How to choose ECU 51781564 MJD 6F3.P7
This is a working Magneti Marelli MJD 6F3.P7 engine control unit with part number 51781564, for the Fiat 1.3 Multijet. The unit is tested before dispatch. The housing has been refurbished – the electronics have not been repaired.
Does this ECU fit your car?
MJD 6F3.P7 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 51781564 and type MJD 6F3.P7, it is the same version. A different part number is a different ECU.
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.
What we check before dispatch
We first test ECU 51781564 on the bench and then fit it to our test car. Only a working unit is shipped. For an extra charge we carry out EGR OFF and DPF OFF. The warranty is 6 months.
Part number and ECU type
The part number on the label is what matters most when ordering:
- Part number: 51781564
- ECU type: Magneti Marelli MJD 6F3.P7 / MJD6F3.P7
- Hardware version: HW03P
Virgin version – no programming
We ship ECU 51781564 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.
Useful links
FAQ: 51781564 (MJD 6F3.P7)
Does ECU 51781564 fit my car?
Check the label of your ECU: part number 51781564 and marking MJD 6F3.P7 and hardware version HW03P. If the numbers match, the ECU fits – the car model alone does not decide this.
|
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.
|
Can I order extra services for ECU 51781564?
Yes, for an extra charge we carry out EGR OFF and DPF OFF. These options are done on request before dispatch.
|
How do you test ECU 51781564?
We check every unit on the bench and then fit it to our test car. The warranty is 6 months.
|
