How to choose ECU AG91-12A650-AGG for your Ford
This is a Delphi DCM3.5 engine control unit with Ford number AG91-12A650-AGG and number 28278448, used in Ford vehicles with the 2.0 TDCi engine. The unit is tested before dispatch.
Choose by number, not by model
Fords with the 2.0 TDCi engine used many versions of the DCM3.5 ECU, and one version could go into several models. That is why you should choose the ECU by its numbers only: Ford AG91-12A650-AGG and Delphi 28278448 must match your unit. If in doubt, send us a photo of the label before ordering.
Preparation and fitting
- After purchase, send us your VIN – we prepare the ECU with data from the Ford server and the latest software. This service is included in the price.
- The ECU is not plug & play: after fitting it requires PATS programming (keys and VIN) with FORScan or Ford IDS.
- Warranty: 6 months.
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.
Keep in mind that the cause may also be the wiring, the power supply or a sensor. Diagnose first, then buy.
Numbers on the label
- Ford number: AG91-12A650-AGG / AG9112A650AGG
- Delphi number: 28278448
- ECU type: Delphi DCM3.5
We describe the replacement and programming in our guide Ford DCM3.5 ECU replacement and VIN programming. Other numbers are in the Ford DCM3.5 ECU collection, and more about the manufacturer on the Delphi page.
Other DCM3.5 ECUs in our range: AG91-12A650-AHF (28270075), AG91-12A650-XF (28270044), AG91-12A650-YF (28270047), AG91-12A650-YG (28278416).
Full range in this group: Ford Engine Control Units (ECUs).
Frequently asked questions about ECU AG91-12A650-AGG 28278448
Does ECU AG91-12A650-AGG fit my Ford?
Check the label of your ECU: Ford number AG91-12A650-AGG and number 28278448. The same number is used in several Ford models, so the number decides, not the model and year.
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Is ECU AG91-12A650-AGG plug & play?
No. After fitting, PATS programming is required – the keys and VIN are assigned 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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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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