BMW E87 LCI E90 120i 320i N43 170HP Engine Unit ECU Kit DME 7599881 + CAS3 + Key

BMW E87 LCI E90 120i 320i N43 170HP Engine Unit ECU Kit DME + CAS3 + Key is a practical solution for workshops and users who need a verified engine electronics set. The kit comes from the Electronic control modules and ECUs group and is designed for petrol vehicles with an automatic transmission, which makes it easier to match to a specific car configuration. Thanks to the factory BMW architecture, the entire set allows for consistent powertrain operation without the need for tedious matching of individual modules.

Specifications and technical data

• SKU: 7599881-13
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 7599881, 12147599881, 7507228, 12147507228, 7580279, 12147580279, 7593667, 12147593667, 7575668, 12147575668, 7579144, 12147579144, 7599882, 12147599882, 7583227, 12147583227, 7593666, 12147593666, 7507227, 5WK93729, 9147220, 61359147220
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose of the BMW E87 LCI E90 120i 320i N43 170HP Engine Unit ECU Kit DME + CAS3 + Key

The offered set is dedicated to BMW 1 Series E87 LCI and 3 Series E90 models with the N43 170HP petrol engine and automatic transmission. The set includes the DME engine controller, the CAS3 module, and a matched key, which ensures the consistency of the immobilizer, engine electronics, and starting system. Such a combination is particularly useful when replacing a damaged controller, dealing with key authorization issues, or when it is necessary to transfer the complete control system to another body within the same generation.

Benefits of using a complete control kit

Using a complete BMW E87 LCI E90 120i 320i N43 170HP Engine Unit ECU Kit DME + CAS3 + Key in a BMW with an N43 engine brings a number of practical benefits:

• maintaining compatibility between the engine controller, immobilizer, and key,
• reducing the risk of starting and vehicle authorization problems after replacing electronics,
• facilitating workshop work during diagnostics and control system adaptation,
• the ability to restore full functionality of the powertrain without the need to program the entire system from scratch.

For vehicles with an automatic transmission, the proper cooperation of the engine controller with the powertrain is particularly important, which is why the completeness of the set has a direct impact on the operating culture, smoothness of gear changes, and stability of driving parameters.

Technical characteristics in the context of the N43 engine

The 170HP N43 engine is a modern petrol unit in which the DME controller is responsible for precise management of injection, ignition, and cooperation with onboard systems. In combination with the CAS3 module, it creates an integrated security and control system that:

• controls key authorization and start permission,
• communicates with the vehicle's CAN network,
• coordinates engine operation with the automatic transmission.

Thanks to this, the BMW E87 LCI E90 120i 320i N43 170HP Engine Unit ECU Kit DME + CAS3 + Key is particularly valuable for repairs where more than one electronic device has been damaged or when it is impossible to read data from the original controller.

Practical installation and diagnostic tips

When installing the set in a BMW E87 LCI or E90, it is recommended that the work be performed by a workshop with experience in BMW electronics and appropriate diagnostic tools. This allows for:

• verification of the vehicle's equipment compatibility with the used controller,
• checking communication in the vehicle network after installation,
• potential adaptation of parameters to the specific car configuration.

To better understand the principles of selecting and installing used controllers, it is worth reading the Global Parts guide on vehicle electronics – it discusses in detail selection by VIN and OEM numbers, hardware and software compatibility issues, and typical user questions: Used car electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Expanding the control system in BMW – related modules

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 engine controllers, comfort modules, or transmission controllers, check the available parts in the Electronic control modules and ECUs BMW category.

Well-chosen Electronic control modules and ECUs allow you to maintain the consistency of the entire vehicle management system, which translates into stable operation of the powertrain, correct operation of the automatic transmission, and proper communication with other comfort and safety systems.