21QB3249P76
Engine Control Module (ECM)
Mack

The engine control module is the central electronic unit responsible for managing engine performance, fuel efficiency, and emissions. It monitors various sensors and adjusts parameters in real-time to optimize operation. This critical component ensures smooth engine response, reliable starting, and compliance with environmental standards. Its advanced diagnostics capabilities facilitate troubleshooting and maintenance, reducing downtime. Proper functioning of the ECM is vital for maintaining engine longevity and performance under demanding conditions. This module is designed for compatibility and durability, supporting the complex electronic systems of heavy-duty trucks. Source One Parts Center provides this essential component to keep your engine running efficiently.