Walker 225-1271 Manifold Absolute Pressure Sensor

Walker MAP Sensor for VW and Audi

Walker Products Part Number 225-1271 is an OE replacement manifold absolute pressure sensor for select Volkswagen and Audi applications. It measures intake manifold pressure and sends that signal to the ECM so the engine can calculate load, fuel delivery, and ignition timing with the correct response.

Walker Sensor Only products are built for direct sensor replacement, with OE-style electrical output, pressure range, and connector fit for clean integration on vehicles such as the Volkswagen GTI, Jetta, and Passat, plus Audi Q3, Q5, and A3 platforms.

Key Features

• Manifold Absolute Pressure Sensor for engine management systems
• OE replacement design for accurate pressure signal output
• Black plastic body with oblong female connector
• 3-pin terminal layout with pin terminals
• Built for high-temperature engine bay conditions and vibration resistance
• Walker Part Number 225-1271 for select Volkswagen and Audi fitments

Product Details

This Walker MAP sensor is engineered to match OE specifications so the ECM receives the pressure data needed for stable drivability, fuel control, and emissions performance. It is used across gasoline and diesel engine management systems and is listed for a wide range of Volkswagen and Audi models, including 2015-2026 Volkswagen GTI, 2014-2026 Volkswagen Jetta, 2019-2025 Audi Q3, and 2015-2020 Audi A3. The Sensor Only line focuses on direct sensor replacement where the original connector style and signal requirements must remain consistent. This part cross-references Standard Ignition AS447 for the same application.

Common Issues This Part Can Address

• Check engine light related to manifold pressure signal faults
• Rough idle or inconsistent throttle response
• Incorrect fuel trim or load calculation
• Loss of power under acceleration
• Emissions or drivability concerns tied to MAP sensor output

Installation Notes and Tips

Verify connector shape, terminal count, and sensor location before installation. This unit uses one black female connector with an oblong shape, 3 terminals, and a plastic body. Confirm the vehicle’s application notes, since some listings specify secondary air injection pipe location while others list manifold absolute pressure sensor or air pump system use. For best results, inspect the intake tract and related wiring for contamination, damage, or corrosion before replacing the sensor.

Quality Assurance

Walker Products designs this MAP sensor to meet OE-level electrical and fitment requirements and tests it for accuracy, responsiveness, and long-term reliability. It is built to withstand engine bay heat, vibration, and intake air contaminants while maintaining consistent signal performance.