BMW 3 5 Series E60 LCI E90 325d 525d M57N2 197HP ECU Kit DME CAS3 + Key 7806987

BMW 3 5 Series E60 LCI E90 325d 525d M57N2 197HP ECU Kit DME CAS3 + Key is a complete control kit designed for BMW powertrains with the 197 HP M57N2 engine. It includes a DME module, a CAS3 module, and a matched key, which significantly facilitates the restoration of engine electronics and authorization system functionality in 3 and 5 Series vehicles. This solution is particularly useful when replacing a damaged controller or the complete ignition electronics.

Specifications and technical data

• SKU: 7806987-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7806987
• Substitutable numbers: 13617809941, 7809941, 13618509034, 8509034, 13617811151 13617806380 13617806987 13617806152, 7811151 7806380 7806987 7806152, 13618506951 13617805288 13617808314 13617804845, 8506951 7805288 7808314 7804845
• Category: ECUs & Computer Modules

Application of the ECU DME CAS3 + Key kit

The kit is intended for BMW 3 Series E90 325d and BMW 5 Series E60 LCI 525d models with the 197 HP M57N2 engine. Combining the DME engine controller with the CAS3 module and a matched key allows for consistent management of the powertrain and the immobilizer system, which is crucial when replacing electronics after a failure, water damage, or communication issues within the vehicle's bus. A complete kit of this type minimizes the risk of incompatibility between the engine controller and the comfort/immobilizer module, which in practice reduces diagnostic time and speeds up the vehicle startup process after repair.

Benefits of using an original BMW module

The original kit from the Electronic control modules and controllers group ensures the preservation of factory engine operating logic, stable communication with other controllers in the vehicle, and correct operation of safety functions. Compared to cheap replacements, a used original allows you to maintain compatibility with the vehicle's software and reduce adaptation problems. In practice, this means, among other things, predictable powertrain behavior, proper cooperation with automatic or manual transmissions, as well as the correct operation of onboard systems that use data from the DME (e.g., traction systems or advanced diagnostic functions).

Professional selection by OEM and interchangeable numbers

When selecting such an advanced component as an ECU DME CAS3 kit with a key, it is crucial to match it by OEM number and available interchangeable numbers. This allows for precise verification of compatibility with a specific version of the M57N2 engine as well as the vehicle's year and equipment. Proper matching reduces the need for additional programming and lowers the risk of communication errors in the CAN network. If you want to learn more about the safe selection of used controllers and sensors, how to verify hardware and software compatibility, and best installation practices, it is worth checking out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Condition, installation, and service aspects

The product comes from dismantling and is offered as a used ECU kit, which is a reasonable compromise between repair costs and maintaining original BMW quality. The DME + CAS3 + key kit allows a service center or auto electrician to efficiently carry out the replacement without the need to source components from different places. In practice, installation involves physically replacing the modules and performing the necessary adaptation procedures in accordance with BMW service documentation. This allows for the restoration of full functionality of the ignition, key authorization, and engine control in 3 and 5 Series vehicles with the M57N2 unit.

Expansion of BMW electronics repair

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