Audi A4 B9 Air Flow Mass Meter MAF Sensor 2.0 TDI DTNA 04E906461A

The Audi A4 B9 Air Flow Meter MAF Sensor 2.0 TDI DTNA is a component from the Air and Fuel Intake Sensors category, designed for precise measurement of the mass of air drawn into a diesel engine. A used MAF sensor allows for an economical yet technically correct repair of the intake system, maintaining the original performance characteristics of the engine. This is a solution for users who expect stable diesel engine operation and correct fuel delivery.

Specifications and technical data

• SKU: 04E906461A
• Mark: Audi
• Condition: Used
• OEM Part Number: 04E906461A
• Substitutable numbers: 04E906461A, 04E 906 461 A, 0280218486, 0 280 218 486
• Fuel type: Diesel
• Category: Air Intake & Fuel Sensors

Function and Role of the MAF Sensor in Audi A4 B9 2.0 TDI

The MAF air flow meter in the Audi A4 B9 2.0 TDI DTNA is responsible for the accurate measurement of the amount of air drawn in by the engine. Based on this data, the engine control unit determines the fuel dose, injection timing, and auxiliary system operating strategy, which translates to:

• stable idle speed and smooth acceleration,
• correct operation of the injection system in Diesel engines,
• reduced exhaust smoke under load,
• maintenance of factory fuel consumption parameters.

For diesel engines, the repeatability of air flow readings is particularly important, as any measurement error affects the smoothness of operation and exhaust emissions. A functional MAF sensor is therefore a key component of the entire intake system.

Benefits of Using an Original Sensor in the Air and Fuel Intake Sensors Category

Components from the Air and Fuel Intake Sensors category in Audi vehicles are designed to work with specific engine control unit maps. Using the correct air flow meter in the Audi A4 B9 2.0 TDI DTNA ensures:

• maintenance of the original torque characteristics across the entire RPM range,
• correct interaction with the exhaust gas recirculation system and turbocharger,
• reduced risk of control unit errors related to the air-fuel mixture,
• better throttle response under typical driving conditions.

Consequently, replacing a faulty air flow meter with the appropriate MAF sensor allows for the restoration of predictable vehicle behavior without the need for ECU software modifications.

Why Choose a Used Audi MAF Sensor

When it comes to engine electronics, such as air flow meters, used OEM components often prove to be a sensible alternative to aftermarket parts of unknown origin. By choosing a used MAF sensor for the Audi A4 B9 2.0 TDI DTNA, you gain:

• a component from the original Audi production line,
• compliance with the engine control unit's factory parameters,
• the possibility of an economical intake system repair without compromising quality,
• reduced risk of adaptation and compatibility issues.

If you want to better understand how to safely select and install used electronic components in your car, it's worth consulting the Global Parts guide – it thoroughly discusses selection by VIN and OEM numbers, hardware and software compatibility issues, and practical installation examples; you can find it in the article Used Car Electronics On Board – Why Choose Second-Hand ECU Modules and Sensors?.

Intended Use and Compatibility with Diesel Fuel Systems

The presented air flow meter is designed to work with Diesel fuel engines, which is significant for its measurement characteristics and resistance to operating conditions in the intake system. Proper matching of the MAF sensor to the specific engine unit allows for:

• maintaining the correct air-to-fuel ratio across the entire load range,
• minimizing the risk of the engine entering limp mode due to incorrect readings,
• ensuring correct interaction with other sensors in the fuel system.

When selecting a component, it is important to pay attention to compatibility with the engine designation and fuel injection system parameters to avoid post-installation adaptation issues.

Support with Selection and Additional Information

If you are planning comprehensive maintenance of your Audi's intake system and also need other measurement components related to engine fueling, such as additional flow or pressure sensors, check the available parts in the Audi Air and Fuel Intake Sensors category.

If you are looking to optimize service costs while maintaining an appropriate level of quality, a practical guide on saving on repairs using second-hand parts may also be helpful – you can find it in the article Rising Repair Costs vs. The Boom in Used Parts – How to Save on Car Service?.