BMW E60 LCI E90 E91 E92 325d 525d M57N2 Engine ECU KIT DDE 7805288 CAS3 + Key

BMW E60 LCI E90 E91 E92 325d 525d M57N2 Engine ECU KIT DDE CAS3 + Key is a complete engine control set designed for selected BMW models with the M57N2 unit. The set includes the DDE electronic control module, the CAS3 module, and a matched key, which enables consistent operation of the powertrain and the vehicle authorization system. This solution allows for a professional engine control unit replacement while maintaining the integrity of the security system.

Specifications and technical data

• SKU: 7805288-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805288
• Substitutable numbers: 13618509034, 8509034, 13617811151 13617806380 13617809941, 13617806987 13617806152 13618506951, 8506951 7806152 7806987, 7809941 7806380 7811151, 13617805288 13617808314 13617804845, 7804845, 7808314, 7805288, 61356943814, 6943814, 0281012994, 0 281 012 994, KZ
• Category: ECUs & Computer Modules

Purpose and function of the ECU DDE CAS3 + key set

The presented set is an item from the Electronic control modules and controllers category, responsible for managing the operation of the M57N2 diesel engine in BMW 3 and 5 series models after the facelift (LCI). The DDE module controls, among other things, fuel dosing, engine accessory operation, and monitors key performance parameters, while the CAS3 is responsible for start authorization and communication with the key. Combining these elements into one set minimizes the risk of electronics matching issues during replacement.

Benefits of using a complete set

Using a complete ECU set with the CAS3 module and key ensures software and immobilizer configuration consistency, which facilitates the adaptation process in the vehicle. In practice, this means reducing the need for deep programming and lower susceptibility to communication errors between the engine controller and the security system. For workshops and users, this means more predictable installation and a faster return of the vehicle to full efficiency.

The product comes from the BMW range, which translates into factory-fit compatibility with the electrical installation, wiring harnesses, and CAN network architecture of the given model. An original module from the same hardware and software family also provides a better chance of maintaining the full functionality of factory vehicle systems, such as advanced comfort features or diagnostics.

Technical aspects and compatibility

The ECU DDE set with CAS3 and key is particularly important in vehicles where the engine controller has been damaged or there are issues with immobilizer synchronization. Thanks to the presence of the OEM part number and an extensive list of interchangeable numbers, it is possible to precisely match the component to a specific car configuration. In practice, the workshop can verify compatibility based on hardware and software numbers, and then perform adaptation using appropriate diagnostic tools.

Due to the nature of control electronics, it is recommended that installation and configuration be performed by a service center experienced in working with DDE and CAS3 systems in BMW vehicles. This helps avoid bus communication problems, comfort system errors, or improper operation of the start/stop function. Used condition means that the item has been previously operated, so it is worth performing standard diagnostics and potential functional tests before installation.

Support with selection and OEM matching

To minimize the risk of incompatibility, it is recommended to select the set based on the OEM number and vehicle data, including the VIN. In practice, this allows you to verify whether a given version of the controller and CAS3 module will be suitable for a specific model year, engine version, and equipment level. For users who want to better understand the specifics of used electronics and the matching process, the Global Parts guide will be helpful: Used automotive electronics – ECU modules and second-hand sensors, which describes, among other things, compatibility issues, selection by VIN/OEM, and typical questions for the seller.

If you want to deepen your knowledge on the proper selection of electronic components and other parts by OEM number and vehicle data, it is worth using a practical step-by-step guide: how to choose the right car part by VIN and OEM number. This is particularly useful when working with advanced control modules, where parameter compliance is crucial for the proper operation of the entire system.

Other BMW Electronic control modules and controllers

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 transmission controllers, comfort modules, or additional ECU units, check the available parts in the BMW Electronic control modules and controllers category.