The Volvo D13 ECM ECU Part 21042371 P03 is an OEM diesel engine computer module designed for easy installation on the front of a vehicle. This pin terminal type ECU requires programming and has a metal surface finish. Made specifically for Volvo vehicles, this ECM ensures reliable performance with its guaranteed programmable features and 7 terminal quantity. With a vintage part designation of no, this ECM is a reliable choice for those looking to replace their existing engine control unit.