Standard Motor Products AS739 Manifold Absolute Pressure MAP Sensor

The Standard Motor Products AS739 is a direct-fit replacement manifold absolute pressure (MAP) sensor designed for Subaru applications. This OE-quality sensor restores proper engine management function when your original sensor has become worn, damaged, or malfunctioning.

The MAP sensor plays a critical role in engine performance by continuously monitoring intake manifold pressure and converting those readings into an electrical signal for the powertrain control module (PCM). The PCM uses this data to precisely manage fuel delivery, ignition timing advance and retard, and overall engine load calculations. On speed-density fuel injection systems, the MAP sensor also assists the PCM in estimating airflow into the engine.

Key Features:

• Direct, high-quality replacement for the original manifold absolute pressure sensor
• Accurately produces voltage or frequency output as manifold pressure changes
• Supports ignition timing control and fuel delivery optimization
• Assists PCM with airflow estimation on speed-density fuel injection systems
• Sold individually; wiring harness not included
• UPC: 33086763088

A faulty MAP sensor can trigger an intermittent check engine light, cause hesitation during acceleration, increase emissions output, and degrade overall engine performance. Replacing it with the Standard Motor Products AS739 helps restore fuel efficiency and drivability to factory specifications.