Standard Motor Products AS27 Manifold Absolute Pressure MAP Sensor

The Standard Motor Products AS27 is a direct-fit replacement Manifold Absolute Pressure (MAP) sensor, also known as a BAP (Barometric Absolute Pressure) sensor. Designed to restore proper engine management function, this sensor delivers the accurate pressure readings your vehicle's powertrain control module (PCM) depends on for optimal performance.

How It Works:

The MAP sensor continuously monitors intake manifold vacuum and pressure, converting that data into a precise voltage or frequency signal. The PCM uses this input to calculate engine load, allowing it to adjust ignition timing and fuel delivery accordingly. On speed-density fuel injection systems, the MAP sensor also assists the PCM in estimating airflow into the engine.

Key Features:

• Direct OEM replacement — restores factory sensor performance
• Accurately produces voltage or frequency output as manifold pressure changes
• Supports ignition timing advance and retard functions
• Aids PCM in airflow estimation on speed-density fuel injection systems
• Sold individually; wiring harness not included

Symptoms of a Failing MAP Sensor:

• Intermittent or persistent check engine light
• Hesitation or stumbling during acceleration
• Elevated exhaust emissions
• Reduced engine performance or fuel economy

Standard Motor Products has been a trusted name in OE-quality replacement sensors for decades. The AS27 meets or exceeds original equipment specifications, making it a reliable choice for restoring accurate engine management to your vehicle.