BOSCH manufactured mass air flow sensor -

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Up for sale is a good working Airflow Meter that should fit several Euro model BMW cars - see your original part number.

As always its your best bet to match the part number with the original one in your car. This unit is from a recent crash damaged car.  This unit is an original manufacturer part!  Not aftermarket.  offers a 30 day warranty. This is a VERY hard to find part.  

A bad AMM can cause a lean running condition, loopy idle, no start, runs but has no power, random stalling, excess smoke, pinging, or any other strange running conditions.