Support efficient fuel combustion and powerful engine performance: Bosch air mass meters measure the actual air-mass flow and transmit these readings to the ECU. Functionally and quality tested in accordance with the same standards as for original equipment parts: for high performance and reliability over a long service life Specially developed micromechanical sensor element design: for precise measurement High quality materials and a robust design: for excellent resistance to deformation, cracking and fractures Bosch air mass meters are also available as Bosch eXchange products: for a value-based vehicle repair.