AG91-12A650-ZG / 28278423 – Ford 2.0 TDCi engine control unit
We offer an ECU from the Delphi DCM3.5 family, marked with Ford number AG91-12A650-ZG and Delphi number 28278423. It was fitted to Fords with the 2.0 TDCi engine. Before we ship the ECU, we check that it works.
PATS programming and VIN preparation
- VIN preparation included: data from the Ford server and the latest software.
- You send us the VIN after purchase.
- PATS programming (keys + VIN) with FORScan or Ford IDS is required after fitting – the ECU is not plug & play.
- Warranty: 6 months.
How to check compatibility
The safest way is to compare labels. If your ECU shows number AG91-12A650-ZG and number 28278423, 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.
Numbers on the label
- Ford number: AG91-12A650-ZG / AG9112A650ZG
- Delphi number: 28278423
- ECU type: Delphi DCM3.5
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.
Useful links
Full range in this group: Ford Engine Control Units (ECUs).
Frequently asked questions about ECU AG91-12A650-ZG 28278423
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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Who carries out PATS programming of ECU AG91-12A650-ZG?
You can do it yourself with FORScan and a suitable interface or with Ford IDS. If you do not have these tools, a workshop that services Fords can do the PATS programming.
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What is the warranty on ECU AG91-12A650-ZG?
The warranty is 6 months. We test every unit before dispatch.
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What do I need to send after buying ECU AG91-12A650-ZG?
Just your Ford’s VIN. Based on it, we prepare the ECU with data from the Ford server and the latest software.
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