How to choose ECU 55274938 MJD 9DF.B1
This is a working Magneti Marelli MJD 9DF.B1 engine control unit with part number 55274938, for the Fiat 500 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.
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.
Does this ECU fit your car?
This unit comes from a Fiat 500 1.3 Multijet. The model and year alone are not enough. Look at the label of your ECU: if it shows number 55274938 and type MJD 9DF.B1, it is the same version. A different part number is a different ECU.
Preparation before dispatch
- Bench test.
- Fitting and check in our test car.
- On request, for an extra charge: chip tuning, EGR OFF and DPF OFF.
Instead of the Virgin version, we can also clone your old ECU at no extra cost – we then need the data from your current unit. Warranty on the ECU: 6 months.
Label data of ECU 55274938
- Part number: 55274938
- ECU type: Magneti Marelli MJD 9DF.B1 / MJD9DF.B1
The type may be written with a space (MJD 9DF.B1) or without it (MJD9DF.B1) – it is the same type.
Useful links
Questions and answers – ECU 55274938
Does ECU 55274938 fit my car?
Check the label of your ECU: part number 55274938 and marking MJD 9DF.B1. If the numbers match, the ECU fits – the car model alone does not decide this.
|
Does the Virgin MJD 9DF.B1 need programming?
No. After fitting, ECU 55274938 codes itself to the car and immobiliser. The condition is a working immobiliser and a matching part number.
|
Can I order extra services for ECU 55274938?
Yes, for an extra charge we carry out chip tuning, EGR OFF and DPF OFF. These options are done on request before dispatch.
|
Is cloning ECU 55274938 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.
|
