How to choose ECU 51812864 MJD 6F3.Y3
This is a working Magneti Marelli MJD 6F3.Y3 engine control unit with part number 51812864, for the Lancia Ypsilon 1.3 Multijet. The unit is tested before dispatch.
Virgin or IMMO OFF
- Virgin – Plug & Play: after fitting, the ECU codes itself to the car and immobiliser, no programming needed. Condition: matching part number and a working immobiliser.
- IMMO OFF on request: the car runs correctly, but a red immobiliser warning appears on the dashboard and a fault is stored in diagnostics that cannot be cleared without pairing with the immobiliser. The Virgin version does not have this fault.
Part number and ECU type
The part number on the label is what matters most when ordering:
- Part number: 51812864
- ECU type: Magneti Marelli MJD 6F3.Y3 / MJD6F3.Y3
Preparation before dispatch
- Bench test.
- Fitting and check in our test car.
- On request, for an extra charge: EGR OFF and DPF OFF.
Warranty on the ECU: 6 months.
Symptoms that may point to an ECU failure
- Diagnostics cannot connect to the ECU.
- The engine will not fire, the injectors get no signal.
- The fault appeared after water got in or after a short in the harness.
- The ECU has no power despite working fuses.
The cause may also be the wiring, the power supply or a sensor. Diagnose first, then buy.
Choose by part number
This ECU was removed from a Lancia Ypsilon 1.3 Multijet. We match these ECUs by part number only, because the version is decided by the number, not by the MJD 6F3.Y3 type alone. Number 51812864 on your label must match the number of this unit.
Useful links
Frequently asked questions about ECU 51812864 MJD 6F3.Y3
How do I know that 51812864 will fit?
Check the sticker on your ECU. If it shows number 51812864 and type MJD 6F3.Y3, it is the same version. The car model and year alone are not enough.
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Is it enough to just fit ECU 51812864?
Yes, if the part number matches and the immobiliser works. After fitting, the Virgin version codes itself to the car and immobiliser, with no programming.
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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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What is the warranty on ECU 51812864?
The warranty is 6 months. Before dispatch, the ECU passes a bench test and a test in our test car.
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