Hella 009149121 Mass Air Flow Sensor

Overview of Hella Mass Air Flow Sensor 009149121

The Hella Mass Air Flow Sensor 009149121 is designed for precise air intake measurement in select Mercedes-Benz models. This sensor ensures accurate engine performance by monitoring airflow through the intake pipe, supporting optimal fuel injection and emission control.

• Connector Quantity: 5 for reliable electrical connections
• Mounting Type: Pipe-neck for secure installation
• Suction Pipe Connector Diameter: 84 mm to match specific intake systems
• Compatible with multiple Mercedes-Benz models including C32 AMG, E320, and ML350
• Part Number: 009149121 for exact replacement

Detailed Description of the Hella Mass Air Flow Sensor

This mass air flow sensor from the Hella brand line is engineered to provide accurate measurement of the volume and density of air entering the engine. Featuring a pipe-neck mounting type and a suction pipe connector diameter of 84 mm, it integrates seamlessly with the air intake system of Mercedes-Benz vehicles such as the C240, CLK320, and SLK320. The sensor includes five connectors, ensuring stable and consistent electrical communication with the engine control unit. The Hella product line is known for its focus on emission control components, delivering sensors that meet OEM specifications for durability and performance.

Applications and Common Issues Addressed

• Helps correct inaccurate air-fuel mixture readings
• Resolves engine hesitation or stalling related to airflow sensor faults
• Improves fuel efficiency by providing precise airflow data
• Reduces emission control system errors and check engine light triggers
• Supports smooth acceleration and engine responsiveness

Installation Notes and Tips

• Ensure the suction pipe connector diameter of 84 mm matches the vehicle’s intake pipe
• Verify the five-pin connector aligns properly with the vehicle wiring harness
• Handle the sensor carefully to avoid damage to the sensitive measuring element
• Follow manufacturer torque specifications for pipe-neck mounting to prevent leaks
• Clear any diagnostic trouble codes after installation to reset the engine control unit

Quality Assurance and Warranty Information

The Hella Mass Air Flow Sensor 009149121 is manufactured to meet strict quality standards, ensuring reliable performance in emission control systems. While specific warranty details may vary, Hella products typically come with a limited warranty covering defects in materials and workmanship. This sensor complies with relevant environmental regulations, although it contains substances such as lead (SVHC 7439-92-1) that require proper handling and disposal.