Standard Ignition MAS0158 Mass Air Flow Sensor

Mass Air Flow Sensor for Audi and Volkswagen

Standard Ignition MAS0158 is a complete mass air flow sensor assembly built for direct replacement on select Audi and Volkswagen applications. It uses a bolt-on attachment method, a plastic housing, and a 5-blade terminal layout with one oval female connector for a straightforward OE-style connection.

Compatible With 2001-2005 Audi and Volkswagen fitments, including Audi A6, Audi Allroad Quattro, Audi S4, and Volkswagen Passat. This Standard Ignition MAS0158 mass air flow sensor is designed for vehicles that need accurate incoming air measurement for proper engine management.

Key Features

• Complete assembly with housing included
• Bolt-on attachment method for direct mounting
• Oval female connector with 5 male blade terminals
• Plastic housing construction
• Two-bolt mounting pattern
• OE-style replacement for select Audi A6, Audi Allroad Quattro, Audi S4, and Volkswagen Passat applications

Detailed Description

The Standard Ignition MAS0158 mass air flow sensor measures the air entering the engine so the control system can calculate fuel delivery and airflow-related adjustments. For 2001-2003 Audi Allroad Quattro, 2002-2004 Audi A6, 2002 Audi S4, and 2003-2005 Volkswagen Passat applications, this complete assembly provides the sensor and housing configuration needed for a direct replacement service. The MAS0158 is a practical choice when restoring drivability on vehicles that rely on precise airflow input.

This part cross-references Bosch 0280218100 and Delphi AF10157 for the same application.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation during acceleration
• Reduced fuel economy from incorrect air-fuel calculation
• Check engine light related to mass air flow sensor faults
• Poor throttle response on Audi A6, Audi Allroad Quattro, Audi S4, or Volkswagen Passat models

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. The MAS0158 uses a bolt-on design with one oval female connector and two bolt holes, so matching the existing harness and air intake housing is important for proper fitment. Confirm the vehicle application by year and model before replacing the sensor.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. MAS0158 is built as a complete assembly to support a direct replacement installation on the listed Audi and Volkswagen applications.