Standard Motor Products MAS0146 Mass Air Flow Sensor MAF

The Standard Motor Products MAS0146 is a new Mass Air Flow (MAF) sensor designed as a direct-fit replacement for select Subaru Legacy and Impreza applications. This sensor plays a critical role in engine management by precisely measuring the volume of air entering the intake, allowing the engine control module (ECM) to calculate and deliver the correct fuel injection quantity for optimal combustion efficiency.

Key Features:

• 100% new construction — never remanufactured, eliminating residual debris that can cause premature sensor failure
• Computer-tested to ensure the ECU receives accurate airflow readings under demanding engine conditions, supporting a correct air/fuel ratio and clean burns
• Hybrid electronic technology ensures reliable and durable internal circuitry
• No moving parts — wear-free design for extended sensor service life
• Metal and plastic construction with blade-style terminal connector
• Limited Lifetime Warranty backed by Standard Motor Products

Cross-Reference Part Numbers: MF21003, 22680AA160, 22680-AA160, MAF0096, 917801, 1581071, 2451128, 5S2861, SU5101, 74-10034, MA141

The MAS0146 is also sold under Standard Motor Products' Blue Streak Electronics (STD Standard Ignition) line. Replacing a failing MAF sensor can resolve common symptoms such as poor fuel economy, rough idle, engine hesitation, stalling, and diagnostic trouble codes P0100–P0103. This sensor installs using the original mounting points with no modification required.