ECU 6G91-12A650-CG / ESU-412 – description
We sell a used, original Ford petrol engine ECU. Before we ship it, we test it. When choosing, compare the markings 6G91-12A650-CG and ESU-412 first.
Markings of ECU 6G91-12A650-CG
| Label | Number (different formats) |
| Vehicle manufacturer number | 6G91-12A650-CG / 6G9112A650CG |
| Label code | ESU-412 / ESU412 |
| Label code | 5AZG |
Each number is shown in several spellings, because that is how it appears on labels and in search engines.
Similar numbers
We also stock: 6G91-12A650-CF ESU-412, 6G91-12A650-FJ ESU-312, 6G91-12A650-FG ESU-312, 7M51-12A650-VC ESU-411. Choose the one whose number matches the label of your ECU.
When to suspect the ECU?
An ECU fault may be indicated by:
- limp mode and reduced power,
- faults from several sensors at once,
- engine does not start or stalls.
Sensors, injectors, power supply or wiring can cause similar symptoms – run a diagnosis before buying.
Application
Confirmed application of this number: Ford Mondeo IV, S-Max, Galaxy 2.0 Duratec-HE (2007–2010). The list is not closed – what matters is that the markings on your part’s label match: 6G91-12A650-CG and ESU-412.
Getting it running in the car
This ECU will not work without PATS (immobiliser) programming. You can do it with FORScan or IDS. Alternative on request: cloning the data from your old ECU.
Contact and warranty
Not sure whether the number matches? Contact us. The ECU has a warranty – 6 months. Other ECUs: Ford Engine Control Units (ECUs).
6G91-12A650-CG – frequently asked questions
| Question |
Answer |
| How do I check whether the ECU fits? |
Compare the markings on your ECU’s label: 6G91-12A650-CG and ESU-412. |
| Which cars use 6G91-12A650-CG? |
We have confirmed it in: Ford Mondeo IV, S-Max, Galaxy 2.0 Duratec-HE (2007–2010). The label number still decides. |
| Does the ECU need programming? |
Yes, it requires PATS (immobiliser) programming with FORScan or IDS. On request, the data can be cloned from your old ECU. |
| Is the ECU tested? |
Yes, it is a used part – we test every one before dispatch. |
Rachid