Standard Ignition MAS0531 Mass Air Flow Sensor

Mass Air Flow Sensor for Toyota and Lexus

Standard Ignition MAS0531 is a new mass air flow sensor built for direct plug-in replacement on select Toyota and Lexus applications. It is designed with a rectangular female connector and 5 male blade terminals for a straightforward electrical connection.

Key Features

• Part number: MAS0531
• Brand: Standard Ignition
• New mass air flow sensor
• Plug-in attachment method
• 1 rectangular female connector
• 5 male blade terminals
• Direct-fit style for select Toyota and Lexus vehicles

Detailed Description

The Standard Ignition MAS0531 mass air flow sensor is an emission control sensor used to measure incoming air volume for engine management systems. Accurate airflow input helps the engine control module maintain proper fuel delivery and drivability on applications such as the Toyota 4Runner, Tacoma, T100, Previa, Avalon, Camry, and Lexus ES300. This part cross-references Delphi AF10603 for the same application.

Compatible With 1996-1998 Toyota 4Runner, N/A; 1995-1998 Toyota T100, N/A; 1995-1998 Toyota Tacoma, N/A; 1996-1997 Toyota Previa, N/A; 1995-1996 Lexus ES300, N/A; 1995-1996 Toyota Avalon, N/A; and 1995-1996 Toyota Camry, N/A. The MAS0531 part number is also a useful reference when verifying the correct sensor against existing OE or aftermarket listings.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Lean or rich fuel trim concerns
• Check engine light related to airflow sensor performance
• Poor throttle response on affected Toyota and Lexus models

Installation Notes and Tips

Confirm connector shape, terminal count, and vehicle application before installation. This sensor uses a plug-in attachment method with a single rectangular female connector, so the harness connection should match the original layout. Verify fitment by year, make, and model for Toyota 4Runner, Tacoma, T100, Previa, Avalon, Camry, or Lexus ES300 before replacing the existing unit.

Quality Assurance

Standard Ignition supplies this MAS0531 sensor as a new replacement part for emission control service. Its OE-style connector design and application-specific fitment support accurate replacement on the listed vehicles.