51805375 MJD 6F3.Y1 – 1.3 Multijet engine ECU
Part number 51805375 identifies a Magneti Marelli MJD 6F3.Y1 ECU for the Lancia Ypsilon 1.3 Multijet. Before shipping, we check it on the bench and in our test car.
Typical symptoms of a faulty MJD 6F3.Y1 ECU
A damaged ECU can stop the engine from starting because the injectors receive no signal. The tester then cannot connect to the unit, and a measurement may show no power at the ECU despite good fuses. The failure can follow water ingress or a short circuit in the wiring.
The same symptoms can, however, come from a fault in the harness, power supply or sensors, so run a diagnosis before buying.
Numbers on the label
- Part number: 51805375
- ECU type: Magneti Marelli MJD 6F3.Y1 / MJD6F3.Y1
Tests, options and warranty
- Every ECU is tested on the bench and fitted to our test car before dispatch.
- Paid extra options: EGR OFF and DPF OFF.
- Warranty: 6 months.
Vehicle compatibility
This ECU was removed from a Lancia Ypsilon 1.3 Multijet. Compatibility is decided by the part number on the label, not just by the model and year – compare number 51805375 and marking MJD 6F3.Y1 with your ECU. A different part number means a different ECU version.
Coding to the immobiliser
- Virgin: the ECU codes itself after fitting – no programming, with a matching part number and a working immobiliser.
- IMMO OFF (on request): the car drives, but a red immobiliser warning is shown on the dashboard and a fault stays in diagnostics that cannot be cleared without pairing with the immobiliser.
- We recommend Virgin, as it leaves no fault.
Useful links
Questions and answers – ECU 51805375
Does ECU 51805375 fit my car?
Check the label of your ECU: part number 51805375 and marking MJD 6F3.Y1. If the numbers match, the ECU fits – the car model alone does not decide this.
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Does the Virgin MJD 6F3.Y1 need programming?
No. After fitting, ECU 51805375 codes itself to the car and immobiliser. The condition is a working immobiliser and a matching part number.
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What is the difference between IMMO OFF and Virgin?
With IMMO OFF the car runs, but a red immobiliser warning stays on the dashboard and a fault remains in diagnostics that cannot be cleared. The Virgin version does not have this fault, which is why we recommend it.
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How do you test ECU 51805375?
We check every unit on the bench and then fit it to our test car. The warranty is 6 months.
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