OE Quality
60-Day Returns

Walker 245-1109 Mass Air Flow Sensor
Overview of Walker Mass Air Flow Sensor 245-1109
The Walker Mass Air Flow Sensor 245-1109 is designed for precise air measurement in Nissan vehicles, including the Frontier, Pickup, and Xterra models. This sensor helps maintain optimal engine performance by accurately monitoring the amount of air entering the engine.
- Compatible with Nissan Frontier, Pickup, and Xterra
- Part number 245-1109 for exact fitment
- Includes mounting hardware for straightforward installation
- Features a 3-terminal female connector
- Housing not included, designed for direct replacement
Walker Mass Air Flow Sensor Product Line Details
The Walker Mass Air Flow Sensor line focuses on emission control sensors that deliver reliable air flow measurement to support engine management systems. The 245-1109 sensor is part of this line, engineered to meet OEM specifications for Nissan vehicles, ensuring compatibility and consistent performance within the emission control system.
Detailed Product Description
This mass air flow sensor features a 3-terminal female connector, which interfaces directly with the vehicle’s wiring harness. The sensor does not include a housing, so it is intended to replace the sensor element itself within the existing assembly. Mounting hardware is included to facilitate secure installation. The sensor’s design supports accurate air flow readings, which are critical for the engine control unit to adjust fuel injection and maintain emission standards.
Common Applications and Issues Addressed
- Helps resolve engine stalling or rough idling caused by inaccurate air flow data
- Addresses poor fuel economy linked to faulty mass air flow sensors
- Corrects check engine light triggers related to air intake measurement errors
- Improves acceleration response by providing precise air flow information
- Supports emission control compliance in Nissan Frontier, Pickup, and Xterra models
Installation Notes and Tips
Installation requires removal of the old sensor from the air intake system. Since the housing is not included, ensure the existing housing is in good condition before installing the new sensor. Use the included mounting hardware to secure the sensor firmly. Verify the 3-terminal female connector matches the vehicle’s wiring harness to avoid connection issues. It is recommended to disconnect the battery before installation to prevent electrical shorts.
Quality Assurance and Warranty
Walker mass air flow sensors are manufactured to meet strict quality standards for emission control components. The 245-1109 part undergoes testing to ensure accurate air flow measurement and durability under normal operating conditions. Warranty coverage details should be confirmed with the product documentation or supplier.
| Brand | Walker |
|---|---|
| Part Number | 245-1109 |
| Position | Walker Mass Air Flow Sensor |
| Connector Gender | Female |
| Housing Included | No |
| Mounting Hardware Included | Yes |
| Terminal Quantity | 3 |
This part fits 14 vehicles. Search below:
| Year | Make | Model | Submodel | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2004 | Nissan | Frontier | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2004 | Nissan | Xterra | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2003 | Nissan | Frontier | Base | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | |
| 2003 | Nissan | Xterra | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2002 | Nissan | Frontier | Base | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | |
| 2002 | Nissan | Xterra | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2001 | Nissan | Frontier | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2001 | Nissan | Xterra | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2000 | Nissan | Frontier | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 2000 | Nissan | Xterra | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 1999 | Nissan | Frontier | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 1998 | Nissan | Frontier | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | ||
| 1997 | Nissan | Pickup | Automatic | 2.4L | L4 | N/A | Walker Mass Air Flow Sensor | |
| 1996 | Nissan | Pickup | Automatic | 2.4L | L4 | N/A | Fits models from January 1996; Walker Mass Air Flow Sensor |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.