Denso 198-0004 Manifold Absolute Pressure Sensor

Denso MAP Sensor for Subaru Applications

The Denso 198-0004 manifold absolute pressure sensor is built for precise intake manifold pressure measurement, helping the engine control module manage fuel injection with greater accuracy. It is a compact, lightweight sensor with a simplified connection design for dependable operation in Subaru Legacy, Outback, Impreza, and Forester applications.

• Manifold Absolute Pressure Sensor for emission control and engine management
• 3-terminal design with a single female oval connector
• Pin-style terminals with male terminal gender
• Compact sensor housing for clean OE-style fitment
• High detection accuracy to support lower emissions output
• Direct replacement part number: 198-0004

How This Sensor Works

This MAP sensor measures manifold pressure so the engine computer can adjust air-fuel delivery based on load and operating conditions. On Subaru Legacy, Outback, Impreza, and Forester models, accurate pressure feedback helps maintain stable drivability, consistent throttle response, and proper emission control performance. The Denso 198-0004 is engineered with fewer connections to improve reliability while maintaining precise sensing.

This part cross-references Standard Ignition AS456 and Subaru 22627 AA470 for the same application.

Common Issues It Can Help Address

• Rough idle caused by inaccurate manifold pressure readings
• Hesitation or poor throttle response during acceleration
• Check engine light related to MAP sensor performance
• Incorrect fuel delivery from faulty pressure input
• Elevated emissions from improper engine load calculation

Installation Notes and Tips

Verify the connector shape, terminal count, and terminal gender before installation. This sensor uses one oval female connector with three male terminals, so matching the electrical interface is important for proper fitment. Confirm the vehicle application by year and model before replacing the original sensor, especially on 2010-2012 Subaru Legacy and Outback, 2010-2011 Subaru Impreza, and 2010 Subaru Forester.

• Fits 2010-2012 Subaru Legacy
• Fits 2010-2012 Subaru Outback
• Fits 2010-2011 Subaru Impreza
• Fits 2010 Subaru Forester

Quality Assurance

Denso manufactures this MAP sensor with sensing technology focused on accurate pressure detection and dependable signal output. The design supports precise fuel injection control and emission management in OE-style Subaru applications.