Description
Part number 03L907309 is a genuine used, tested Engine ECU Control Module for the Volkswagen Passat B6 (2005–2010), fitted to models equipped with the 2.0 TDI common rail diesel engine. The 03L prefix identifies this as a later-generation TDI management ECU within the VAG Group diesel range, offering enhanced injection control and improved emissions management over earlier 03G units.
The 03L ECU delivers precise common rail injection control, managing pilot injection events, main injection timing, post-injection for DPF regeneration, and EGR modulation to meet Euro 4 and Euro 5 emissions standards fitted to late B6 production. It also supervises the diesel particulate filter regeneration cycle and co-ordinates with the SCR system where applicable.
Passat B6 owners with a failing 03L ECU may encounter limp mode activation, DPF warning lights that cannot be cleared even after forced regeneration, excessive black smoke under acceleration, hard cold-start behaviour particularly in winter, or erratic behaviour of the cruise control and economy mode functions due to disrupted CAN bus communication from the ECU.
This ECU was sourced from a written-off Passat B6 and tested to verify compliance with the 03L907309 OEM specification. Coding using VCDS or an equivalent VAG-compatible tool is mandatory following installation. Professional fitting by a VW diesel specialist is advised. Returns are accepted within 14 days of delivery.
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/
