[TylerShubert24]

Quick question which o2 sensor/s are bank 1 or have to do with cylinder 1,2,3 . A little confused if someone could help that would be helpful.

[gbalthrop]

O2 Sensors are NOT often related to "Misfire" which is most often an issue with coils, plugs, injectors, or associated wiring/ connectors. I would suggest posting a full description of symptoms, Warning Lights, and Fault Codes, including any Scan Tool or Diagnostic Software you have available.

TIS Online Service Manual (newTIS.info) has "Installation Location" diagrams for most every component in your vehicle, and I would suggest taking the time to learn what info is in TIS and how to access it.

Here are TIS Installation Location for O2 Sensors on your N54 Engine. The component numbers used for Bank 1 or cylinder 1,2,3 O2 Sensors are:
Bank 1 Pre-cat O2 Sensor (BEFORE Catalytic Converter on front exhaust manifold) = B62101
Bank 1 Post-cat O2 Sensor (AFTER Catalytic Converter) = B62102
https://www.newtis.info/tisv2/a/en/e90-335i-lim/SHRnn4K
https://www.newtis.info/tisv2/a/en/e...lim/1VnXZllGMM

George

[TylerShubert24]

Originally Posted by gbalthrop

O2 Sensors are NOT often related to "Misfire" which is most often an issue with coils, plugs, injectors, or associated wiring/ connectors. I would suggest posting a full description of symptoms, Warning Lights, and Fault Codes, including any Scan Tool or Diagnostic Software you have available.

TIS Online Service Manual (newTIS.info) has "Installation Location" diagrams for most every component in your vehicle, and I would suggest taking the time to learn what info is in TIS and how to access it.

Here are TIS Installation Location for O2 Sensors on your N54 Engine. The component numbers used for Bank 1 or cylinder 1,2,3 O2 Sensors are:
Bank 1 Pre-cat O2 Sensor (BEFORE Catalytic Converter on front exhaust manifold) = B62101
Bank 1 Post-cat O2 Sensor (AFTER Catalytic Converter) = B62102
https://www.newtis.info/tisv2/a/en/e90-335i-lim/SHRnn4K
https://www.newtis.info/tisv2/a/en/e...lim/1VnXZllGMM

George

Not really trying to fix the misfire right this second but I'm almost positive it's injectors which are already on the way (also got new plugs and coils) I just wanted to know if the injectors doesn't fix my problem what o2s are associated with cylinders 123. Thank you for the help George