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The sixth generation of BMW's 3-Series cars, produced between 2011 and 2018.

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Where is the Nox sensor bank 1 sensor 1 located on my bmw 328d

I have an engine code for a bad nox sensor and if I could figure out where it is maybe I can just fix it myself.

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I'm not familiar with the 328d, but NOx is created in the engine therefore the sensor will be in the exhaust.


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The NOx sensor bank 1 sensor 1 for a BMW 328d is located on the manifold that serves cylinder 1, before the catalytic converter (CAT). The first three cylinders in a BMW are bank 1, and the second three are bank 2.

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Number 1 in the diagram.



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