Walker 245-1109 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-1109

Walker Mass Air Flow Sensor 245-1109 is a direct-fit engine management component for select Nissan applications. It is built with a 3-terminal female connector and includes mounting hardware, making it a practical replacement for restoring accurate airflow signal input to the engine control system.

Compatible With 1996-2004 Nissan Pickup, 1998-2004 Nissan Frontier, and 2000-2004 Nissan Xterra, this Walker MAF sensor supports precise air measurement for vehicles that rely on stable sensor feedback for drivability and fuel control. The Walker Mass Air Flow Sensor line is backed by Walker Products’ long history in fuel system and engine sensor manufacturing, with production aligned to OEM-level specifications.

Key Features

• Part number: 245-1109
• Mass Air Flow Sensor for emission control and engine management applications
• 3-terminal female connector
• Mounting hardware included
• Housing not included
• Walker Mass Air Flow Sensor product line
• Fits select Nissan Frontier, Xterra, and Pickup applications

Detailed Description

Walker Products has supplied fuel system and engine sensor components since 1946 and manufactures this sensor to meet or exceed OEM standards and specifications. The 245-1109 is intended for vehicles that require a replacement MAF sensor with the correct connector style and mounting provisions. This part cross-references Delphi AF10201 and Standard Ignition MAS0397 for the same application.

What It Helps Fix

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Hard starting related to incorrect air metering input
• Reduced fuel economy from faulty sensor data
• Check engine light conditions tied to MAF sensor performance

Installation Notes

Verify connector style, terminal count, and vehicle application before installation. Clean the intake tract and inspect the air filter housing, wiring connector, and related intake components before replacing the sensor. Use the included mounting hardware and confirm the sensor is seated correctly to avoid air leaks or signal issues.

Quality Assurance

Walker Products is an ISO 9001/IATF16949 certified manufacturer with in-house engineering, product management, and technical support resources. The brand’s engine sensor and fuel system components are produced with attention to application accuracy and OEM-style specifications.