Denso 198-0003 Manifold Absolute Pressure Sensor

Denso MAP Sensor for Subaru Applications

The Denso 198-0003 manifold absolute pressure sensor is built for precise intake manifold pressure monitoring in select Subaru vehicles. It supports accurate fuel injection control and stable engine management for 2004-2005 Subaru Legacy and Outback, plus 2005 Subaru Forester and Impreza applications.

Key Features

• Manifold Absolute Pressure Sensor for emission control and engine management systems
• Compact, lightweight design with fewer electrical connections
• 3-pin terminal layout with a single female oval connector
• High detection accuracy to support precise fuel delivery and lower emissions
• Direct-fit style for select Subaru Legacy, Outback, Forester, and Impreza models

Detailed Description

Denso part number 198-0003 is a MAP sensor engineered to measure manifold pressure so the engine control system can adjust fuel injection with greater precision. The sensor uses a 3-terminal pin design with one oval female connector, helping maintain a clean, reliable connection in the vehicle’s emission control circuit. This part cross-references Standard Ignition AS327 and Subaru 22627 AA330 for the same application.

Compatible With 2005 Subaru Forester, N/A; 2005 Subaru Impreza, N/A; 2005 Subaru Legacy, N/A; 2005 Subaru Outback, N/A; 2004 Subaru Legacy, N/A, Calif; and 2004 Subaru Outback, N/A, Calif. The Denso 198-0003 is a practical replacement choice when the original MAP sensor is no longer reading manifold pressure accurately on Subaru Legacy and Outback models or on 2005 Forester and Impreza vehicles.

Common Issues This Part May Address

• Rough idle caused by incorrect manifold pressure readings
• Hesitation or poor throttle response during acceleration
• Check engine light related to MAP sensor performance
• Incorrect fuel mixture from inaccurate intake pressure data
• Elevated emissions from improper fuel injection control

Installation Notes and Tips

Verify the connector shape, terminal count, and vehicle application before installation. Inspect the intake plumbing and electrical connector for damage or contamination, and clear diagnostic trouble codes after the repair if required by the vehicle’s service procedure. Confirm California-specific fitment for 2004 Subaru Legacy and Outback models.

Quality Assurance

Denso manufactures this MAP sensor with sensing technology focused on accurate pressure detection and reliable operation in emission control systems. Its compact construction and reduced connection complexity support consistent performance in the intended Subaru applications.