VW Tiguan 2.0TDIThe make, model, and engine type of the vehicle.This is a diesel engine. Search results confirm this part is for the VW Tiguan 2.0L TDI (Turbo Diesel Injection).04L907309PThe Original Equipment (OE) Volkswagen Group (VAG) part number for the ECU.This is the official VW part number.0281031483The Bosch part number for the ECU hardware.Bosch is the manufacturer of the control unit.EDC17C74The ECU software/system type.This is a highly modern Bosch engine control system, specifically designed for diesel engines (EDC = Electronic Diesel Control). This system is known for its advanced immobilizer/security features (WFS6 CAN).