Walker 225-1257 Manifold Absolute Pressure Sensor

Walker 225-1257 MAP Sensor Overview

Walker Products 225-1257 is a manifold absolute pressure sensor for engine management systems that rely on accurate intake manifold pressure readings. It is listed for 2007-2010 Mini Cooper applications and supports proper fuel and ignition control when the original sensor is worn or failing.

• Manifold Absolute Pressure Sensor for engine load and airflow signal input
• Fits 2007-2010 Mini Cooper
• Walker Products part number 225-1257
• Cross-references Bosch 0261230135 and Standard Ignition AS426 for the same application
• Built by Walker Products, a long-standing fuel system and engine sensor manufacturer

Product Line Details

Walker Products supplies engine management components under the Walker Products line, including sensors used in fuel and ignition control systems. The 225-1257 MAP sensor follows that focus by providing a direct replacement option for vehicles that depend on manifold pressure data for drivability and emissions control.

Fitment and Application

Fits 2007-2010 Mini Cooper, N/A. This fitment covers the 2007, 2008, 2009, and 2010 model years for the Mini Cooper platform. If you are searching for a Mini Cooper manifold absolute pressure sensor or Walker 225-1257 replacement, verify the original part number before ordering.

Common Symptoms This Part May Address

• Rough idle or unstable engine speed
• Hard starting or extended crank time
• Check engine light related to manifold pressure or engine load readings
• Reduced throttle response during acceleration
• Incorrect fuel delivery caused by inaccurate MAP sensor input

Installation Notes

Confirm connector style, mounting location, and OE part number before installation. Clear diagnostic trouble codes after replacement and inspect the intake system for vacuum leaks or wiring damage that could affect sensor readings. For Mini Cooper MAP sensor replacement work, follow the vehicle service procedure and verify live data after installation.

Quality Assurance

Walker Products has supplied fuel system and engine sensor components since 1946 and states that its products are manufactured to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified, with engineering and technical support resources behind product application data.