Mass Air Flow Sensor What this part does - Accurately measures the volume of air entering the engine so the engine control unit can set the correct air/fuel ratio. - Restores proper fueling and engine management when a failing sensor causes rough idle, hesitation, stalling, or increased fuel use. Key benefits - Reliable engine performance: Helps return smooth idle, steady acceleration, and consistent throttle response by providing correct airflow data. - Fuel economy and emissions: Supports more accurate fuel delivery to help reduce excess fuel consumption and emissions caused by faulty airflow readings. - Direct-fit replacement: Designed to match the form and function required by the specified Subaru models for an easy swap into the factory intake system. - Single-unit package: Includes 1 x Mass Air Flow Sensor, ready for immediate installation. Important attributes - Function: Mass air flow measurement for engine management. - Compatibility: - SUBARU FORESTER 1998 - SUBARU IMPREZA 1993-1998 - SUBARU LEGACY 1990-1999 - Performance: Restores accurate airflow signals to the vehicle’s engine control system for consistent operation. - Construction: Engineered for durable performance in the intake environment and to meet the fitment needs of the listed models. Practical use scenarios - Replace a failed MAF after diagnosis when the vehicle shows rough idle, stalling, or a check engine light related to airflow or fuel trim codes. - Install during an engine rebuild or intake maintenance to ensure the engine control unit receives accurate airflow data from a new or refreshed intake system. - Keep as a service part for fleet or frequent-use vehicles of the listed Subaru models to minimize downtime from air-measurement failures. Package contents - 1 x Mass Air Flow Sensor Support - If you need any assistance or have questions, please do not hesitate to contact us. We provide the information you need to make a confident purchase and offer ongoing support after your purchase.