Description
Part number 5WS40379A-T identifies this Siemens VDO diesel engine management module, manufactured for original-equipment fitment across a range of Citroën and Peugeot vehicles. Pulled from an operational car and subjected to functional verification before listing, this unit is a cost-effective alternative to a new module for owners of qualifying models.
The Siemens SID (System for Integrated Diesel management) architecture within this ECU controls the full sequence of common-rail injection events — pilot, main, and post-injection — together with turbocharger boost targeting, exhaust gas recirculation valve timing, and diesel particulate filter regeneration strategies where applicable. Processing data from rail pressure, crankshaft position, and air mass sensors, the module maintains combustion efficiency and emissions compliance across all engine operating conditions.
ECU deterioration in Citroën and Peugeot diesel applications typically surfaces as an engine management warning light, power reduction or limp-home activation, rough idle, hard or non-starting, and occasionally unexpected shutdown. Stored fault codes will usually direct attention to the control module once sensor functionality and harness integrity have been systematically verified and found to be sound.
Check that part number 5WS40379A-T matches the reference number printed on your existing ECU label before purchasing. As a VIN- and calibration-coded diesel module, this unit must be reprogrammed or cloned by a qualified specialist before it will function correctly in the receiving vehicle.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
