55267355 MJD 8F3.X1 – 1.3 Multijet engine ECU
Part number 55267355 identifies a Magneti Marelli MJD 8F3.X1 ECU for the Fiat 500L 1.3 Multijet. Before shipping, we check it on the bench and in our test car.
Fitting without programming
Virgin Plug & Play means that once connected, the ECU adapts itself to the car and immobiliser. Two things are needed: the same part number (55267355) and a working immobiliser.
The IMMO OFF version is available on request, but it leaves a red immobiliser warning on the dashboard and a fault in diagnostics that cannot be removed without pairing with the immobiliser. Virgin has no such fault.
Symptoms that may point to an ECU failure
- Diagnostics cannot connect to the ECU.
- The engine will not fire, the injectors get no signal.
- The fault appeared after water got in or after a short in the harness.
- The ECU has no power despite working fuses.
The cause may also be the wiring, the power supply or a sensor. Diagnose first, then buy.
Does this ECU fit your car?
This ECU was removed from a Fiat 500L 1.3 Multijet. The model and year alone are not enough. Look at the label of your ECU: if it shows number 55267355 and type MJD 8F3.X1, 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.
- 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.
Numbers to compare with your label
The housing of the original ECU carries a sticker with its numbers. On this unit they are:
- Part number: 55267355
- ECU type: Magneti Marelli MJD 8F3.X1 / MJD8F3.X1
Useful links
Questions and answers – ECU 55267355
Is it enough to just fit ECU 55267355?
Yes, if the part number matches and the immobiliser works. After fitting, the Virgin version codes itself to the car and immobiliser, with no programming.
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Do you offer chip tuning, 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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What is the warranty on ECU 55267355?
The warranty is 6 months. Before dispatch, the ECU passes a bench test and a test in our test car.
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Can I clone my old ECU instead of the Virgin version?
Yes, cloning is included in the price of ECU 55267355. We need the data from your current unit.
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