Mitsubishi Lancer Idle Air Control Valve IAC (MD619857)

Full Product Name: Idle Air Control Valve (IAC / IACV)
OEM Part No.: MD619857; Compatible Part Numbers: 1450A116, MD628174 etc.
Fitment: Mitsubishi Lancer, Space Star, Carisma and selected Chrysler models, for 4G18/4G93/4G94 series engines
Structure & Specs: Stepper motor structure, 6-pin dedicated waterproof connector, with O-ring seal, OEM mounting hole spacing, aftermarket direct-fit version with matching electrical parameters and travel range
Core Function: ECU-controlled stepper motor to regulate bypass air volume, stabilize idle speed and control fast cold idle, preventing rough idle, stalling and abnormal high/low idle speed
Common Faults: Carbon buildup jamming, motor aging → erratic idle speed, stalling, DTC P0505, hard cold start
Replacement Tips: Clean throttle body, install new O-ring, complete idle speed adaptation and clear fault codes after installation