BMW E87 LCI E90 E91 N43 170HP Engine Control Unit ECU KIT DME 7599881 Automatic

BMW E87 LCI E90 E91 120i 320i Petrol N43 170HP ECU KIT DME CAS3 + Key is a complete kit from the Electronic Control Modules and Controllers category, designed for BMW 1 and 3 Series petrol engines with the N43 unit producing 170 HP. The kit ensures consistency between the drive control and immobiliser elements, facilitating professional repair or replacement of the control system in the vehicle.

Specifications and technical data

• SKU: 7599881-11
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 12147599881, 7599881, 12147583225, 7583225, 12147640015, 7640015, 12147621178, 7621178, 5WK93729, 61359217853, 9217853, 61303422724, 3422724
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Intended Use and Compatibility

The presented control kit is dedicated to models BMW 1 Series E87 LCI 120i and BMW 3 Series E90 / E91 320i with the N43 petrol engine producing 170 HP. Using a single, complete kit of DME, CAS3 module, and key allows for maintaining consistency of the security and engine control system, which is particularly important when replacing components in vehicles equipped with advanced electronics.

Construction of the ECU KIT DME CAS3 + Key Set

The kit includes the Engine Control Unit (DME), the CAS3 Comfort and Immobiliser Module, and a matched key. This configuration enables:

• maintaining compatibility between the engine controller and the immobiliser system,
• minimising the need for programming to the essential minimum,
• efficient diagnostics and configuration in a workshop specialising in the BMW brand.

Thanks to this kit, the original operating logic of the drive control system in petrol-engined cars can be restored in an organised manner, promoting stable operation of the N43 unit.

Application in the N43 Petrol Engine

The N43 engine is a modern petrol unit where precise control of fuel injection, ignition, and auxiliary equipment plays a crucial role. The complete ECU KIT DME CAS3 + Key ensures consistent management of these functions, which translates to:

• correct cooperation with the injection and ignition systems,
• stable operation at idle and under load,
• the possibility of maintaining factory operating parameters for the petrol engine.

A correctly selected control module is key to restoring full vehicle functionality after an electronic failure or when replacing a damaged controller.

Benefits of Using a Complete Kit

Choosing a complete control kit for BMW offers a range of practical benefits for the workshop and the vehicle owner:

• System Consistency – The DME, CAS3, and key come from a single kit, making integration with the existing vehicle installation easier.
• Time Savings – Reduced number of programming and adaptation operations compared to replacing individual modules.
• Higher Predictability of Repair Outcome – Lower risk of conflicts between the engine controller and the security system.
• Solution Tailored to a Specific Fuel Type – The kit is designed for petrol engines, eliminating problems arising from the use of incorrect controllers.

Condition and Application in Professional Service

The product comes from the used Electronic Control Modules and Controllers segment, making it an attractive cost-effective alternative while maintaining original BMW specifications. The kit is particularly recommended for workshops specialising in automotive electronics, which have the appropriate diagnostic facilities for configuring controllers and performing adaptations in the vehicle.

If you need other BMW Electronic Control Modules and Controllers, check out our dedicated category: BMW Electronic Control Modules and Controllers.

Knowledge and Support for Working with Electronics

Working with advanced control electronics requires a proper approach, especially when using used components. It is worth familiarising yourself with best practices related to selecting and installing such elements – material on our blog may be helpful: Audi and Pure Emotion – How Used Modules and Other Parts Help Maintain the Brand's DNA. Although it concerns a different brand, it addresses universal issues related to the use of original, used electronic components in modern cars.

For those interested in the broader use of used components in modernisation projects and performance enhancement, we also recommend the article: Tuning with Used Parts – How to Gain Performance Without Losing a Fortune, which discusses a safe approach to vehicle modification using proven components.