The Mass Air Flow (MAF) sensor is a vital component in modern engine management systems. It precisely measures the volume and density of air entering the engine, providing critical data to the Engine Control Unit (ECU). This accurate measurement allows the ECU to calculate the correct amount of fuel to inject for efficient combustion. A properly functioning MAF sensor ensures optimal engine performance, fuel economy, and reduced emissions. Symptoms of a failing MAF sensor can include rough idling, hesitation during acceleration, decreased fuel efficiency, and illuminated check engine lights. Replacing a faulty sensor with a quality part like this MAGNETI MARELLI unit can restore your vehicle's performance.