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Walker 245-1261 Mass Air Flow Sensor
| Brand | Walker 245-1261 |
|---|---|
| Connector Gender | Female |
| Housing Included | No |
| Mounting Hardware Included | Yes |
| Terminal Quantity | 5 |
| Product line | Walker Mass Air Flow Assembly |
| Fits | BMW · 4 vehicles |
OE-standard quality. Built to meet or exceed OEM specifications.
Engine sensor expertise. Backed by Walker's long history in fuel system and engine management parts.
5-terminal design. Female connector for a secure electrical connection.
Cross-references Davico Mfg 19720, Standard Ignition MAS0431 and 5S2957 for the same application. See all 8.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker Mass Air Flow Assembly for BMW 745i/745Li
Walker Mass Air Flow Assembly Part Number 245-1261 is a direct-fit engine management sensor for select 2002-2003 BMW 745i and 745Li applications. It is built for vehicles that need accurate incoming air measurement to support proper fuel delivery and drivability.
Key Features
- Mass air flow sensor assembly for emission control and engine management
- Fits 2002 BMW 745i and 745Li
- Fits 2003 BMW 745i and 745Li, up to September 2003
- Female connector with 5 terminals
- Mounting hardware included
- Housing not included
Product Details
Walker’s Mass Air Flow Assembly line focuses on accurate sensor performance for fuel-injected engines. Part Number 245-1261 is engineered to meet or exceed OEM standards and specifications, with manufacturing and engineering support used to maintain application accuracy and part quality. This part cross-references Standard Ignition MAS0431 for the same application.
Compatible With BMW 745i and BMW 745Li models from 2002 and 2003, this mass air flow sensor helps restore correct airflow signal input to the engine control system. It is a practical replacement when the original sensor is no longer reporting airflow data correctly.
Common Issues This Part May Address
- Rough idle caused by inaccurate airflow readings
- Check engine light related to mass air flow sensor faults
- Hesitation or poor throttle response
- Incorrect fuel trim from faulty air measurement
- Reduced drivability on BMW 745i and 745Li models
Installation Notes and Tips
Verify connector style, terminal count, and application before installation. This unit uses a female connector with 5 terminals and includes mounting hardware. Confirm the vehicle is a 2002 BMW 745i or 745Li, or a 2003 BMW 745i or 745Li built up to September 2003. Inspect the intake tract for leaks or contamination before replacing the sensor.
Quality Assurance
Walker Products has supplied fuel system and engine sensor components since 1946 and operates as an ISO 9001/IATF16949 certified manufacturer. The brand’s product development and technical support processes are used to maintain application accuracy and consistent production standards for parts like the Walker Mass Air Flow Assembly 245-1261.
| 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 |
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