6G91-12A650-FJ (ESU-312) – used engine ECU
On this page you can buy an original Ford petrol engine ECU. It is a used part, tested before dispatch. Key markings: 6G91-12A650-FJ and ESU-312.
What happens after fitting?
After fitting, the ECU has to be programmed to the PATS immobiliser – FORScan or IDS will do. You can also ask us to clone the data from your current ECU.
Other versions in stock
ECUs with different numbers – the number on your label decides: 6G91-12A650-CG ESU-412, 6G91-12A650-FG ESU-312, 6G91-12A650-CF ESU-412, 6G91-12A650-VC ESU-412.
How does an engine ECU fault show?
A faulty ECU can cause these symptoms:
- no communication with the control unit in diagnostics,
- limp mode and reduced power,
- faults from several sensors at once,
- engine does not start or stalls.
Note: the cause may also be sensors, injectors, power supply or wiring. A diagnosis before buying will rule this out.
Vehicle compatibility
Compare the label first: 6G91-12A650-FJ and ESU-312 must be the same as on your ECU. Confirmed application: Ford S-Max, Galaxy 2.0 16V Duratec-HE 107 kW (2006–2010). The list is open.
Numbers to compare with your ECU
| Label | Number (different formats) |
|---|
| Vehicle manufacturer number | 6G91-12A650-FJ / 6G9112A650FJ |
| Label code | ESU-312 / ESU312 |
| Label code | 4HCJ |
Warranty and contact
The ECU comes with a warranty: 6 months. More ECUs: Ford Engine Control Units (ECUs). Question about a number? Contact us.
Questions and answers: 6G91-12A650-FJ
| Question |
Answer |
| How do I know that 6G91-12A650-FJ will fit? |
The label of your ECU must show the same markings: 6G91-12A650-FJ and ESU-312. |
| Which cars use 6G91-12A650-FJ? |
We have confirmed it in: Ford S-Max, Galaxy 2.0 16V Duratec-HE 107 kW (2006–2010). The label number still decides. |
| What do I program ECU 6G91-12A650-FJ with? |
FORScan or IDS – the ECU requires PATS programming. Instead, you can order cloning of the data from your old ECU. |
| Is the ECU tested? |
Yes, it is a used part – we test every one before dispatch. |
