How to choose ECU 51862586 MJD 6F3.H1
This is a working Magneti Marelli MJD 6F3.H1 engine control unit with part number 51862586, for the Fiat Fiorino 1.3 Multijet. The unit is tested before dispatch. The housing has been refurbished – the electronics have not been repaired.
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.
Warranty and extra services
The ECU comes with a warranty of 6 months. Every unit passes a bench test and a test in our test car.
- Paid options on request: EGR OFF and DPF OFF.
Virgin version – no programming
We ship ECU 51862586 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.
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: 51862586
- ECU type: Magneti Marelli MJD 6F3.H1 / MJD6F3.H1
- Hardware version: HW04P
Vehicle compatibility
This unit comes from a Fiat Fiorino 1.3 Multijet. Compatibility is decided by the part number on the label, not just by the model and year – compare number 51862586 and marking MJD 6F3.H1 with your ECU. A different part number means a different ECU version.
Useful links
Frequently asked questions about ECU 51862586 MJD 6F3.H1
Does the Virgin MJD 6F3.H1 need programming?
No. After fitting, ECU 51862586 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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Can I order extra services for ECU 51862586?
Yes, for an extra charge we carry out EGR OFF and DPF OFF. These options are done on request before dispatch.
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What is the warranty on ECU 51862586?
The warranty is 6 months. Before dispatch, the ECU passes a bench test and a test in our test car.
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