51871703 MJD 8F2.A3 – 1.3 Multijet engine ECU
Part number 51871703 identifies a Magneti Marelli MJD 8F2.A3 ECU for the Alfa Romeo MiTo 1.3 Multijet. Before shipping, we check it on the bench and in our test car.
Choose by part number
This ECU was removed from a Alfa Romeo MiTo 1.3 Multijet. We match these ECUs by part number only, because the version is decided by the number, not by the MJD 8F2.A3 type alone. Number 51871703 on your label must match the number of this unit.
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.
Part number and ECU type
The part number on the label is what matters most when ordering:
- Part number: 51871703
- ECU type: Magneti Marelli MJD 8F2.A3 / MJD8F2.A3
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.
Looking for a different number? See also: 51880760 MJD 8F2.F4, 51879337 MJD 8F2.D2, 51872449 MJD 8F2.I2, 51904061 MJD 8F2.G1. The full range is in the Alfa Romeo engine ECU category, and the FPT page tells you more about the manufacturer.
FAQ: 51871703 (MJD 8F2.A3)
Does ECU 51871703 fit my car?
Check the label of your ECU: part number 51871703 and marking MJD 8F2.A3. If the numbers match, the ECU fits – the car model alone does not decide this.
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Does the Virgin MJD 8F2.A3 need programming?
No. After fitting, ECU 51871703 codes itself to the car and immobiliser. The condition is a working immobiliser and a matching part number.
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Do you offer EGR OFF and DPF OFF for this ECU?
Yes, these are paid extra options that we carry out on request before the ECU is shipped.
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How do you test ECU 51871703?
We check every unit on the bench and then fit it to our test car. The warranty is 6 months.
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