The Volvo D12 Engine Control Module ECM 3964402 is a crucial component for controlling the engine of a Volvo vehicle. This ECM requires programming and has a maximum amperage of 12A, making it essential for proper functionality. With a bolt-on mounting style and pin terminal type, this easy-to-install module connects with a supply voltage and ground. The ECM features EEPROM memory and a male connector type, making it a reliable choice for Volvo engine control.