Bosch MD1CS003 Engine Control Unit (ECU) for PSA 1.5 BlueHDi (DV5) – 0281037198, 9841351080

Looking for a replacement for a faulty Citroën/Peugeot engine control unit? This genuine used Bosch MD1CS003 part comes from a Peugeot 308 T9 (2021) with a 1.5 BlueHDi engine. This is an ECU for modern PSA diesels with injection control, turbocharger, EGR, DPF and SCR (AdBlue).

Main part numbers (for search and match verification)
– Bosch: 0281037198 (0281 037 198), type MD1CS003
– PSA/OEM: 9841351080, 9826975080, 1679599580, 1679599780
– Engine designation: 1.5 BlueHDi (DV5)
Tip: Always compare all numbers on the nameplate of your original unit with the above, incl. type MD1CS003.

Technical information
– Manufacturer / type: Bosch MD1CS003 (diesel ECU for common-rail)
– Power supply / communication: 12 V, CAN (UDS diagnostics)
– Functions: injection control, glow plug, turbocharger, EGR, DPF regeneration, SCR/AdBlue, fuel pump, etc.
– Emission standard: Euro 6.2 / 6.d-temp (indicative – varies according to SW calibration)
– Connectors: 2 PSA multi-pin connectors (see photo)
– Location in the car: engine compartment (for PSA, usually near the battery/box)

Compatibility
– Designed for Citroën/Peugeot cars with 1.5 BlueHDi (DV5) engine from approximately 2018+.
– Often found in models: Peugeot 208 II, 2008 II, 308 T9 (facelift), 3008 II, 5008 II, Rifter, Partner (K9), Expert, Traveller; Citroën C3 III, C3 Aircross, C4 (Cactus FL/SpaceTourer), Berlingo (K9), Jumpy, SpaceTourer.
Important: Software calibrations vary by model, year, transmission and emission level. The decisive factor is the matching of the unit number and connectors, ideally also the SW/HW index.

Mounting and pairing (immobilizer)
– The unit is factory-paired with the vehicle’s BSI/IMMO. For proper function, it is necessary:
– cloning the contents of the original ECU (transferring data/EEPROM/Flash to this unit), or
– virginization and subsequent adaptation (learning) by PSA diagnostics (DiagBox).
– Recommendation: entrust the installation to an auto electrician with experience with the MD1CS003. Before installation, check the power supply, grounds and wiring to prevent damage to the new unit.

Typical symptoms of a defect in the original ECU (when this part will help)
– Engine not starting, ECU communication loss after CAN
– Emergency mode, injector/pump control errors, glow, SCR/AdBlue
– Repetitive errors that return even after repairing peripherals and cabling

Condition and what’s included
– Used original Bosch part from Peugeot 308 T9 (2021) 1.5 BlueHDi.
– The engine control unit itself is supplied (no keys/BSI).
– Condition see photos. Please verify the part number and connectors match your car before purchasing.

Search keywords
engine control unit, ECU, PCM, injection unit, Bosch MD1CS003, 0281037198, 9841351080, 9826975080, 1679599580, 1679599780, PSA, Citroën, Peugeot, 1.5 BlueHDi, DV5, engine type, control unit Peugeot 308 T9

This description is aimed at exact tracing by OEM numbers as well as practical assembly information to make the replacement as quick and hassle-free as possible. If you are unsure about compatibility, compare the labels of both units and consult with your diagnostician.