Description
This is a used original Siemens air mass sensor for BMW E36, E34 and E39 models. The primary OEM number is 1730033, with hardware reference 5WK9007. It is designed to measure the amount of intake air entering the engine so the management system can calculate fuel delivery accurately.
In normal operation, the air mass sensor sends a precise airflow signal to the engine control system. That data is essential for smooth idle, clean acceleration, correct fuel mixture and stable overall drivability across changing engine load and temperature conditions.
Common signs of a faulty unit include rough idle, hesitation on acceleration, poor throttle response, increased fuel consumption, hard starting and an engine warning light or mixture-related fault codes. A failing sensor can also cause uneven running or reduced power because the engine is no longer receiving a reliable airflow reading.
This is a used genuine part removed from a vehicle and tested before sale. Please match the exact OEM number 1730033 and hardware reference 5WK9007 before ordering. Professional installation is recommended to ensure correct diagnosis and fitment.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
