Mass Airflow Sensor (MAF) - 2002 Corvette C5 LS1

The 2002 Chevrolet Corvette C5 relies on the AC Delco 25168491 (superseding 15904068) mass airflow sensor to precisely meter intake air for the 5.7L LS1 powertrain control module. This three-wire Delphi unit is dimensionally identical across all 1997-2004 Corvettes, including the high-output LS6 Z06 variants, making junkyard sourcing straightforward from any C5 donor regardless of model year. When inspecting used components, verify the integrity of the integral laminar flow screen—its removal by previous owners causes erratic idle and part-throttle hesitation. Check the connector pins for green oxidation common in humid climates and ensure the mounting tabs aren't cracked. During installation, lightly lubricate the O-ring with dielectric grease and torque the retaining screws to 18 in-lbs to prevent vacuum leaks. Avoid touching the platinum hot wire element; contamination from finger oils or over-oiled aftermarket filters destroys calibration. While 1998-2002 Chevrolet Camaro LS1 applications use electrically identical sensors, the plastic housings differ, requiring sensor transfer to the Corvette-specific intake tract housing for proper mounting.