Walker 245-1188 Mass Air Flow Sensor

Walker Mass Air Flow Sensor for BMW

The Walker Mass Air Flow Sensor 245-1188 is a direct-fit engine management sensor for select BMW applications. It is built for vehicles that require accurate airflow measurement to support proper fuel delivery, idle quality, and drivability.

Walker Products has supplied fuel system and engine management components since 1946, with manufacturing and engineering processes focused on meeting or exceeding OEM standards. The Walker Mass Air Flow Sensor line is backed by product management, technical support, and ISO 9001/IATF16949-certified quality systems.

Key Features

• Part number: 245-1188
• Mass air flow sensor for emission control and engine management applications
• 5-terminal female connector
• Mounting hardware included
• Housing not included
• OE-style replacement for select BMW 325i, 525i, 530i, Z4, 330i, 330xi, 525xi, 530xi, 323i, 325xi, and 130i applications

Fitment Details

• Fits 2009 BMW 325i, Sensor Only
• Fits 2008-2009 BMW 525i, Sensor Only
• Fits 2006-2009 BMW Z4, Walker Mass Air Flow Sensor
• Fits 2007-2008 BMW 325i, To: 31/08/2008; Sensor Only
• Fits 2008 BMW 530i, Sensor Only
• Fits 2006-2007 BMW 130i, N52 Engine; Sensor Only
• Fits 2007 BMW 330i, w/ OEM # 13627520519; Sensor Only
• Fits 2004-2007 BMW 525i, Walker Mass Air Flow Sensor
• Fits 2006-2007 BMW 525xi, Walker Mass Air Flow Sensor
• Fits 2006-2007 BMW 530i, Walker Mass Air Flow Sensor
• Fits 2006-2007 BMW 530xi, Walker Mass Air Flow Sensor
• Fits 2006 BMW 323i, Sensor Only
• Fits 2006 BMW 325i, Walker Mass Air Flow Sensor
• Fits 2006 BMW 325xi, Walker Mass Air Flow Sensor
• Fits 2006 BMW 330i, Walker Mass Air Flow Sensor
• Fits 2006 BMW 330xi, Walker Mass Air Flow Sensor
• Fits 2004-2005 BMW 530i, Engine Management Mass Air Flow Sensor - Fits various makes and models; Walker Mass Air Flow Sensor

What This Sensor Helps Address

• Rough or unstable idle caused by inaccurate airflow readings
• Hesitation or poor throttle response during acceleration
• Check engine light concerns related to airflow measurement
• Fuel trim issues from incorrect air-to-fuel calculations
• Reduced drivability in BMW 325i, 525i, 530i, and Z4 applications

Installation Notes

Verify connector style, terminal count, and vehicle application before installation. This part uses a female connector with 5 terminals and does not include the housing. On listed BMW applications, confirm whether your vehicle requires the sensor only version or the specific OEM reference noted in the fitment data. This part cross-references Standard Ignition MAS0286 for the same application.

Quality Assurance

Walker Products manufactures engine sensors and fuel system components to meet or exceed OEM standards and specifications. The company supports production with in-house engineering, product management, and technical documentation, and operates under ISO 9001/IATF16949-certified quality systems.