Delphi DCM3.5 ECU BG91-12A650-RJ – what to know
Unit BG91-12A650-RJ (Delphi 28334095) controls the 2.0 TDCi engine in Ford cars. We test every unit before sending it to the customer.
Typical symptoms of a faulty DCM3.5 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 you buy an ECU.
Label data of ECU BG91-12A650-RJ
- Ford number: BG91-12A650-RJ / BG9112A650RJ
- Delphi number: 28334095
- ECU type: Delphi DCM3.5
The Ford number may be written with dashes (BG91-12A650-RJ) or without them (BG9112A650RJ) – it is the same number.
Fitting step by step
- After purchase, you send us the VIN.
- We prepare the ECU with data from the Ford server and the latest software – included in the price.
- You fit the ECU in the car.
- You carry out PATS programming (keys and VIN) with FORScan or Ford IDS, or have a workshop do it.
Warranty on the ECU: 6 months.
How to check compatibility
The safest way is to compare labels. If your ECU shows number BG91-12A650-RJ and number 28334095, it is the same version – whatever the Ford model and year, as this number may appear in different cars. If the sticker is hard to read or you have questions, send us a photo of it before buying.
Useful links
Full range in this group: Ford Engine Control Units (ECUs).
Questions and answers – ECU BG91-12A650-RJ
Can I just fit ECU BG9112A650RJ and start the car?
No. The ECU is not plug & play – after fitting, PATS programming is needed, which means assigning the keys and VIN with FORScan or Ford IDS.
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Is VIN preparation charged extra?
No, it is included in the price. Send us your VIN after purchase – we prepare the ECU with data from the Ford server and the latest software.
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Can I program ECU BG91-12A650-RJ myself?
Yes, if you have FORScan with a suitable interface or access to Ford IDS. Otherwise, PATS programming can be done by a workshop that services Ford vehicles.
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Why give the VIN after ordering?
The VIN lets us prepare the ECU for your car with data from the Ford server and the latest software. The service is included in the price.
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