51843365 MJD 6F3.PL – 1.3 Multijet engine ECU
Part number 51843365 identifies a Magneti Marelli MJD 6F3.PL 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.
Does this ECU fit your car?
MJD 6F3.PL ECUs were fitted to Fiat cars with the 1.3 Multijet engine. The model and year alone are not enough. Look at the label of your ECU: if it shows number 51843365 and type MJD 6F3.PL, it is the same version. A different part number is a different ECU.
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.
Typical symptoms of a faulty MJD 6F3.PL ECU
A damaged ECU can stop the engine from starting because the injectors receive no signal. The tester then cannot connect to the unit, and a measurement may show no power at the ECU despite good fuses. The failure can follow water ingress or a short circuit in the wiring.
The same symptoms can, however, come from a fault in the harness, power supply or sensors, so run a diagnosis before buying.
Label data of ECU 51843365
- Part number: 51843365
- ECU type: Magneti Marelli MJD 6F3.PL / MJD6F3.PL
- Hardware version: HW04P
The type may be written with a space (MJD 6F3.PL) or without it (MJD6F3.PL) – it is the same type.
Virgin version – no programming
We ship ECU 51843365 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: 51847815 MJD 6F3.HB, 51871694 MJD 6F3.G2, 51805368 MJD 6F3.D1, 51806500 MJD 6F3.Y3. The full range is in the Fiat engine ECU category, and the FPT page tells you more about the manufacturer.
Questions and answers – ECU 51843365
Does the Virgin MJD 6F3.PL need programming?
No. After fitting, ECU 51843365 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 51843365?
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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How do you test ECU 51843365?
We check every unit on the bench and then fit it to our test car. The warranty is 6 months.
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