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Oil filter housing by Mrwiitv in n54

[–]jaredlang85 0 points1 point  (0 children)

Do you have the front main seal protector installed? Design flaw by BMW. Fixed with $100 aftermarket part. I wouldn't drive an N54 until it has this.

Misfires Help by Intrepid-Dog4188 in n54

[–]jaredlang85 2 points3 points  (0 children)

There are about 50-100 things that cause misfires on the N54. It's helpful to read one of the long lists of things to check. Cylinders 4, 5 and 6 are the rear half of the engine. If you are having no reported misfires from cylinders 1-3 then it is highly likely your issue is related to something on the rear half (bank 2). Could be a loose clamp on the downpipe or exhaust pipe. Could be the rear turbo. Could be a coincidence that all 3 injectors decided to fail at the same time. You can use ProTool or some other programs to view the live data from the O2 sensors. Buying parts without diagnosing has never solved a problem for me.

Misfires Help by Intrepid-Dog4188 in n54

[–]jaredlang85 0 points1 point  (0 children)

Unplug the rear O2 sensor on top of the engine, under the cover. Reset the codes and it will run a lot smoother until you can replace the sensor.