Audi S4 B7 4.2 V8 Air Intake Mass Flow Meter Sensor Intake Unit 0280218067

Audi S4 B7 4.2 V8 Air Intake Mass Flow Meter Sensor Intake Unit is a component from the Air and fuel intake sensors group, designed for precise control of the air intake volume in the 4.2 V8 engine. A properly selected intake unit supports stable engine operation, correct throttle response, and predictable fuel consumption. This is a solution for users who expect consistent engine performance parameters and want to maintain a configuration in line with the manufacturer's specifications.

Specifications and technical data

• SKU: 077133471KX
• Mark: Audi
• Condition: Used
• OEM Part Number: 077133471KX
• Substitutable numbers: 077133471KX, 077 133 471 KX, 0280218067
• Rim width: 6
• Category: Air Intake & Fuel Sensors

Purpose and function in the intake system

The presented air intake mass flow sensor is designed to work with the naturally aspirated V8 engine in the Audi S4 B7 generation. Its task is to measure the amount of air drawn through the intake system and transmit this data to the engine control unit. Based on this, the ECU selects the fuel dose, corrects the ignition timing, and stabilizes the idle speed.

A functional sensor integrated with the intake unit helps to reduce phenomena such as rough cold idling, power drops at higher RPMs, or increased fuel consumption. For high-power engines like the 4.2 V8, accurate airflow measurement is of particular importance for maintaining repeatable performance.

Technical characteristics and system integration

The intake unit with the mass flow sensor is a component mounted in the intake path, between the air filter and the intake manifold. The design intended for Audi enables proper airflow guidance through the measuring section, which translates into a stable signal for the controller.

The element belongs to the Air and fuel intake sensors group, which means it works with other components responsible for mixture preparation, such as the throttle or the fuel injection system. Proper integration of these components influences engine refinement, load response, and behavior during dynamic throttle changes.

Condition, service application, and mounting aspects

The product is offered as a used part, which allows for an economical replacement of the component in case of damage to the existing sensor or intake unit. This type of component is often chosen for typical operational symptoms, such as mixture-related errors, loss of flexibility, or problems with starting on a warm engine.

In workshop practice, replacing the air intake mass flow sensor in an Audi S4 B7 4.2 V8 is a standard service procedure, performed after prior computer diagnostics and analysis of current parameters. Using an intake unit consistent with factory specifications facilitates installation and limits the need for additional modifications.

Benefits of a properly selected mass flow sensor

Choosing the right intake unit with a mass flow sensor for the Audi S4 B7 4.2 V8 brings a number of practical benefits:

• maintaining stable engine operating parameters across the full RPM range,
• more predictable fuel consumption with different driving styles,
• reducing the risk of errors related to the mixture and airflow,
• maintaining the V8 engine's operating characteristics in accordance with the manufacturer's specifications.

For users who treat their car as a daily means of transport, as well as for those who use the engine's potential in a more dynamic way, a functional mass flow sensor is an essential element of the entire system.

Expanding knowledge and selecting elements from the same group

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 air temperature sensors, mass airflow measurement elements, or components working with the fuel system, check the available parts in the Audi Air and fuel intake sensors category.

To better understand the dependencies between the operation of the intake system and fuel supply, it is worth familiarizing yourself with practical tips regarding diagnostics and operation, described in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. This allows you to look at the mass flow sensor in the broader context of the entire fuel system.