Engine ECU 51847815 (MJD6F3.HB) – description
On this page you can buy ECU 51847815, a Magneti Marelli MJD 6F3.HB unit intended for the Fiat 1.3 Multijet. It goes through a function test before dispatch. The housing has been refurbished – the electronics have not been repaired.
Typical symptoms of a faulty MJD 6F3.HB 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.
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 (51847815) 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.
What we check before dispatch
We first test ECU 51847815 on the bench and then fit it to our test car. Only a working unit is shipped. For an extra charge we carry out EGR OFF and DPF OFF. The warranty is 6 months.
Vehicle compatibility
MJD 6F3.HB ECUs were fitted to Fiat cars with the 1.3 Multijet engine. Compatibility is decided by the part number on the label, not just by the model and year – compare number 51847815 and marking MJD 6F3.HB with your ECU. A different part number means a different ECU version.
Label data of ECU 51847815
- Part number: 51847815
- ECU type: Magneti Marelli MJD 6F3.HB / MJD6F3.HB
- Hardware version: HW04P
The type may be written with a space (MJD 6F3.HB) or without it (MJD6F3.HB) – it is the same type.
Useful links
Common questions about ECU 51847815 MJD6F3.HB
How do I know that 51847815 will fit?
Check the sticker on your ECU. If it shows number 51847815 and type MJD 6F3.HB and hardware version HW04P, it is the same version. The car model and year alone are not enough.
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Is it enough to just fit ECU 51847815?
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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Should I choose Virgin or IMMO OFF?
We recommend Virgin. IMMO OFF lets you drive, but leaves a red immobiliser warning on the dashboard and a fault in diagnostics that you cannot clear without pairing with the immobiliser.
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Can I order extra services for ECU 51847815?
Yes, for an extra charge we carry out EGR OFF and DPF OFF. These options are done on request before dispatch.
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