Walker 225-1338 Manifold Absolute Pressure Sensor

Walker MAP Sensor for Mercedes-Benz

Walker Products Sensor Only MAP Sensor Part Number 225-1338 is an OE replacement manifold absolute pressure sensor for Mercedes-Benz applications. It measures intake manifold pressure and sends that signal to the ECM so fuel delivery and ignition timing can be adjusted for proper engine operation, drivability, and emissions control.

Built with a black plastic body, oval female connector, blade terminals, and a plug-in fitment, this sensor is made to match OE electrical output, pressure range, and connector fit. It is a direct replacement for Mercedes-Benz C300, GLC300, E350, and related models where accurate manifold pressure data is required.

Key Features

• OE replacement manifold absolute pressure sensor
• Black plastic housing with oval connector design
• 1 female connector, 3 male blade terminals
• Plug-in fitting with 1 port
• Engineered for OE electrical output and pressure range
• Built for high-temperature, vibration-prone engine bay conditions
• Walker Products part number 225-1338

Detailed Description

Walker Sensor Only line focuses on replacement sensors that match factory-style fit and signal behavior. This MAP sensor is designed to communicate intake manifold pressure to the ECM so the engine can calculate load and manage fuel injection and ignition timing. That makes it an important component for Mercedes-Benz turbocharged and naturally aspirated engine management systems across gasoline and diesel platforms. This part cross-references Standard Ignition AS647 for the same application.

Compatible With Mercedes-Benz C300, GLC300, E350, GLE350, CLA250, GLA250, and other listed applications, part number 225-1338 is a practical choice when restoring sensor accuracy on vehicles such as the Mercedes-Benz C300 and GLC300. It is also listed for intake manifold or air cleaner housing locations depending on model year and engine configuration.

Common Issues This Sensor May Address

• Check engine light related to MAP sensor performance
• Rough idle or inconsistent throttle response
• Incorrect fuel trim or air-fuel calculation
• Reduced power under load
• Emissions or drivability faults tied to manifold pressure readings

Installation Notes and Tips

Verify the connector shape, terminal count, and mounting location before installation. This sensor uses a plug-in design with a single oval connector, so the harness should seat fully without forcing the terminals. Confirm whether the vehicle calls for an intake manifold or air cleaner housing location, since fitment varies by Mercedes-Benz model and year. Clear diagnostic trouble codes after installation and confirm live data readings during a road test.

Quality Assurance

Walker Products manufactures this MAP sensor to OE specifications for electrical output, pressure range, and connector fit. Each sensor is tested for accuracy, responsiveness, and durability to support reliable engine management performance in Mercedes-Benz applications.