Engine ECU 51854482 (MJD6F3.J2) – description
On this page you can buy ECU 51854482, a Magneti Marelli MJD 6F3.J2 unit intended for the Fiat 1.3 Multijet. It goes through a function test before dispatch. The housing has been refurbished – the electronics have not been repaired.
Fitting without programming
Virgin Plug & Play means that once connected, the ECU adapts itself to the car and immobiliser. Two things are needed: the same part number (51854482) and a working immobiliser.
The IMMO OFF version is available on request, but it leaves a red immobiliser warning on the dashboard and a fault in diagnostics that cannot be removed without pairing with the immobiliser. Virgin has no such fault.
Choose by part number
MJD 6F3.J2 units went into Fiat vehicles with the 1.3 Multijet engine. We match these ECUs by part number only, because the version is decided by the number, not by the MJD 6F3.J2 type alone. Number 51854482 on your label must match the number of this unit.
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.
Numbers on the label
- Part number: 51854482
- ECU type: Magneti Marelli MJD 6F3.J2 / MJD6F3.J2
- Hardware version: HW04P
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.
More units in the Fiat engine ECU category and on the FPT manufacturer page.
Similar numbers from this family: 51862586 MJD 6F3.H1, 51818295 MJD 6F3.B1, 51854490 MJD 6F3.PM, 51843365 MJD 6F3.PL.
FAQ: 51854482 (MJD 6F3.J2)
Does the Virgin MJD 6F3.J2 need programming?
No. After fitting, ECU 51854482 codes itself to the car and immobiliser. The condition is a working immobiliser and a matching part number.
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Should I choose Virgin or IMMO OFF?
We recommend Virgin. IMMO OFF lets you drive, but leaves a red immobiliser warning on the dashboard and a fault in diagnostics that you cannot clear without pairing with the immobiliser.
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Can I order extra services for ECU 51854482?
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 51854482?
The warranty is 6 months. Before dispatch, the ECU passes a bench test and a test in our test car.
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