How to choose ECU 51805368 MJD 6F3.D1
This is a working Magneti Marelli MJD 6F3.D1 engine control unit with part number 51805368, for the Fiat Doblo 1.3 Multijet. The unit is tested before dispatch. The housing has been refurbished – the electronics have not been repaired.
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.
Possible symptoms of a faulty ECU
- the engine does not start, no injector control,
- no communication with the ECU during diagnostics,
- no power supply to the ECU although the fuses are fine,
- failure after water ingress or a short circuit in the wiring.
These symptoms can also have other causes – wiring, power supply or sensors. Run a diagnosis before buying.
Vehicle compatibility
This unit comes from a Fiat Doblo 1.3 Multijet. Compatibility is decided by the part number on the label, not just by the model and year – compare number 51805368 and marking MJD 6F3.D1 with your ECU. A different part number means a different ECU version.
Numbers to compare with your label
The housing of the original ECU carries a sticker with its numbers. On this unit they are:
- Part number: 51805368
- ECU type: Magneti Marelli MJD 6F3.D1 / MJD6F3.D1
- Hardware version: HW03R
Virgin version – no programming
We ship ECU 51805368 as Virgin. After fitting, it codes itself to the car and immobiliser – no programming is needed, as long as the part number matches and the immobiliser works.
On request we prepare an IMMO OFF version. The car will drive, but a red immobiliser warning stays on the dashboard and a fault remains in diagnostics that you cannot clear without pairing with the immobiliser. That is why we recommend Virgin.
Looking for a different number? See also: 51806500 MJD 6F3.Y3, 51805375 MJD 6F3.Y1, 51784559 MJD 6F3.M3, 51854484 MJD 6F3.M5. The full range is in the Fiat engine ECU category, and the FPT page tells you more about the manufacturer.
Questions and answers – ECU 51805368
Does ECU 51805368 fit my car?
Check the label of your ECU: part number 51805368 and marking MJD 6F3.D1 and hardware version HW03R. If the numbers match, the ECU fits – the car model alone does not decide this.
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Is it enough to just fit ECU 51805368?
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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Do you offer EGR OFF and DPF OFF for this ECU?
Yes, these are paid extra options that we carry out on request before the ECU is shipped.
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