51258337827 Engine Control Unit D2066LUH32

Genuine MAN Engine Control Unit (ECU) for the D2066LUH32 engine variant — a 10.5-litre six-cylinder inline common rail diesel producing up to 400 hp, used in MAN TGA, TGX, and TGS heavy trucks. This Bosch EDC17-based unit manages fuel injection timing and quantity, rail pressure regulation, EGR valve control, exhaust brake coordination, and the entire exhaust aftertreatment strategy including SCR dosing, to meet Euro 5 emission limits. The D2066LUH32 designation encodes the specific engine family, power variant, and emissions calibration — the ECU is factory-matched to this combination and will not operate correctly if fitted to a different engine variant without reflashing. A new ECU must be programmed to the vehicle using MAN-CATS diagnostic software: the workshop requires the vehicle VIN, current mileage, and the outgoing ECU part number to configure the replacement correctly. Fault symptoms from a failing ECU include unpredictable power loss, emission-related fault codes, hard starting, and SCR system deactivation.