BMW E60 LCI E90 E91 325d 525d Engine M57N2 197HP ECU Kit DDE 7806987 CAS3 + Key

BMW E60 LCI E90 E91 325d 525d Engine M57N2 197HP ECU Kit DDE CAS3 + Key is a factory electronic control unit from the Electronic control modules and controllers group, designed for advanced engine management in selected BMW models. It offers stable communication with the vehicle's electrical system and precise control of engine operating parameters, which translates into predictable vehicle behavior and proper cooperation with other onboard systems.

Specifications and technical data

• SKU: 7806987-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7806987
• Substitutable numbers: 13618509034 0281014436 61356943834, 8509034, 0 281 014 436, 6943834, 13617809941 13617811151, 13617806380 13617806987 13617806152, 13618506951 13617805288, 13617808314 13617804845, 7809941 7811151 7806380, 7806987 7806152 8506951, 7805288 7808314 7804845
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine computer is designed as a component of the engine management system in BMW 3 Series and 5 Series models from the 325d and 525d families after the LCI facelift. As an original module from the BMW range, it ensures consistency with the vehicle's electrical architecture, support for factory functions, and proper communication with other controllers in the vehicle's network.

The module is responsible for, among other things:

• controlling fuel dosage and the operation of the injection system,
• coordinating engine accessory operation depending on load and driving conditions,
• cooperating with safety and comfort systems via communication buses,
• monitoring engine operating parameters and recording diagnostic information.

Advantages of using an original BMW module

Using an original BMW engine computer instead of a damaged or unstable controller allows for restoring the proper operation of the powertrain without interfering with the factory control logic. This solution is particularly beneficial for users who expect:

• consistency with the vehicle's software and configuration – the module is designed for a specific BMW platform,
• preservation of factory engine operating parameters and cooperating systems,
• easier diagnostics at a service center thanks to compatibility with factory BMW tools,
• the possibility of matching by OEM number and interchangeable numbers, which facilitates the selection of the appropriate variant.

Operational characteristics and installation

As an element from the Electronic control modules and controllers category, the engine computer requires a professional approach to installation and configuration. In practice, this means the necessity of:

• selecting the appropriate version based on the vehicle's equipment and model year,
• performing adaptation or programming in accordance with BMW procedures,
• checking hardware and software compatibility with the existing installation.

The product is offered as a used item, which provides a cost-effective solution while maintaining the manufacturer's original specifications. In many cases, this allows for an economical vehicle repair without the need to resort to replacements with uncertain compatibility.

Selection by OEM number and interchangeable numbers

This engine computer has an assigned OEM part number and an extensive list of interchangeable numbers, which significantly facilitates matching the correct module to a specific BMW vehicle. When selecting, it is recommended to verify compatibility by the factory number, reference numbers, and vehicle data, such as model, generation, and equipment configuration.

To better understand the principles of selecting used controllers, the differences between hardware and software versions, and typical installation scenarios, it is worth using the guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Expansion and other BMW control modules

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or light controllers, check the available parts in the BMW electronic control modules and controllers category.

For renovation projects or upgrades of models from years similar to the E90/E91 and 5 Series, you can also find inspiring information about the use of used components in the article: The second life of a youngtimer – how used car parts rejuvenate cars from 1998–2012.

Summary

BMW E60 LCI E90 E91 325d 525d Engine M57N2 197HP ECU Kit DDE CAS3 + Key is an original module from the BMW range, designed for operation in an advanced engine control system. Thanks to its factory design and the possibility of selection by reference numbers, it is a practical solution for users who want to restore the proper operation of the powertrain electronics while maintaining the characteristics intended by the manufacturer.