Description
This Bosch air mass sensor is an original Mercedes unit for SLK, CLK and W210 models, supplied under primary OEM number A1120940048 and alternate number 0280217515. It is a key intake sensor used in the engine management system to measure the amount of air entering the engine with precision.
By sending accurate airflow data to the ECU, this sensor helps calculate the correct fuel delivery and supports stable idle, smooth acceleration, efficient combustion and proper emissions control. A healthy air mass sensor is important for consistent engine response and balanced performance across normal driving conditions.
Common signs of a faulty unit include rough idle, hesitation under throttle, poor fuel economy, weak acceleration, hard starting and an illuminated check engine light. In some cases, incorrect airflow readings can also cause an over-fuelling or under-fuelling condition that affects drivability.
This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number before ordering. Professional installation is recommended, and coding, programming or adaptation may be required where applicable for the vehicle system.
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/
