BMW E60 LCI E87 E90 120d 320d 520d N47 177HP ECU KIT DDE 7811700 CAS3 Key Manual

BMW E60 LCI E87 E90 120d 320d 520d N47 177HP ECU KIT DDE CAS3 Key Manual is a complete, used set from the Electronic control modules and ECUs category, designed for BMW vehicles with the N47 177 HP engine and manual transmission. The set includes the engine control unit (ECU) along with the CAS3 module and key, which allows for a consistent, technically correct replacement of the electronics responsible for starting and operating the power unit.

Specifications and technical data

• SKU: 7811700-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811700
• Substitutable numbers: 13618506199, 8506199, 13617811700, 7811700, 13618512587, 8512587, 0281015043, 61359147212, 9147212, 13617812500, 7812500, 13617812000, 7812000, 13617810000, 7810000, 13617809000, 7809000, 13617808401, 7808401, 13617807827, 7807827, 13617807530, 7807530, 13617807200, 7807200, 13617807142, 7807142, 13617806699, 7806699
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the set

The presented engine control unit set with the CAS3 module and key is dedicated to the BMW powertrain with the N47 177 HP unit, working with a manual transmission. Such a set allows for maintaining consistency between the engine control electronics and the immobilizer system, which is crucial when replacing the ECU in modern vehicles.

Combining the engine control unit with the CAS3 module and a matched key reduces the need for deep programming intervention, facilitating the adaptation process in a car with a similar configuration. This solution is particularly useful for repairs after an ECU failure, starting problems, or when it is necessary to restore proper communication within the vehicle's network.

Benefits of using a complete ECU with CAS3 and key

Using a complete set brings a number of practical benefits in the workshop and during vehicle operation:

• maintaining compatibility between the engine control unit and the vehicle's security system,
• reducing the risk of software conflicts between modules,
• facilitating diagnostics and configuration using factory service tools,
• the ability to efficiently restore proper starting after damage to the previous ECU.

For BMW vehicles with the N47 engine and manual transmission, such a set constitutes a coherent service solution that allows maintaining the power unit's operating characteristics in accordance with factory specifications.

Application in the BMW powertrain

In BMW cars with the N47 engine, the ECU is responsible for precise control of injection, boost, and power unit protection, while the CAS3 module works with the key regarding start authorization. Using a set matched to the manual transmission version allows for maintaining the correct logic of cooperation with the gearbox, start system, and vehicle security features.

Thanks to this, it is possible to maintain stable engine operation, correct communication with other modules in the vehicle, and preserve functions related to safety and comfort of use. A used set of this type, coming from the original BMW production line, is an attractive solution for workshops specializing in automotive electronics and for users looking for a technically consistent ECU replacement.

Selection by numbers and compatibility

When selecting an engine control unit with a CAS3 module and key, it is crucial to compare the OEM part number and available interchangeable numbers with the vehicle data. In this product, all relevant identifiers, such as OEM part number, interchangeable numbers, and SKU, are listed in the specification, which facilitates verification of compatibility with a specific BMW unit.

Additionally, thanks to the gearbox type designation and information about the brand and condition, you can precisely match the set to the vehicle configuration, minimizing the risk of incompatibility and additional programming costs.

Substantive support and further reading

If you want to better understand how used powertrain electronics affect the durability and handling characteristics of Bavarian models, it is worth reaching out for specialized materials. Practical tips on selecting original, used BMW components, verification procedures, and working with OEM numbers can be found in the article BMW – sports performance and precision. How do original used parts extend the life of a Bavarian icon?.

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 controllers, engine management modules, or security systems, check the available parts in the BMW electronic control modules and ECUs category.

For a comparison of other manufacturers' approaches to maintaining brand character using original components, you can also read the article Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?, which shows how the proper selection of modules and equipment affects the final driving experience.