My '06 x5 having this same issue. Again, great video. I am so tempted to try this on my own but I am not as knowledgeable as you are with cars. But man you make it look easy. Thanks again.
I replaced my pre-cats but I can't get under my car myself to change the post cats. I've heard that you don't really need to change the post cats until they fail because all they do is measure emissions. My question is what's the worst possible downside for not changing them?
Richard thanks for the video! The access to the rear oxygen sensors on my BMW E39 2001 looks like it was designed by engineers that don't like DIY Mechanics. Access is very limited...have tried PB blaster to loosen sensors...oxygen sensor removal sockets (seem to flex quite a bit). Have read some comments about heating the sensor with a map torch...which I don't have but do have a regular propane torch. Any suggestions by you or your readers would be much appreciated!!! Photo link www.pixhometours.com/BMW-E39/i-5Scc5JZ/A
Removed exhaust system at the catalytic converter this gave me enough room to access and remove the rear oxygen sensors. Working on drive cycle so I can pass smog...have a pending code P0441...will continue drive cycle and hopefully it will go away. I have replaced the gas cap, purge valve and now the rear oxygen sensors...front sensors had been replaced previously. Indy ran smoke test and says no leaks...
The oxygen sensors change a little bit in 2002-2003. The later model sensors are more sophisticated. So order the ones that fit your application. May have to check your vin for production date to get the right ones.
Currently has a P1093. There are many confirmed fixes on the forums that this is related to a dead bank 2 post catalyst oxygen sensor. It makes sense, so I tried it. Code came right back.
I've got code P1155 (along with a load of misfires) - bank 2, sensor 2. Changing both of these soon; mileage has just gone over 80,000, so the time is right anyway.
JMUDoc it’s not likely. How old are the coils and plugs? At the very least you should replace the plugs they’re only $35. Find out how old the coil packs are
Put your exact model into the Amazon garage and it will verify fit for you! I believe the only differences may be in length of the wire between models.
Interesting video. If my O2 sensors fail I might even attempt changing them now that I have seen this. Except for two things: what kind of grease did you put on that sensor and how did you proceed without a torque wrench and torque specification. I'm a newbie hobby mechanic - trying to figure it all out. Which leads me to another question - for a newbie like me, would you recommend something like the Bentley manual ? Does it explain the details that may be obvious to the experienced but are new to people like me ? Thanks.
The pre-cat sensors are much easier to change, and are more important than the post-cat sensors as they affect how the engine runs. The new Bosch sensors come with a dab of anti-seize on the threads, which is protected with a plastic cap until you remove it to install the sensor. You can torque these, but tightening it down snug usually does the trick. You kind of learn how tight to go after years of wrenching on cars. Definitely pick up a Bentley manual! They are a great resource.
BIMMER ZEIT Thanks for the info and advice. My Bentley manual is arriving today in the mail. Exciting. I just bought a 10-year old X3 with about 92000 mi on it - it seems in good shape but I'm really motivated to apply preventative maintenance to bolster the vehicle's health and longevity. I started with changing all fluids (oil, steering, coolant, transfer case, differential) now waiting for transmission oil and filter and spark plugs to arrive in the mail. Then I have to decide what next. Do you recommend changing O2 sensors proactively ? Or should I wait for the engine codes to roll in so I don't waste money replacing items unnecessarily ? Also I saw your nice video on cleaning the idle air control valve and another on the transfer case actuator motor gear. I'm also thinking of doing those things as preventative maintenance. What are your thoughts ? Is that approach over the top ? Thx.
Congrats on the new acquisition! Sounds like you have a great start. I have spoken to some master techs at BMW as well as a well respected transmission shop about these transmissions - they do not recommend changing the fluid unless it is showing signs of trouble. What happens is there will be old fluid stuck in the torque converter - it will mix with new fluid and this can cause issues with the transmissions. There are two schools of thought on it - so I would avoid the transmission service until you research the potential pros and cons more. Go ahead and swap the pre-cat O2 sensors if they are original with 92k on them, it may give you a very small bump in mileage.
Thanks for the info. Very helpful. I have been researching it and I'm still not sure which way I'll go. I found some info that helped me to understand the issues that you mentioned can arise after a fluid change. Fascinating. I had no idea but it totally makes sense - this is what I understand so far: if the current state of the transmission is super gunky then new oil will can that gunk into solution, get it moving, and can lead to clogging in the small channels of the valve body. Other potential problem is with suspended particles of clutch material. If the clutch plates are worn, then there can be suspended particles of clutch material in the fluid. The normal friction offered by fluid pressure between the clutch plates is augmented by the suspended particles to allow worn clutch plates enough friction to operate properly. If the suspended particles are removed (by changing the oil) then the worn clutch plates may not have enough friction by the fluid pressure alone to do their job. I had no idea of any of that but thanks to your comments I looked into it. I'm going to check the state of my transmission oil this weekend and make a decision. Thanks again.
New post-cat oxygen sensors: amzn.to/2cAUZeH
New pre-cat oxygen sensors: amzn.to/2cAVipZ
Oxygen sensor socket tool: amzn.to/2cuDgHo
My '06 x5 having this same issue. Again, great video. I am so tempted to try this on my own but I am not as knowledgeable as you are with cars. But man you make it look easy. Thanks again.
Bonjour quel était votre problème sur votre bmw . Pour avoir changé la sonde lambda merci beaucoup
This helped me locate aft (cat) O2 sensors on a 2004 x3 E83. Ty! wrench and tool specs are helpful
I replaced my pre-cats but I can't get under my car myself to change the post cats. I've heard that you don't really need to change the post cats until they fail because all they do is measure emissions. My question is what's the worst possible downside for not changing them?
these are the down stream o2 sensors?? precat is just a second name for them right?
nice clear video and explanation..saw so many videos and all were confusing as f***
these are bank 2 sensor 1 and sensor 2 not bank 1
Richard thanks for the video! The access to the rear oxygen sensors on my BMW E39 2001 looks like it was designed by engineers that don't like DIY Mechanics. Access is very limited...have tried PB blaster to loosen sensors...oxygen sensor removal sockets (seem to flex quite a bit). Have read some comments about heating the sensor with a map torch...which I don't have but do have a regular propane torch. Any suggestions by you or your readers would be much appreciated!!! Photo link www.pixhometours.com/BMW-E39/i-5Scc5JZ/A
Removed exhaust system at the catalytic converter this gave me enough room to access and remove the rear oxygen sensors. Working on drive cycle so I can pass smog...have a pending code P0441...will continue drive cycle and hopefully it will go away. I have replaced the gas cap, purge valve and now the rear oxygen sensors...front sensors had been replaced previously. Indy ran smoke test and says no leaks...
Hello, i have a E39 520i m54 with P1137 code. Which one i have to change? Thanks
Wow 520i you must be european
How many oxygen sensor the x5 2006 has?
Two before the cat converters and two after; that makes four total
is the sensor tool universal or bmw specific
BMW specific
Nice work bro. I have a P0141 02 sensor heater circuit (Bank 1 Sensor 2) now
I know which it is. Tx
bank 1 = up stream sensors bank2 = down stream sensors
@@ZAKU-GD That is totally wrong. Sensor 1= up stream sensors(also called precat) sensor2 = down stream sensors(postcat)
Why does it say it on amazon it doesn’t fit a 2003 BMW X5?
The oxygen sensors change a little bit in 2002-2003. The later model sensors are more sophisticated. So order the ones that fit your application. May have to check your vin for production date to get the right ones.
@@BIMMERZEITT I just did and my model is 2003 x5 e53 30i so will these work for me?
What code or/and what issue made you change the O2 Sensor? What is the mileage on the X5?
Currently has a P1093. There are many confirmed fixes on the forums that this is related to a dead bank 2 post catalyst oxygen sensor. It makes sense, so I tried it. Code came right back.
BIMMER ZEIT I
Having the same issue on my X5 3.0 right know how did you fix it beside the o2 sensor
I've got code P1155 (along with a load of misfires) - bank 2, sensor 2.
Changing both of these soon; mileage has just gone over 80,000, so the time is right anyway.
Yep, change out those 02 sensors. Probably need spark plugs and coil packs too for the misfires.
@@BIMMERZEITT I'm the hoping the misfires are mixture-related - it's been down on power and the exhaust stinks of fuel.
JMUDoc it’s not likely. How old are the coils and plugs? At the very least you should replace the plugs they’re only $35. Find out how old the coil packs are
@@BIMMERZEITT It's a misfire across four (of six) cylinders, spanning both "banks" - four plug/coils failing all at once?
why only changing one?
Hey Alan, I replaced both pre-cat sensors on this car a week or so ago. Now replacing these post-cat sensors and just recorded the one being replaced.
Got it!
Good video thx
Roberto, thank you!
Question, both rear sensor are the same? part num. 15109
Put your exact model into the Amazon garage and it will verify fit for you! I believe the only differences may be in length of the wire between models.
oh thank wish you lots of Successes
Interesting video. If my O2 sensors fail I might even attempt changing them now that I have seen this. Except for two things: what kind of grease did you put on that sensor and how did you proceed without a torque wrench and torque specification. I'm a newbie hobby mechanic - trying to figure it all out. Which leads me to another question - for a newbie like me, would you recommend something like the Bentley manual ? Does it explain the details that may be obvious to the experienced but are new to people like me ? Thanks.
The pre-cat sensors are much easier to change, and are more important than the post-cat sensors as they affect how the engine runs. The new Bosch sensors come with a dab of anti-seize on the threads, which is protected with a plastic cap until you remove it to install the sensor. You can torque these, but tightening it down snug usually does the trick. You kind of learn how tight to go after years of wrenching on cars. Definitely pick up a Bentley manual! They are a great resource.
BIMMER ZEIT
Thanks for the info and advice. My Bentley manual is arriving today in the mail. Exciting. I just bought a 10-year old X3 with about 92000 mi on it - it seems in good shape but I'm really motivated to apply preventative maintenance to bolster the vehicle's health and longevity. I started with changing all fluids (oil, steering, coolant, transfer case, differential) now waiting for transmission oil and filter and spark plugs to arrive in the mail. Then I have to decide what next. Do you recommend changing O2 sensors proactively ? Or should I wait for the engine codes to roll in so I don't waste money replacing items unnecessarily ? Also I saw your nice video on cleaning the idle air control valve and another on the transfer case actuator motor gear. I'm also thinking of doing those things as preventative maintenance. What are your thoughts ? Is that approach over the top ? Thx.
Congrats on the new acquisition! Sounds like you have a great start. I have spoken to some master techs at BMW as well as a well respected transmission shop about these transmissions - they do not recommend changing the fluid unless it is showing signs of trouble. What happens is there will be old fluid stuck in the torque converter - it will mix with new fluid and this can cause issues with the transmissions. There are two schools of thought on it - so I would avoid the transmission service until you research the potential pros and cons more. Go ahead and swap the pre-cat O2 sensors if they are original with 92k on them, it may give you a very small bump in mileage.
Thanks for the info. Very helpful. I have been researching it and I'm still not sure which way I'll go. I found some info that helped me to understand the issues that you mentioned can arise after a fluid change. Fascinating. I had no idea but it totally makes sense - this is what I understand so far: if the current state of the transmission is super gunky then new oil will can that gunk into solution, get it moving, and can lead to clogging in the small channels of the valve body. Other potential problem is with suspended particles of clutch material. If the clutch plates are worn, then there can be suspended particles of clutch material in the fluid. The normal friction offered by fluid pressure between the clutch plates is augmented by the suspended particles to allow worn clutch plates enough friction to operate properly. If the suspended particles are removed (by changing the oil) then the worn clutch plates may not have enough friction by the fluid pressure alone to do their job. I had no idea of any of that but thanks to your comments I looked into it. I'm going to check the state of my transmission oil this weekend and make a decision. Thanks again.
Thanks for sharing that info! Yes, always proceed with caution when changing these "lifetime" fluids. Let me know how you make out with it!
wasn't that bank two sensor two you removed p/n was for bank 2 sensor 1