BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE 7803372 CAS3 Key

BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE CAS3 Key is a complete engine control kit for BMW vehicles equipped with the 122 HP M47N2 diesel engine. The set includes a DDE engine control unit, a CAS3 module, and a matched key, which facilitates the restoration of proper powertrain operation following an electronic failure. This solution is designed for users and workshops seeking a consistent, factory-spec set of electronic components.

Specifications and technical data

• SKU: 7803372-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7803372
• Substitutable numbers: 13617808124, 7808124, 13617803372, 7803372, 13617801710, 7801710, 13617799854, 7799854, 13617798179, 7798179, 13617797496, 7797496, 13617797216, 7797216, 13617795844, 7795844, Control Unit, 0281013502 61356943814, 0 281 013 502 6943814
• Fuel type: Diesel
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU DDE CAS3 kit

The presented kit is dedicated to BMW 1 Series E87 118d and BMW 3 Series E90/E91 318d models equipped with the 122 HP M47N2 diesel engine and a manual transmission. The ECU DDE kit, along with the CAS3 module and key, is responsible for full engine control, start authorization, and communication with the immobilizer system.

Combining these elements into a single set minimizes the risk of electronic compatibility issues, which is particularly important when replacing the control unit in vehicles with advanced security systems.

Benefits of using a complete control kit

Using a complete ECU DDE kit with a CAS3 module and key provides a number of practical benefits during the repair process:

• consistency between engine electronics and the security system,
• minimizing the need for programming,
• easier diagnostics and configuration compared to replacing individual modules,
• maintaining proper cooperation with the vehicle's electrical installation.

As a result, this kit is particularly useful for major engine electronic faults, damage caused by short circuits, or communication issues between the control unit and the CAS module.

Technical specifications and compatibility

The offered kit comes from the Electronic control modules and ECUs category, meaning it is designed to operate in the demanding environment of the engine bay and vehicle wiring. Its adaptation to the diesel engine and compatibility with manual transmissions make the kit suitable for typical BMW 118d and 318d configurations with the M47N2 unit.

The presence of the OEM part number and interchangeable numbers in the technical specification allows for precise matching of the kit to a specific vehicle version. Before purchasing, it is recommended to compare the markings with the vehicle's factory data or consult a diagnostician to confirm full compatibility.

Condition, origin, and service application

The kit comes from a BMW vehicle and is a used item, making it an attractive cost-effective alternative to new components. For workshops specializing in the BMW brand and for informed users, it provides a practical solution for:

• repairs following engine control unit damage,
• immobilizer and key authorization issues,
• replacing complete control electronics after a collision or flooding.

A properly selected ECU DDE kit with CAS3 and key allows for shorter repair times and reduces the number of potential points of incompatibility in the vehicle's electronic system.

Expanding BMW electronic repairs

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional control units, comfort modules, or engine management systems, check out the available parts in the BMW electronic control modules and ECUs category.

For a comparison of approaches to using original, used components in premium car service, it is worth reading an article describing how to preserve the brand's character using OEM components – more information can be found in the material Audi and pure emotion – how used parts help maintain the brand's DNA.