Engine ECU 55259329 (MJD8F3.C3) – description
On this page you can buy ECU 55259329, a Magneti Marelli MJD 8F3.C3 unit intended for the Fiat 500 1.3 Multijet. It goes through a function test before dispatch.
Typical symptoms of a faulty MJD 8F3.C3 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.
Tests, options and warranty
- Every ECU is tested on the bench and fitted to our test car before dispatch.
- 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 extra options: chip tuning, EGR OFF and DPF OFF.
- Warranty: 6 months.
Virgin version – no programming
We ship ECU 55259329 as Virgin. After fitting, it codes itself to the car and immobiliser – no programming is needed, as long as the part number matches and the immobiliser works.
On request we prepare an IMMO OFF version. The car will drive, but a red immobiliser warning stays on the dashboard and a fault remains in diagnostics that you cannot clear without pairing with the immobiliser. That is why we recommend Virgin.
Numbers on the label
- Part number: 55259329
- ECU type: Magneti Marelli MJD 8F3.C3 / MJD8F3.C3
How to check compatibility
This unit comes from a Fiat 500 1.3 Multijet. The safest way is to compare labels: part number 55259329 and marking MJD 8F3.C3 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.
If your ECU has a different part number, check 55263694 MJD 8F3.QF, 51918363 MJD 8F3.F5, 55260726 MJD 8F3.D5, 55249217 MJD 8F3.X1 or the whole Fiat engine ECU category. About the manufacturer: FPT.
Frequently asked questions about ECU 55259329 MJD 8F3.C3
How do I know that 55259329 will fit?
Check the sticker on your ECU. If it shows number 55259329 and type MJD 8F3.C3, it is the same version. The car model and year alone are not enough.
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Can I order extra services for ECU 55259329?
Yes, for an extra charge we carry out chip tuning, EGR OFF and DPF OFF. These options are done on request before dispatch.
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How do you test ECU 55259329?
We check every unit on the bench and then fit it to our test car. The warranty is 6 months.
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Is cloning ECU 55259329 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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