The Bosch Hot Film Mass Air Flow (MAF) Sensor, also called an air mass sensor or air flow meter, measures the amount of air entering the engine. It sends that data to the engine control unit (ECU) so the ECU can calculate fuel delivery for efficient combustion. Key Features: Hot film sensing element that measures intake air mass accurately Helps the ECU keep the air-fuel ratio correct for smooth running and good fuel economy Helps keep emissions within design targets Built as a direct-fit replacement for a failed or contaminated sensor Made by Bosch, an original equipment supplier to automakers worldwide Benefits: Can help restore throttle response and idle stability Can help resolve hesitation, stalling, rough idle, poor fuel economy and check engine light symptoms caused by a faulty MAF sensor Typically installs in the intake tract between the air filter and the throttle body, using basic hand tools Choose the child item that matches your application's part number for correct connector and housing configuration.