OE Quality
60-Day Returns

Walker 245-1261 Mass Air Flow Sensor
Overview of Walker Mass Air Flow Sensor 245-1261
The Walker Mass Air Flow Sensor 245-1261 is designed specifically for BMW 745i and 745Li models. This sensor plays a critical role in monitoring the amount of air entering the engine, ensuring optimal fuel delivery and engine performance.
- Compatible with BMW 745i and 745Li
- Part number 245-1261 for precise identification
- Includes mounting hardware for straightforward installation
- Features a 5-terminal female connector
- Housing not included
Walker Mass Air Flow Assembly Product Line Details
The Walker Mass Air Flow Assembly product line focuses on providing reliable emission control sensors tailored for specific vehicle applications. This line emphasizes accurate airflow measurement components that meet OEM specifications, supporting efficient engine management systems. The 245-1261 sensor is part of this line, ensuring compatibility and performance for BMW 745i and 745Li models.
Detailed Product Description
This mass air flow sensor from Walker is engineered with a 5-terminal female connector, allowing seamless integration with the vehicle’s wiring harness. While the housing is not included, the sensor comes with mounting hardware to facilitate secure attachment. The sensor’s design supports precise airflow measurement, which is essential for maintaining proper air-fuel ratios and reducing emissions in BMW 745i and 745Li vehicles. Using the correct part number 245-1261 ensures compatibility and reliable operation within the vehicle’s emission control system.
Common Issues Addressed by This Sensor
- Irregular engine idling or stalling
- Reduced fuel efficiency in BMW 745i and 745Li
- Check engine light triggered by airflow sensor faults
- Poor acceleration or hesitation during throttle response
- Increased emissions due to inaccurate air measurement
Installation Notes and Tips
Installation of the Walker 245-1261 sensor requires careful handling of the 5-terminal female connector to avoid damage. Since the housing is not included, ensure the existing housing is in good condition before installation. The included mounting hardware simplifies securing the sensor in place. It is recommended to disconnect the battery before installation and verify all electrical connections are secure to prevent sensor malfunction.
Quality Assurance and Warranty
Walker products are manufactured to meet industry standards for emission control sensors. The 245-1261 mass air flow sensor undergoes quality checks to ensure durability and performance. While specific warranty details are not provided here, Walker typically offers limited warranties on their emission control components. Refer to product documentation or manufacturer resources for exact warranty terms.
| Brand | Walker |
| Part Number | 245-1261 |
| Position | Walker Mass Air Flow Assembly |
| Connector Gender | Female |
| Housing Included | No |
| Mounting Hardware Included | Yes |
| Terminal Quantity | 5 |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2003 | BMW | 745i | 4.4L | V8 | N/A | Fits models up to September 2003.; Walker Mass Air Flow Assembly |
| 2003 | BMW | 745Li | 4.4L | V8 | N/A | Fits models up to September 2003.; Walker Mass Air Flow Assembly |
| 2002 | BMW | 745i | 4.4L | V8 | N/A | Walker Mass Air Flow Assembly |
| 2002 | BMW | 745Li | 4.4L | V8 | N/A | Walker Mass Air Flow Assembly |
* 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.