Standard Ignition MAS0203 Mass Air Flow Sensor

Mass Air Flow Sensor for GM V8 Applications

Standard Ignition MAS0203 is a complete mass air flow sensor assembly built for accurate airflow measurement and stable engine management. It is a direct-fit emission control sensor for a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Saab, Hummer, and Isuzu applications, including Silverado 1500, Sierra 1500, Tahoe, Yukon, and Corvette models.

Key Features

• 100% new construction, never remanufactured
• Computer-tested for accurate airflow readings under demanding engine conditions
• Upgraded circuit components for improved reliability and ESD protection
• Operates across extreme temperatures from -40°F to 257°F
• Dual-heated sensing elements for consistent performance across air/fuel systems
• Complete assembly with housing included
• Bolt-on attachment with 3 bolt holes
• Oval connector, female connector gender, 1 connector, 5 blade terminals
• Metal and plastic construction with a thicker wall for added durability

Detailed Description

This Standard Ignition MAS0203 mass air flow sensor is engineered to send precise airflow data to the ECU so the engine can maintain the correct air/fuel ratio. Accurate MAF sensor output is critical for clean combustion, smooth drivability, and proper fuel control on vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade. The sensor uses dual-heated sensing elements and upgraded internal components to improve circuit reliability, resist electrostatic discharge, and maintain performance in harsh operating conditions. This part cross-references Delphi AF10043 and Beck/Arnley 158-1465 for the same application.

What It Helps Fix

• Check engine light related to mass air flow sensor performance
• Rough idle or unstable engine speed
• Hesitation, stumble, or poor throttle response
• Incorrect fuel trim caused by inaccurate airflow readings
• Reduced fuel economy from improper air/fuel mixture control

Installation Notes and Tips

Fits 1999-2007 Chevrolet Silverado 1500, 1999-2006 Chevrolet Silverado 2500, 2001-2006 Chevrolet Silverado 2500 HD, 2000-2006 Chevrolet Tahoe, 2000-2006 GMC Yukon, and other listed GM applications. Fits 2001-2007 Chevrolet Corvette, 2004-2006 Cadillac Escalade, and 2005-2009 GMC Envoy, N/A. Verify connector shape, terminal count, and housing style against the original sensor before installation. Clean the intake tract and inspect for air leaks, damaged wiring, or contamination that could affect sensor readings after replacement.

Quality Assurance

Standard Ignition manufactures this MAS0203 sensor to strict quality standards and computer-tests each unit to confirm accurate airflow signal output. The new, non-remanufactured design helps reduce the risk of leftover debris affecting sensor operation, while the upgraded components are built for durability and stable performance in demanding engine environments.