ECU 51806501 – what to know
We offer a working MJD 6F3.P6 unit (Magneti Marelli) with part number 51806501. It controls the engine of the Fiat 1.3 Multijet. We test every unit before dispatch. The housing has been refurbished – the electronics have not been repaired.
Choose by part number
MJD 6F3.P6 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.P6 type alone. Number 51806501 on your label must match the number of this unit.
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.
Virgin or IMMO OFF
- Virgin – Plug & Play: after fitting, the ECU codes itself to the car and immobiliser, no programming needed. Condition: matching part number and a working immobiliser.
- IMMO OFF on request: the car runs correctly, but a red immobiliser warning appears on the dashboard and a fault is stored in diagnostics that cannot be cleared without pairing with the immobiliser. The Virgin version does not have this 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.
Numbers on the label
- Part number: 51806501
- ECU type: Magneti Marelli MJD 6F3.P6 / MJD6F3.P6
- Hardware version: HW03P
Looking for a different number? See also: 51812866 MJD 6F3.H1, 51806506 MJD 6F3.PB, 51806497 MJD 6F3.P5, 51806508 MJD 6F3.P8. The full range is in the Fiat engine ECU category, and the FPT page tells you more about the manufacturer.
Questions and answers – ECU 51806501
How do I know that 51806501 will fit?
Check the sticker on your ECU. If it shows number 51806501 and type MJD 6F3.P6 and hardware version HW03P, it is the same version. The car model and year alone are not enough.
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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 51806501?
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 51806501?
We check every unit on the bench and then fit it to our test car. The warranty is 6 months.
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