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Why is it going to matter if the MAF sensor is in backwards??

Does it not only read air passing over the hotwire??

Will air not still be passing over the hotwire??

The MAF sesor doesn't know its installed backwards, its still passing the same ammount of air over the surface.

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Why is it going to matter if the MAF sensor is in backwards??

Does it not only read air passing over the hotwire??

Will air not still be passing over the hotwire??

The MAF sesor doesn't know its installed backwards, its still passing the same ammount of air over the surface.

Not 100% entirely correct... If you look at the AFM housing it is not mirrored so there will be a flow difference both ways, but your definately on the right track, it is just airflow over a wire.

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The bosch z32 i have actually has the flow direction on it. A little arrow pointing ----->

That is to help mechanics that don't a clue. The direction of flow should be obvious to most people who have a clue, but it will still show a reading which ever way it is mounted.

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