Audi A4 B7 Air Flow Mass Meter Sensor 074906461B

Audi A4 B7 Air Flow Mass Meter Sensor is a component from the Air and fuel intake sensors group, responsible for the precise measurement of the amount of air drawn into the engine. A properly functioning mass air flow sensor allows the engine control unit to dose fuel correctly, which translates into stable engine operation, better throttle response, and reduced excessive fuel consumption.

Specifications and technical data

• SKU: 074906461B
• Mark: Audi
• Condition: Used
• OEM Part Number: 074906461B
• Substitutable numbers: 074906461B, 074 906 461 B, 0281002461, 0 281 002 461
• Category: Air Intake & Fuel Sensors

The role of the mass air flow sensor in the Audi intake system

The mass air flow sensor in the Audi A4 B7 is a sensor mounted in the intake duct that continuously monitors the airflow directed to the cylinders. Based on the signal from the sensor, the engine control unit calculates the fuel dose, corrects the injection timing, and adjusts the operation of other components. A functional component helps to reduce issues such as:

• rough engine idling,
• power loss in the low and mid-RPM range,
• excessive exhaust smoke and increased fuel consumption.

Thanks to accurate air mass measurement, the fuel system operates under stable conditions, and the engine maintains predictable characteristics across the entire RPM range.

Benefits of using an original Audi sensor

The original mass air flow sensor designed for the Audi A4 B7 is engineered for the specific characteristics of this series' power units. This means a matched signal map, appropriate sensitivity, and electrical compatibility with the factory ECU. In practice, this translates into:

• stable engine operating parameters without the need for additional adaptation,
• proper cooperation with the injection system and onboard systems,
• reduced risk of error codes in the control unit memory related to incorrect sensor signals.

Choosing a component from this group instead of a random replacement allows you to maintain the manufacturer's factory specifications regarding air-fuel mixture control.

Used condition – a practical approach to service

The presented mass air flow sensor is a used component, which represents a reasonable compromise between repair costs and maintaining original specifications. A used sensor from dismantling is a solution often chosen for servicing older generations of Audi, where it is crucial to keep the vehicle in good condition while controlling expenses. This type of component allows you to restore the proper operation of the intake system without the need to invest in expensive new parts.

Selection by part numbers and compatibility

When replacing the mass air flow sensor in an Audi A4 B7, it is extremely important to match the part by its OEM number and interchangeable numbers. This allows you to verify electrical and mechanical compatibility with your engine, avoiding installation problems or errors in the control unit's operation. If in doubt, it is worth comparing the markings on the removed component or using a parts catalog based on the VIN.

If you want to better understand how to safely choose used sensors and other engine electronics, the following guide will be helpful: Used automotive electronics – how to consciously choose ECU modules and sensors, which discusses selection by numbers, compatibility issues, and practical installation examples.

Expanding Audi intake system service

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional air flow sensors, intake temperature measurement elements, or components related to fuel dosing, check the available parts in the Audi air and fuel intake sensors category.

Summary

Audi A4 B7 Air Flow Mass Meter Sensor is a functional element of the intake system that has a direct impact on engine refinement, dynamics, and fuel consumption. Choosing an original, used sensor from the appropriate group allows you to restore the correct operating parameters of the power unit while maintaining a reasonable level of service costs. It is a practical solution for users who expect proven compatibility with factory engine management and stable operating conditions for their Audi.