Hella 009149531 Mass Air Flow Sensor

Hella Mass Air Flow Sensor for BMW Diesel Applications

The Hella 009149531 mass air flow sensor measures incoming air so the engine control system can calculate fuel delivery accurately. This OE-style replacement is built with a bolted mounting design and a 5-connector electrical interface for direct service on select BMW diesel models.

Compatible with 2014-2018 BMW X5, 2014-2016 BMW 535d, 2014-2016 BMW 535d xDrive, and 2015 BMW 740Ld xDrive, this Hella mass air flow sensor supports precise airflow monitoring in diesel intake systems. Part number 009149531 is also cross-referenced to Delphi AF10504 for the same application.

Key Features

• Mass air flow sensor for emission control and engine management
• Bolted mounting type for secure installation
• 5-connector electrical configuration
• OE-style Hella replacement for select BMW diesel vehicles
• Part number 009149531 for easy identification

Detailed Product Overview

This Hella mass air flow sensor is used to report intake air volume to the engine control module, helping maintain proper air-fuel calculation and emissions system operation. It is specified for BMW X5, BMW 535d, BMW 535d xDrive, and BMW 740Ld xDrive applications listed above, making it a direct-fit service part for vehicles that require a bolted sensor with five connectors. If you are replacing a failing BMW X5 mass air flow sensor or servicing a BMW 535d diesel intake system, Hella 009149531 provides the correct fitment details for those applications.

Common Issues This Part Can Address

• Incorrect airflow readings from a worn or contaminated sensor
• Rough idle caused by inaccurate air measurement
• Reduced throttle response from faulty intake data
• Check engine light related to mass air flow sensor performance
• Fuel trim problems caused by inconsistent air metering

Installation Notes and Tips

Verify the connector count and mounting style before installation. This sensor uses a bolted mounting type and a 5-connector layout, so confirm the original part matches those specifications before replacement. Inspect the intake tract, air filter housing, and wiring connector for contamination or damage before installing the new sensor.

Quality Assurance

Hella is an established OE supplier brand, and this sensor is built to match the listed application requirements for BMW diesel fitment. Part number 009149531 is identified for the vehicles shown above, with additional cross-reference to Delphi AF10504.