I replaced the upstream sensors on my 128i because one of the heater coils had failed. This guide was super helpful! Removing the metal plate wasnt too hard even though I couldn't see them and had to go by feel.
BMW calls it a lambda bracket. So I don't know about shielding against any heat but they've connected the ground strap to it and having it fastened into the cylinder head with two aluminum bolts.... Kind of shows why people have electrical problems with it.
I've done N54 o2 sensors and fundamentally there's not much difference. Its relatively the same process (with aftermarket downpipes), the connectors (and their placement) are the same or very similar on top and bottom, for instance the top ones snake around the back of the engine the same way and clip on top of the intake manifold, they're colour coated the same way, and the bottom sensors connectors clip into the same area. The only difference with the N54 is the placement of the the sensor on the downpipes. On the pre-cat sensors for N54 they don't point straight up, they're at a bit of an angle as they are mounted on the downpipe vs the exhaust manifold on N52. If you have aftermarket downpipes, the bottom (post cat) sensors will be easier to change out as the post cat sensors are placed in such a way that you can get to them easily, but with the factory catted downpipes the placement is tucked away and you can't remove the sensor without removing the downpipe, you'll need to remove the downpipe which requires unbolting the turbo clamp, unbolting the downpipe from the cat-back, and then unbolting from the bracket that holds the downpipe in place (and bending it out of the way). You'll need 2 gaskets and maybe a new clamp and hardware to screw the downpipe back on.
Good day i got this codes on a Bmw x1 E84 but i dont know which oxygen to replace so far. Which one is before catalytic and which is after. My codes : Oxygen sensor before catalytic converter, plausibility Oxygen sensor before catalytic converter 2, plausibility EWS anti-tampering protection Oxygen sensor after catalytic converter, ageing Oxygen sensor after catalytic converter 2, ageing.
I guess its slightly different for the earlier production dates for the E90. My production date is april 2005 for my "2006" 330i. The upstream O2 sensors do not plug in on top of the valve cover near the fuel rail.
Someone help, please. I replaced my H7 AGM battery with a new H7 AGM battery. I charged my new battery once I got home from buying it, before installing the battery. I have a CTEK charger, so it’s a good charger. Prior to charging it my battery tester tested the new battery at 100% capacity and 857 CCA., so my point is it’s a healthy and strong battery. I removed the negative clamp from the old battery and placed a plastic lid I had between the negative post and the negative wire clamp to prevent continuity and sparking. I got the old battery removed. New battery installed. Did the battery registration with my Foxtech code reader. And did a software reset using the single odometer instrument reset button by going into the menu 21 settings. I drove without any codes for 3 miles. And then got P0136. Bank 1 Sensor 2 code with CEL. I used my OBDii reader and reset the codes. I drove half a mile and the P0136 returned! Is it more likely I fried a wiring harness? Or broke my O2 sensor? Or a simple coincident that the O2 sensor decided to break after changing a battery, which I doubt to be the case. Is there a fuse that blew that sends power to O2 sensor ? Thank you in advance. I’m upset and super concerned about an expensive wiring harness repair on a cheap car. 2011 E90 105k miles. My B1S2 is 0.410v and the graph is flat lined, remains at 0.410…B1S2 is 0.710 and its graph jumps around. I can’t figure out why a careful battery replacement would cause my P0136. Thank you. did put some Chevron fuel cleaner in the tank prior to the CEL!
Thank you for the N52 content 👍🏻
So there 2 downstream sensors and 2 upstream sensors
Excellent video. You made it fun for such a pain job
Fantastic ! Thanks my good coach !! 👊🏼 🔥
I replaced the upstream sensors on my 128i because one of the heater coils had failed. This guide was super helpful! Removing the metal plate wasnt too hard even though I couldn't see them and had to go by feel.
Really great demo. Would this be the same location and procedure for O2 sensors on a N43 318i? Thanks from the UK.
Those 2 small bolts for the heat shield on the upstream sensor are THE worst part of this job. Thanks for the great vid! Very helpful.
BMW calls it a lambda bracket. So I don't know about shielding against any heat but they've connected the ground strap to it and having it fastened into the cylinder head with two aluminum bolts.... Kind of shows why people have electrical problems with it.
Tell me about it, I had to try every which way for an hour just to get the things off
Got the code P114D and 2C7F. Is this bad after cat oxygen sensor or air is coming in somewhere after pre Cat Oxygen sensors?
Great video, learned a ton
So there are 4 Oxygen sensors? Had no idea there was that many. Oh and great job too!!
And 4 cats
How about a video on doing this on the N54 with twin turbos? Thanks.
I've done N54 o2 sensors and fundamentally there's not much difference. Its relatively the same process (with aftermarket downpipes), the connectors (and their placement) are the same or very similar on top and bottom, for instance the top ones snake around the back of the engine the same way and clip on top of the intake manifold, they're colour coated the same way, and the bottom sensors connectors clip into the same area.
The only difference with the N54 is the placement of the the sensor on the downpipes. On the pre-cat sensors for N54 they don't point straight up, they're at a bit of an angle as they are mounted on the downpipe vs the exhaust manifold on N52. If you have aftermarket downpipes, the bottom (post cat) sensors will be easier to change out as the post cat sensors are placed in such a way that you can get to them easily, but with the factory catted downpipes the placement is tucked away and you can't remove the sensor without removing the downpipe, you'll need to remove the downpipe which requires unbolting the turbo clamp, unbolting the downpipe from the cat-back, and then unbolting from the bracket that holds the downpipe in place (and bending it out of the way). You'll need 2 gaskets and maybe a new clamp and hardware to screw the downpipe back on.
Good day i got this codes on a Bmw x1 E84 but i dont know which oxygen to replace so far. Which one is before catalytic and which is after. My codes : Oxygen sensor before catalytic converter, plausibility
Oxygen sensor before catalytic converter 2, plausibility
EWS anti-tampering protection
Oxygen sensor after catalytic converter, ageing
Oxygen sensor after catalytic converter 2, ageing.
Its an N46 B20 engine thanks. So which once should I change after reading those codes
Thanks a lot, I do have e90 same engine, it’s really helpful…
I guess its slightly different for the earlier production dates for the E90. My production date is april 2005 for my "2006" 330i. The upstream O2 sensors do not plug in on top of the valve cover near the fuel rail.
Where do the plugs go to on yours?
I can confirm that my production dates are the same and it's not on the top of valve cover.
@@PiekniaczekZiemniak do you know where they plug in?
@@sevenstars0711 Like a location in a engine bay, or connector numbers?
@@PiekniaczekZiemniak their actual location in the engine bay
Someone help, please. I replaced my H7 AGM battery with a new H7 AGM battery. I charged my new battery once I got home from buying it, before installing the battery. I have a CTEK charger, so it’s a good charger. Prior to charging it my battery tester tested the new battery at 100% capacity and 857 CCA., so my point is it’s a healthy and strong battery. I removed the negative clamp from the old battery and placed a plastic lid I had between the negative post and the negative wire clamp to prevent continuity and sparking. I got the old battery removed. New battery installed. Did the battery registration with my Foxtech code reader. And did a software reset using the single odometer instrument reset button by going into the menu 21 settings. I drove without any codes for 3 miles. And then got P0136. Bank 1 Sensor 2 code with CEL. I used my OBDii reader and reset the codes. I drove half a mile and the P0136 returned! Is it more likely I fried a wiring harness? Or broke my O2 sensor? Or a simple coincident that the O2 sensor decided to break after changing a battery, which I doubt to be the case. Is there a fuse that blew that sends power to O2 sensor ? Thank you in advance. I’m upset and super concerned about an expensive wiring harness repair on a cheap car. 2011 E90 105k miles. My B1S2 is 0.410v and the graph is flat lined, remains at 0.410…B1S2 is 0.710 and its graph jumps around. I can’t figure out why a careful battery replacement would cause my P0136. Thank you. did put some Chevron fuel cleaner in the tank prior to the CEL!