How to choose ECU 55260733 MJD 8F3.QB
This is a working Magneti Marelli MJD 8F3.QB engine control unit with part number 55260733, for the Fiat Fiorino 1.3 Multijet. The unit is tested before dispatch.
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.
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.
- Cloning included: instead of the Virgin version we can transfer the data from your old ECU – the data from your current unit is required.
- Paid options on request: chip tuning, EGR OFF and DPF OFF.
Part number and ECU type
The part number on the label is what matters most when ordering:
- Part number: 55260733
- ECU type: Magneti Marelli MJD 8F3.QB / MJD8F3.QB
How to check compatibility
This unit comes from a Fiat Fiorino 1.3 Multijet. The safest way is to compare labels: part number 55260733 and marking MJD 8F3.QB must be the same as on your ECU. If the number differs, it is a different version – look for your number in the category or ask us.
Typical symptoms of a faulty MJD 8F3.QB 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.
If your ECU has a different part number, check 55255966 MJD 8F3.Q4, 55267355 MJD 8F3.X1, 55253513 MJD 8F3.X1, 51918358 MJD 8F3.F7 or the whole Fiat engine ECU category. About the manufacturer: FPT.
Questions and answers – ECU 55260733
How do I know that 55260733 will fit?
Check the sticker on your ECU. If it shows number 55260733 and type MJD 8F3.QB, it is the same version. The car model and year alone are not enough.
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Does the Virgin MJD 8F3.QB need programming?
No. After fitting, ECU 55260733 codes itself to the car and immobiliser. The condition is a working immobiliser and a matching part number.
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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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Is cloning ECU 55260733 charged extra?
No, cloning is included in the price. We transfer the data from your old ECU instead of preparing the Virgin version – we need the data from your current unit.
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