Standard Ignition AS439 Manifold Absolute Pressure Sensor

Reliable Manifold Absolute Pressure Sensor for Audi Vehicles

The Standard Ignition AS439 Manifold Absolute Pressure Sensor is designed to provide accurate pressure readings for optimal engine performance. Compatible with various Audi models, this sensor helps maintain efficient fuel management and emission control.

• Compatible with Audi A4, A4 Quattro, A5, A5 Quattro, A6, A6 Quattro, allroad, Q5, and TT Quattro
• Measures manifold absolute pressure to support engine control systems
• Direct replacement part number AS439 for easy identification
• Ensures precise data for fuel injection and ignition timing adjustments
• Durable construction for consistent performance under varying conditions

Product Details and Functionality

The AS439 Manifold Absolute Pressure Sensor from Standard Ignition is engineered to monitor the pressure inside the intake manifold of compatible Audi vehicles. By accurately measuring this pressure, the sensor provides critical input to the engine control unit (ECU), which adjusts fuel delivery and ignition timing accordingly. This process helps maintain engine efficiency, reduce emissions, and improve drivability. The sensor is designed to meet OEM specifications, ensuring reliable operation and fitment across multiple Audi models including the A4, A5, A6 series, allroad, Q5, and TT Quattro.

Common Applications and Problem Resolution

• Helps resolve rough idling or engine stalling issues
• Addresses poor fuel economy caused by incorrect pressure readings
• Reduces engine hesitation or lack of power during acceleration
• Prevents check engine light triggers related to manifold pressure faults
• Supports emission control compliance by providing accurate sensor data

Installation Notes and Tips

Installation of the Standard Ignition AS439 sensor requires basic mechanical skills and standard automotive tools. Before installation, ensure the engine is cool and disconnect the battery to prevent electrical shorts. Remove the old sensor carefully to avoid damage to the intake manifold or wiring harness. When installing the new sensor, verify the connector is securely attached and free of corrosion. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty Information

Standard Ignition manufactures the AS439 sensor to meet or exceed OEM quality standards. Each unit undergoes rigorous testing to ensure durability and accurate performance. While specific warranty terms may vary, Standard Ignition typically offers a limited warranty covering defects in materials and workmanship. This provides assurance of the sensor’s reliability when installed in compatible Audi models.