Delphi AF10491 Mass Air Flow Sensor

Delphi AF10491 Mass Air Flow Sensor

The Delphi AF10491 is a premium mass air flow sensor probe for probe-only applications. Built from Delphi’s OE-focused engineering background, it is made for accurate airflow measurement in select Audi and Volkswagen vehicles with a 3-terminal, blade-style electrical connection.

Key Features

• Mass air flow sensor, probe only
• Black and silver finish
• Female connector with 1 rectangle connector and 3 male blade terminals
• Bolt-on mounting type
• Housing not included
• Wiring harness not included
• Premium item grade
• Package includes the sensor probe and instruction sheet

Fitment Details

• Fits 1998-2000 Audi A6 Quattro, N/A. Compatible with vehicles with probe-only Mass Air Flow Sensors.
• Fits 1998-1999 Audi A4, N/A. Compatible with vehicles with probe-only Mass Air Flow Sensors.
• Fits 1998-1999 Audi A4 Quattro, N/A. Compatible with vehicles with probe-only Mass Air Flow Sensors.
• Fits 1998-1999 Audi A6, N/A. Compatible with vehicles with probe-only Mass Air Flow Sensors.
• Fits 1998-2000 Volkswagen Passat, N/A. Compatible with vehicles with probe-only Mass Air Flow Sensors.

Detailed Description

Delphi AF10491 is a direct-fit style mass air flow sensor probe for select Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, and Volkswagen Passat models that use a probe-only MAF design. Delphi draws on more than a century of OE experience and supplier knowledge to build aftermarket parts with the fit and function expected in emission control sensor applications. This part cross-references Hitachi Automotive MAF0021 and Standard Ignition MAS0239 for the same application.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Lean or rich fuel trim concerns related to airflow measurement
• Check engine light conditions tied to MAF sensor performance
• Reduced drivability from a failing probe-only sensor

Installation Notes and Tips

Verify the vehicle uses a probe-only mass air flow sensor before ordering. Confirm the connector style, terminal count, and bolt-on mounting points match the original unit on the vehicle. Because the housing and wiring harness are not included, reuse the existing components where applicable and follow the instruction sheet during installation.

Quality Assurance

Delphi builds this sensor using OE heritage and application knowledge developed through long-term supplier experience with major automakers. The AF10491 is a premium-grade replacement part for emission control sensor service.