Ford Territory SZ 2.7 TDCi Engine Control Unit ECU 5WS40864F-T | AR79-12A650-AG Genuine OEM (2011)
2011 Ford Territory SZ 2.7 TDCi Engine Control Unit ECU 5WS40864F-T / AR79-12A650-AG Genuine OEM
The Ford Engine Control Unit (ECU) 5WS40864F-T, carrying Ford part number AR79-12A650-AG, is a genuine OEM engine management computer designed for the 2011 Ford Territory SZ 2.7L V6 TDCi Turbo Diesel.
Manufactured by Continental/Siemens VDO using the SID204 engine management platform, this ECU controls every critical aspect of engine operation, including fuel injection, turbocharger management, common rail diesel injection, emissions systems, ignition strategy, and communication with the vehicle's electronic control modules. The SID204 ECU family is used on the Ford Territory SZ 2.7L diesel range, with AR79-12A650-AG listed as one of the original Ford part numbers.
Replacing a faulty ECU with the correct genuine OEM unit helps restore original factory performance, fuel economy, and reliable engine operation.
Product Specifications
| Specification | Details |
|---|---|
| Ford Part Number | AR79-12A650-AG |
| Continental / Siemens Number | 5WS40864F-T |
| ECU Platform | SID204 |
| Vehicle Manufacturer | Ford |
| Vehicle Model | Territory SZ |
| Engine | 2.7L V6 TDCi Turbo Diesel (276DT) |
| Fuel Type | Diesel |
| Production Year | 2011 |
| Module Type | Engine Control Unit (ECU / ECM) |
| Manufacturer | Continental / Siemens VDO |
| Condition | Genuine OEM Used Unit |
| Testing Status | Fully Tested |
| Warranty | 30 Days |
| Shipping | Worldwide Available |
Compatibility Table
| Make | Model | Generation | Engine | Year Range |
|---|---|---|---|---|
| Ford | Territory | SZ | 2.7L V6 TDCi Turbo Diesel (276DT) | 2011* |
| Ford | Territory TX | SZ | 2.7L Diesel | 2011–2012* |
| Ford | Territory TS | SZ | 2.7L Diesel | 2011–2012* |
| Ford | Territory Titanium | SZ | 2.7L Diesel | 2011–2012* |
*Compatibility depends on VIN, drivetrain (RWD/AWD), software calibration, emissions specification, and production date. Always match both part numbers 5WS40864F-T and AR79-12A650-AG before purchasing. Ford documentation and repair references identify AR79-12A650-AG as an original SID204 ECU used on the 2011–2017 Ford Territory SZ diesel platform.
What Does the Engine Control Unit Do?
The ECU continuously controls and monitors:
- Common rail diesel fuel injection
- Turbocharger boost management
- Engine timing calculations
- Air-fuel ratio optimization
- EGR system operation
- Diesel emissions control
- Accelerator pedal response
- Glow plug management
- Engine diagnostics
- Communication with ABS, BCM, and transmission modules
A correctly functioning ECU ensures smooth engine performance, reliable starting, and efficient fuel consumption.
Common Symptoms of a Faulty ECU
A failing ECU may cause:
- Engine cranks but does not start
- Check Engine Light illuminated
- Injector control faults
- Engine misfires
- Reduced engine power
- Limp mode activation
- Poor fuel economy
- Communication errors with diagnostic tools
- Intermittent stalling
- Turbocharger performance issues
Repair specialists identify injector control failures and water damage as common issues affecting SID204 ECUs used in the Ford Territory SZ.
Why Buy from Automan Spare Parts?
Automan Spare Parts specializes in genuine OEM automotive electronic modules sourced from tested donor vehicles.
Benefits of Buying From Us
- Genuine OEM Ford Parts
- Fully Tested Before Dispatch
- Worldwide Express Shipping
- Competitive Prices
- Secure Protective Packaging
- Fast Order Processing
- Expert Compatibility Assistance
- 30-Day Warranty
Our inventory includes thousands of genuine automotive electronic modules, including ECUs, BCMs, TCMs, ABS modules, transfer case controllers, infotainment units, and body control modules for Ford, Toyota, Nissan, Honda, BMW, Mercedes-Benz, Land Rover, and many other manufacturers.
Installation Information
Before installation, please note:
- Immobilizer synchronization may be required.
- ECU programming or cloning may be necessary.
- VIN coding may be required depending on the vehicle.
- Professional installation is strongly recommended.
- Always verify the original part numbers before replacement.
Ford SID204 ECUs commonly require matching with the BCM, instrument cluster, and keys if a direct plug-and-play replacement is not possible.
Order Ford Territory ECU 5WS40864F-T Today
Restore your Ford Territory's performance with a Genuine OEM Engine Control Unit ECU 5WS40864F-T / AR79-12A650-AG from Automan Spare Parts.
If you're unsure about compatibility, simply send us your VIN number or clear photos of your existing ECU label, and our technical team will verify the correct replacement before you place your order.
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