51854490 MJD 6F3.PM – 1.3 Multijet engine ECU
Part number 51854490 identifies a Magneti Marelli MJD 6F3.PM ECU for the Fiat 1.3 Multijet. Before shipping, we check it on the bench and in our test car. The housing has been refurbished – the electronics have not been repaired.
Part number and ECU type
The part number on the label is what matters most when ordering:
- Part number: 51854490
- ECU type: Magneti Marelli MJD 6F3.PM / MJD6F3.PM
- Hardware version: HW04P
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.
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.
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.
Choose by part number
MJD 6F3.PM ECUs were fitted to Fiat cars 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.PM type alone. Number 51854490 on your label must match the number of this unit.
More units in the Fiat engine ECU category and on the FPT manufacturer page.
Similar numbers from this family: 51843365 MJD 6F3.PL, 51847815 MJD 6F3.HB, 51871694 MJD 6F3.G2, 51805368 MJD 6F3.D1.
Questions and answers – ECU 51854490
Does ECU 51854490 fit my car?
Check the label of your ECU: part number 51854490 and marking MJD 6F3.PM and hardware version HW04P. If the numbers match, the ECU fits – the car model alone does not decide this.
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Does the Virgin MJD 6F3.PM need programming?
No. After fitting, ECU 51854490 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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What is the warranty on ECU 51854490?
The warranty is 6 months. Before dispatch, the ECU passes a bench test and a test in our test car.
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