sensors should be replaced at 100k. Would you do this or just wait until they fail? Also it says the whole exhaust system has to come off for the post cat ones??/
"Replacement of oxygen sensors at the specified intervals ensures that the engine and emission control system will continue to operate as designed. Extending the replacement interval may void the emission control warranty coverage."
I have a 2000 bmw 328i standerd sedan & im wondering if there are the upstrem sensors ? & if so are they both the same ??& in the other vid about the post cat sensors , are thos the downstream o2 sensors ?? Please respond !! & love ur Vids!! Very useful.
Thanks for the videos. Got a P0171 code and just replaced my CCV and didn't go away. Watching you vids I think its most likely a Pre-Cat O2 sensor. Especially since I don't have the P0174 to go along with it. Thanks again all your videos have been helpful over the years!!!
@@RandomRubio Yes watching these video step by step. I was able to do it without removing the intake manifold. Hardest part was going from the top to remove lower intake boot. The clamp is on the bottom and hard to access from the top if it has never been done.
What would it be if it was both p0171 AND p0174 codes? I’m thinking of getting all 4 sensors replaced just to be safe but I just want like clarification.
seems like a pretty straightforward DIY, I've been watching a LOT of your videos... best e46 series I've found. Bank 1 Sensor 1 is probably the first one you changed here, right? Mine is throwing a code, I think it's time to replace. Can you reference how to test an O2 sensor? I have a multimeter and a desire to learn, I'm just not having a ton of luck finding an answer.
What code are you getting? You CAN test to see if an O2 sensor is functioning by unplugging it (it's okay to run the car when it's unplugged) and connecting the leads from a multimeter (set to DC voltage mode in the 2 volt range) to the black and white wires (the grey wires are for the heater). If the sensor is working, you should see the voltage switching between ~0.1 volts and ~0.9 volts. However, this isn't the best, most definitive test for whether an O2 sensor is working, because if you have an exhaust leak or a vacuum leak somewhere before the sensor that is letting oxygen into the system, that will skew the results.
+50sKid sorry for the delay, had to wait for the codes to come back since I cleared them. I currently have p0130 (o2 sensor bank 1 sensor 1), p0134 (no activity at o2 sensor circuit bank 1 sensor 1) and p1421(secondary air?) I plan on going through your vacuum line video but I'm a weekend warrior learning slowly amidst my two young kids and full time job... I've got a lot of work ahead of me, I'm sure.
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
I did this today I couldn't get any of these socket but found crow foot sockets (idk what they are called in the states im from aus) But they worked amazing just found it hard to unclipped it
What year is this BMW? I saw another video and he took the valve covers off in order to disconnect the sensor cables, whereas yours are close to the actual sensors. I have a 2000 e46 328CI, with 134k miles. Also, I would assume it's best to replace both, if you're going to do one, yes?
Always the best DIY , Hey bro Today I got the P2240 B2S1 ! I swiped it with B1S1 still haven't get the code yet , but from Your experience could it be an O2 sensor, fuel sys or DME need an update, 2004 330ci.
You have a wiring problem to the O2 sensor. Not the two grey wires, it'll be the white or black wire (I forget which one is the ground in this case). Anyway, check the entire wiring harness to find the break in the wire and repair it.
This been about a day since I swapped them , I'm pretty sure the ses will get back after 100 miles or so ,but I'll let You know about any updates. You mean the O2 sensor wire ? or the entire wiring harness?
50sKid Alright bro , remember when I swapped the O2 sensors? I kept them that way, now after 700 miles and today I noticed a surging idle , codes are P0171 , P0174 , P0440 😠😠 BTW I forget to mention from the beginning that I used to get the " check gas cap " light every once in awhile.
I was gifted a 01 330i the 1st sensor of mine has the wire and connection point for the 02 sensor is fried it was left sitting on the headers so now I can’t connect a new 02 sensor any videos on replacing the connector
My 325i spent a few months running rich because of an unregulated fuel pump (replaced filter/reg) - is it worth renewing my front O2 sensors in case of fouling?
I m having an o2 sensor issue. I disconnected the sensor. the wire in the connecter was pushed back on two wires. I pulled them out to spread the little tabs. I did not mark the location of each wire. so I went to check the other sensor and when i pulled to unplug all the wires pulled out of the connector completely . can anyone tell me from the sensor to the plug wiring. 2000 e46 330i bank 1 and 2 sensor 1. this is the first of the 330's and the 1 sensors are at the end of the header and the 2 sensor is under the rear footwell
@50skid I am trying to find out what type of sensor I need. What is written on the box please. I can't seen to get a straight answer. So i can order a pair. Thanks for the help.
Hello. After replacing the oxygen sensors, do you have to put the computer to program? Well, I had turned on the check engine and after replacing them the check engine turned on again.
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
Was there a heat shield in the way of yours? My 2002 M3 has a giant heat shield that has taken several hours to loosen, and still blocks the o2 sensor.
I originally had a 492 code. I ended up replacing dried up lines on the air relay switch behind the manifold under the cabinet filter assembly. One hose wasn't even on and the other was cracked . After doing this and clearing the codes I drove my 2002 bmw 325i wagon about 25 miles and the check engine light came on again. However, the code is now 0430 low threshold bank 2. Any idea what might have cause this. I thought maybe as I looked at your video and seeing the sensors where in the same location as the secondary intake valve line the might be a connection
Hi, i watched your video but i am curios , are the post cat and the pre-cat sensors identical? do you know the part number for the pre-cat? i've noticed you've put it in the description in the post cat video. Good job with these videos, they are very helpful, thank you! Cheers.
Hey, I was wondering if anyone knew what the part number is or what you call the wire you plug the o2 sensor into. It's the wires between the o2 sensor and the harness.
hey i really need help with my 2005 x3 my car got no power when i step on the gas and when i go up the hill it wont make it do you know what wrong with my car?
Hey thank you for the great information. I've seen a few other videos on doing this job and you're the first one that told us to put the anti seize on the threads. Good to know. But I'm wondering if there's a trick or some way to get the other end of them off. I see that there are some little tabs on the plastic connectors but i don't really see any special way of undoing them. I see in other vids that they seem to just pull them apart. Is that it? Just grip and pull as hard as needed to get them off? (Holding them in the right place of course). I don't want to break them or rip out something while doing it. Thanks again.
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
acxel rose yes and no. The issue stopped after I unplugged the oxygen sensors from wire harness and cleaned connectors. I think I was either getting same codes because of a bad connection or codes hadn’t cleared yet. Either way codes and misfires are all gone
I bought eBay headers for my e46I know I would have a check engine light on but could I just run it with no O2 sensors and all four of the holes capped
Does the sensor give an error code when it's faulty got a maf code but got a new one and the code is still there vacume leak or could this sensor be the culprit?
I drive a 2002 530i. I had P0491 (Secondary Air Injection System Insufficient Flow Bank 1). I replaced Air Valve but could not get SAS monitor to set. Next I replaced Bank 1 Pre Cat O2 sensor, P0491 code gone and SAS monitor set at FIRST cold start up(after idle 2.5 minutes), BUT I got P2096 (Post Catalyst Fuel Trim System Too Lean Bank 1) (but at least all monitors would set after running 1 drive cycle). Unfortunately I left the wire that plugged into the sensor laying on the manifold and the wires melted I got P0172 and P0132) after repairing, these codes are gone, but I STILL have P2096 and no monitors will set! So I'm back to trying to get SA monitor to set!!!!!!!!! Could I be getting too much air now that the valve is opening and letting air thru? SES is preventing me from passing Georgia emissions :(
P2096 is POST cat bank 1 o2. On these cars the post cat o2 sensors also take part in determining fuel trims. In this case the sensor is reporting that things are too lean on that bank too often. You need a scan tool with liva data to be able to diagnose this for sure. It could be a lazy o2 sensor that is reading lean when it shouldn't be or it could be a failed catalytic converter not doing its job and reading somewhat constant rich.
Odd that you mention the Post O2 sensor because at the start of my issues I got a P0141 O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2. I replaced that O2 sensor. P0141 was gone but then I got P0491 which I explained in previous post.
Aha, okay, my guess is you didn't tighten the O2 sensor enough and now a little air is leaking in (had this happen before with this code). Check that out.
I was able to tighten the O2 sensor almost a quarter turn BUT now I have P0155 O2 Heater Circuit Malfunction (Bank 2 Sensor 1)?????? as well as P2096. :( HO2s Monitor did set but none of the others. I will try and get someone to run scan on the sensors hopefully this week.
Hi mate I'm a Chilean living in new Zealand and I have my bmw 316ti 2003 and I have to change the oxygen sensor heater before cat and oxygen sensor before cat .. and I want to know if this video it's the right for me .. thanks mate
gilberto bernal Doesn’t matter.. both are the same.. just make sure you put the connectors on the right sensor.. thats why he does them one at a time..
Love your insight and video but for the love of god use more lighting. This o2 video was like watching you reach into the darkness and pull sensors out
You are incredible.
Thank you so much for helping all of us with e46’s.
My is a 2000 e46, 328-M52tu engine.
Thank you again for all you have done for me.
You should be a BMW head Mgr. in any BMW Dealer.
Thank you. Tonio.
NOT all of us with e46's.
this guide only applies to about 20% of E46's. dude doesnt know what he's talking about, there are over a dozen different engines in E46's, most of which have different o2 sensor setups.
Both sensor are the same or there are different?
So thatsssss what that round thing is lol I've been trying to figure out
I have the M56 engine in my 2005 325i which required the Bosch Parts # 17175 and 17176 sensors. The replacement process will require the removal of the engine cover and air pump for best access. The cords go around the rear of the engine and up onto the top (under engine cover) where they connect. This is also a good time to inspect the stiff vacuum line running around the back of the engine, it shares the harnesses holding the O2 sensor wires in a couple of places. Mine was very brittle and broke during the sensor replacement. Hope this helps someone out there, I ordered the sensors in this video only to discover they were completely different when I attempted their install the first time.
Are those upstream or downstream ?
Upstream lol
Both versions of the 0² socket are at Harbor Freight. I got the one he recommended against anyway and it worked fine on my E46 0² sensors using my 1/2” breaker. You have more than 30 days to return it at Harbor Freight even if it did fail
love watching those e46 videos!
Does it matter which way the plug goes in? Because the wires can be flipped upside down and still plug in.
this video no longer plays? Keeps giving "An error occurred. Please try again later. (Playback ID: sHSLfnxJr_WF8F8D)"
Just a heads up!
Some of the comments are wrong on here as far as the sensors being the same part numbers. According to my research and I have an 325I M54 engine, the part numbers are DIFFERENT and are as follows:
Bosch 17216 - bank 2 (4-6) Back
Bosch 17215 - bank 1 (1-3) Front
Or
Bmw Part numbers:
11787523435 - cylinders 4-6
11787523434 - cylinders 1-3
also differs for the m56 engine
So i'm kinda confused here. I am at rockauto and wanted to get a bosch and theyre saying both bank 1 and bank 2 sensor can use same o2 sensor... is that true ?? or do i have to make sure to buy different o2 sensors ?
which is bank 1 and bank 2
That's HOW!! 4 NOW!! Bank 2 is the cylinders 4,5&6 Bank 1 is cylinders 1,2&3
Is it gonna increase my gasoline consumption if this oxygen sensor not working ? Hope u understand what i am asking. :D
I'm getting only a P0174 code no 0171 so system lean bank 2
could it be a bad o2 sensor? or a vaccuum leak? which one is more likely
Vacuum leak I guess. Make sure your CCV system is functioning correctly, 50skid has got some videos of that system
Did you solve it ? If yes, what was the issue ?
"Reposition in order to get something off. "
Statureman Phrasing!
I'm getting playback issues on this video..
which is the bank 1 sensor 1
The one closest to the front of the car
My 02 sensor wires were just damaged and now I have the Trans Limp mode, could this be the cause? Can they be spliced ?
It was the front one, is that Bank 1 sensor 1?
50skid ,I have 2001 330i ,I have a code p0134 a this a bad sensor?
Hey there 50skid. Thank you for all your videos. I am a new owner of a e46 2001 300i. I knew absolutely nothing about BMW's until I found your videos. My question is this.... Do you have a video on replacing the after cat o2 sensors?? I couldn't find anything in your video library. If not do you think you will be making one? Thanks again for all the great info.
I don't have that one just yet. I usually don't make videos on replacing parts until I actually need to replace them, you know? And replacing those is a $100 thing. Every penny is currently being spent on accumulating parts and tools for my upcoming engine rebuild.
50sKid Hey there. Thanks for the reply. I totally understand where your coming from. I know those darn things aren't cheap unless you go with the cheap China knock offs. I guess I was more interested in the locations of them and how difficult it would be to DIY it. I just bought my car about a month ago and am learning a lot from you. I've pretty much watched every video you've done. You do a great job and I thank you for all your knowledge your sharing with all of us. Please keep it up!! 😊😊😊
P1449 P0171 P2240. Any ideas on where to start?
Can this cause p2240 code?
Thanks so much for creating these amazing tutorials on BMW's really helpful you have saved me a lot of bucks just following your DIY, thanks once again.
So the pre cat sensors are the same or matching pair so as the post cast ones as well when you are buying?
Does anyone know the OEM for the pre-cat O2 sensor?
ANyone know? The manual says on M54 the sensors should be replaced at 100k. Would you do this or just wait until they fail?
Also it says the whole exhaust system has to come off for the post cat ones??/
"Replacement of oxygen sensors at the
specified intervals ensures that the
engine and emission control system
will continue to operate as designed.
Extending the replacement interval
may void the emission control warranty
coverage."
it's the first 3 cylinders it's that one
Kikin Ramirez Yes. Sensor one is the sensor next to cyclinder one. (1-3).
Are both sensors exactly the same?
What’s the size of that socket bud?
They're both the same right? The 02 sensors. I wouldn't need to get a different type for either?
they are the same
My 2004 330ci doesn’t have that plug above it I have to take my engine covers off to get the o2 sensor out
I have a 2000 bmw 328i standerd sedan & im wondering if there are the upstrem sensors ? & if so are they both the same ??& in the other vid about the post cat sensors , are thos the downstream o2 sensors ?? Please respond !! & love ur Vids!! Very useful.
These*
The precat are the upstream sensors, postcat are downstream
Hi, does replacement for these pre cat sensors could fix this error? Bmw e46 2001 325i exhaust gas sensor bank 2 sensor 1 failed error p0135
Thanks for the videos. Got a P0171 code and just replaced my CCV and didn't go away. Watching you vids I think its most likely a Pre-Cat O2 sensor. Especially since I don't have the P0174 to go along with it. Thanks again all your videos have been helpful over the years!!!
did it take away the code?
@@almontelouie Yes it was an 02 sensor
Did u do the ccv yourself
@@RandomRubio Yes watching these video step by step. I was able to do it without removing the intake manifold. Hardest part was going from the top to remove lower intake boot. The clamp is on the bottom and hard to access from the top if it has never been done.
What would it be if it was both p0171 AND p0174 codes? I’m thinking of getting all 4 sensors replaced just to be safe but I just want like clarification.
seems like a pretty straightforward DIY, I've been watching a LOT of your videos... best e46 series I've found. Bank 1 Sensor 1 is probably the first one you changed here, right? Mine is throwing a code, I think it's time to replace.
Can you reference how to test an O2 sensor? I have a multimeter and a desire to learn, I'm just not having a ton of luck finding an answer.
What code are you getting? You CAN test to see if an O2 sensor is functioning by unplugging it (it's okay to run the car when it's unplugged) and connecting the leads from a multimeter (set to DC voltage mode in the 2 volt range) to the black and white wires (the grey wires are for the heater). If the sensor is working, you should see the voltage switching between ~0.1 volts and ~0.9 volts. However, this isn't the best, most definitive test for whether an O2 sensor is working, because if you have an exhaust leak or a vacuum leak somewhere before the sensor that is letting oxygen into the system, that will skew the results.
+50sKid sorry for the delay, had to wait for the codes to come back since I cleared them. I currently have p0130 (o2 sensor bank 1 sensor 1), p0134 (no activity at o2 sensor circuit bank 1 sensor 1) and p1421(secondary air?)
I plan on going through your vacuum line video but I'm a weekend warrior learning slowly amidst my two young kids and full time job... I've got a lot of work ahead of me, I'm sure.
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
I did this today I couldn't get any of these socket but found crow foot sockets
(idk what they are called in the states im from aus)
But they worked amazing just found it hard to unclipped it
What year is this BMW? I saw another video and he took the valve covers off in order to disconnect the sensor cables, whereas yours are close to the actual sensors. I have a 2000 e46 328CI, with 134k miles. Also, I would assume it's best to replace both, if you're going to do one, yes?
Question: can you use the elongated socket to change out the O2 sensors past the cat, or do you need the other socket?
The elongated socket will work
Elongated is the most convenient.
Thanks for the help!!
Next time could you show the product in detail so i can order the exact same one?
Thank you for your work!
Always the best DIY , Hey bro Today I got the P2240 B2S1 ! I swiped it with B1S1 still haven't get the code yet , but from Your experience could it be an O2 sensor, fuel sys or DME need an update, 2004 330ci.
You have a wiring problem to the O2 sensor. Not the two grey wires, it'll be the white or black wire (I forget which one is the ground in this case). Anyway, check the entire wiring harness to find the break in the wire and repair it.
If you don't find a broken wire then the sensor is bad internally.
This been about a day since I swapped them , I'm pretty sure the ses will get back after 100 miles or so ,but I'll let You know about any updates.
You mean the O2 sensor wire ? or the entire wiring harness?
50sKid Thanks a lot bro lets hope the ses won't come on 😄
50sKid Alright bro , remember when I swapped the O2 sensors? I kept them that way, now after 700 miles and today I noticed a surging idle , codes are P0171 , P0174 , P0440 😠😠
BTW I forget to mention from the beginning that I used to get the " check gas cap " light every once in awhile.
I was gifted a 01 330i the 1st sensor of mine has the wire and connection point for the 02 sensor is fried it was left sitting on the headers so now I can’t connect a new 02 sensor any videos on replacing the connector
I have a 328 M52TU w/code P1477. I was told sometimes the oxygen sensor gives out resulting in 1477?
My 325i spent a few months running rich because of an unregulated fuel pump (replaced filter/reg) - is it worth renewing my front O2 sensors in case of fouling?
What are the precat 02 sensor part numbers for bosch? I have '05 325i e46 m54 engine. Varying answers online. Thanks.
I m having an o2 sensor issue. I disconnected the sensor. the wire in the connecter was pushed back on two wires. I pulled them out to spread the little tabs. I did not mark the location of each wire. so I went to check the other sensor and when i pulled to unplug all the wires pulled out of the connector completely . can anyone tell me from the sensor to the plug wiring. 2000 e46 330i bank 1 and 2 sensor 1. this is the first of the 330's and the 1 sensors are at the end of the header and the 2 sensor is under the rear footwell
@50skid I am trying to find out what type of sensor I need. What is written on the box please. I can't seen to get a straight answer. So i can order a pair. Thanks for the help.
Hello. After replacing the oxygen sensors, do you have to put the computer to program? Well, I had turned on the check engine and after replacing them the check engine turned on again.
Thank you you are Graig on the bmw you know everything and work easy for you thanks for u inf
Hey's 50s kid love the videos, been a fan long time, but there is the silly question of are these upstream or down? thanks in advance
I’m getting code p0154 I follow this right? Can you link to the o2 sensors?
Hey man I have a 325i 2003 Bmw and it’s giving me a p0175 code
Do I replace the sensor your replacing in this video?
Thank you again........you are awesome! question? my E46 2003 heaters are not working. do you have any advice for me?
Hello. What is P0130 in n46 engine. I only clean the lambda but still check engine
I dont know if the question has been asked but why did you go with Bosch v NGK?
What size tool do you need? I'm bout to take mine.off but I'm borrowing tools from my boss
Thank you for video, both the sensors are the same length and type or different,
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
Did u ever get it fixed? I have to replace mine too.
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
Was there a heat shield in the way of yours? My 2002 M3 has a giant heat shield that has taken several hours to loosen, and still blocks the o2 sensor.
I did it with out taking out the air pump ona 2001 330ci
I originally had a 492 code. I ended up replacing dried up lines on the air relay switch behind the manifold under the cabinet filter assembly. One hose wasn't even on and the other was cracked . After doing this and clearing the codes I drove my 2002 bmw 325i wagon about 25 miles and the check engine light came on again. However, the code is now 0430 low threshold bank 2. Any idea what might have cause this. I thought maybe as I looked at your video and seeing the sensors where in the same location as the secondary intake valve line the might be a connection
De quel côté et la sonde lambda . 1 pour 330i E46 ? Merci
Hi, i watched your video but i am curios , are the post cat and the pre-cat sensors identical? do you know the part number for the pre-cat? i've noticed you've put it in the description in the post cat video. Good job with these videos, they are very helpful, thank you!
Cheers.
Do you recommend the car being cold upon removal?
Are the connectors the same? The longer one goes to the front one and short one to the back?
@50skid, when these o2 sensors go bad will they blow a fuse in the e box? Please help. Thanks in advance.
Did u get yours fixed? I keep blowing my Trans fuse & think its due to bad o2 wires?
Just got a P2231 code on my '04 325i, great video as always! Should be the same procedure, I'd imagine?
U talked too much for a simple job!
Hey Kid! What's going on with you?
Ik I’m late but where do I buy the sensor’s
Would you recommend removing these o2 sensors and spraying a type of cat cleaner inside them into the manifold in order to the catalytic converter?
Nice use of the drill. Milwaukee would be upset though
Can Bad O2 sensors cause Limp Mode if a O2 Sensor wire is melted? Getting Code 58 CAN: Open Circuit to AGS.
Did u ever find out? I have that issue too.
Thanks again for good video. I have similar tool but it made by Kamasa tools. It was great for replacing precat oxygen sensors.
Hey, I was wondering if anyone knew what the part number is or what you call the wire you plug the o2 sensor into. It's the wires between the o2 sensor and the harness.
Did u ever find out? I need one. :)
Is the post and pre cat sensors the same ?,
Bmw e46 316TI 2004 have 4x sonda lambda?
I change mine but why theres a smoke
hey i really need help with my 2005 x3 my car got no power when i step on the gas and when i go up the hill it wont make it do you know what wrong with my car?
Did you find out what was causing that?
Hey thank you for the great information. I've seen a few other videos on doing this job and you're the first one that told us to put the anti seize on the threads. Good to know. But I'm wondering if there's a trick or some way to get the other end of them off. I see that there are some little tabs on the plastic connectors but i don't really see any special way of undoing them. I see in other vids that they seem to just pull them apart. Is that it? Just grip and pull as hard as needed to get them off? (Holding them in the right place of course). I don't want to break them or rip out something while doing it. Thanks again.
Great video! Always enjoying your DIY videos!
Really enjoy your videos! Here’s a question for anyone including 50’s kid. I just replaced pre car sensors on my 02 325i but I’m getting the same codes P349,1351 and 1353 in cylinders 4,5,6 and misfire symptoms. I’m thinking it might be the oxygen sensor wire harness. BMW is telling me they don’t sell the wire harness and I’d have to buy new harness connectors (ends only) and make a new harness myself buy buying same gauge wire. Anyone have any experience with replacing the oxygen sensor wire harness?
Did you figure this out yet?
acxel rose yes and no. The issue stopped after I unplugged the oxygen sensors from wire harness and cleaned connectors. I think I was either getting same codes because of a bad connection or codes hadn’t cleared yet. Either way codes and misfires are all gone
Which one is sensor one and sensor 2 ????
what is part number?
Hey man, for those wrenches to remove the oxygen sensors, are they a particular size?
22mm
So for bank 2 is that sensor 1?
look like a 40s kid
Im getting Codes P0171 and P0174 on both my E46 and my E60. Ive done the smoke test and see no vacuum leaks at all. Can the O2 sensors be the issue?
I got the same problem
I bought eBay headers for my e46I know I would have a check engine light on but could I just run it with no O2 sensors and all four of the holes capped
Don’t cap your primaries they’re for a/f ratios
Plug in your 2 upstream ones you don't need your downstream ones, I have headers as well, you need the upstream to adjust AF ratio
Are both censer the same ...? For bank one and bank two
For Upstreams
Does the sensor give an error code when it's faulty got a maf code but got a new one and the code is still there vacume leak or could this sensor be the culprit?
What is the code that you are getting?
actually just got a pre cat o2 heat sensor code so looks like i do have to replace it
Will it be similar on 2002 e46?
david rivera yes
Hey, which drill is that, that your using, seems really handy and I want to start doing more work on my E46. What's that name and model of that drill?
I drive a 2002 530i. I had P0491 (Secondary Air Injection
System Insufficient Flow Bank 1). I replaced Air Valve but could not get SAS
monitor to set. Next I replaced Bank 1 Pre Cat O2 sensor, P0491 code gone and
SAS monitor set at FIRST cold start up(after idle 2.5 minutes), BUT I got P2096
(Post Catalyst Fuel Trim System Too Lean Bank 1) (but at least all monitors
would set after running 1 drive cycle). Unfortunately I left the wire that
plugged into the sensor laying on the manifold and the wires melted I got P0172 and
P0132) after repairing, these codes are gone, but I STILL have P2096 and no
monitors will set! So I'm back to trying to get SA monitor to set!!!!!!!!! Could
I be getting too much air now that the valve is opening and letting air
thru? SES is preventing me from passing Georgia emissions :(
P2096 is POST cat bank 1 o2. On these cars the post cat o2 sensors also take part in determining fuel trims. In this case the sensor is reporting that things are too lean on that bank too often. You need a scan tool with liva data to be able to diagnose this for sure. It could be a lazy o2 sensor that is reading lean when it shouldn't be or it could be a failed catalytic converter not doing its job and reading somewhat constant rich.
Odd that you mention the Post O2 sensor because at the start of my issues I got a P0141 O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2. I replaced that O2 sensor. P0141 was gone but then I got P0491 which I explained in previous post.
Aha, okay, my guess is you didn't tighten the O2 sensor enough and now a little air is leaking in (had this happen before with this code). Check that out.
The P0491 is completely separate and has nothing to do with this
I was able to tighten the O2 sensor almost a quarter turn BUT now I have P0155 O2 Heater Circuit Malfunction (Bank 2 Sensor 1)?????? as well as P2096. :( HO2s Monitor did set but none of the others. I will try and get someone to run scan on the sensors hopefully this week.
Hi mate I'm a Chilean living in new Zealand and I have my bmw 316ti 2003 and I have to change the oxygen sensor heater before cat and oxygen sensor before cat .. and I want to know if this video it's the right for me .. thanks mate
At least tell us the size of the socket?
All modern O2 sensors are the same--7/8" or 22mm
Does the M56 use the same sensors?
No, different connectors
How can i know which sensor goes where
gilberto bernal Doesn’t matter.. both are the same.. just make sure you put the connectors on the right sensor.. thats why he does them one at a time..
Is it the same for an e46 m3?
I don't think the connectors are located in the same place, but yeah an O2 sensor is an O2 sensor--they screw in the same way
Love your insight and video but for the love of god use more lighting. This o2 video was like watching you reach into the darkness and pull sensors out
Do you need o2 sensor?
You will have a cel light but you can drive without it, your car will run rich though and will get bad gas mileage