BMW E81 E82 E88 N43 118i 143HP ECU Unit Kit DME CAS3 7640015 Lock + Key Manual

BMW E81 E82 E88 N43 118i 143HP ECU Unit Kit DME CAS3 Lock + Key Manual is a complete engine control kit designed for petrol versions of the BMW 1 Series with the N43 engine and manual transmission. The set includes the DME engine control unit along with the CAS3 module, lock, and key, which facilitates matching the electronics to a specific vehicle. It is a practical solution for workshops and users looking for a consistent, factory-spec control system.

Specifications and technical data

• SKU: 7640015-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7640015
• Substitutable numbers: 12147599881, 7599881, 12147583225, 7583225, 12147640015, 7640015, 12147621178, 7621178, 5WK93643, 61359147195, 9147195
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME CAS3 kit

The presented control kit is dedicated to BMW 1 Series E81, E82, and E88 models with the 143 HP N43 unit and manual transmission. It contains components responsible for managing the petrol engine's operation and start authorization, making it a coherent electronic system ready for installation in a vehicle with the appropriate configuration.

Combining the DME controller with the CAS3 module, lock, and key allows for maintaining compatibility between the engine electronics and the immobilizer system. Such a set minimizes the risk of vehicle starting issues after replacing the controller and facilitates the adaptation process in the car.

Benefits of using a complete control kit

Using a complete ECU kit with the CAS3 module and key is particularly beneficial when replacing a damaged controller or resolving immobilizer issues. Instead of selecting individual modules, the user receives a consistent package where the elements are already logically linked.

The main advantages of this solution include:

• consistency of the electronics responsible for starting and operating the petrol engine,
• reduction of the need for additional programming compared to replacing individual modules,
• easier diagnostics and configuration in cars with manual transmission,
• preservation of the factory logic of the security system.

For workshops specializing in the BMW brand, such a kit is a convenient and effective tool for restoring the efficiency of the engine control system in E8x series vehicles.

Application in the N43 petrol engine and manual transmission

The N43 engine is a modern petrol unit where the DME controller is responsible for precise management of operating parameters, such as fuel dosage, ignition, or cooperation with other vehicle systems. The kit has been prepared for a configuration with a manual transmission, which is important for how the controller communicates with other modules in the vehicle.

Selecting a kit compatible with the fuel type and transmission type is crucial for the proper operation of the vehicle. A properly matched control set helps avoid communication errors between modules and facilitates subsequent service maintenance.

Category and compatibility with BMW electronics

The product belongs to the Electronic control modules and controllers group, which means it is a component responsible for processing signals and managing the operation of key vehicle systems. In the case of this set, it primarily concerns engine control and start authorization in BMW 1 Series E8x generation cars.

If you are planning a comprehensive repair or upgrade of the engine control area in your BMW and need other components from the same group, such as additional controllers, management modules, or systems cooperating with the powertrain, check the available parts in the BMW electronic control modules and controllers category.

Condition, selection, and practical installation tips

The set comes from a used vehicle, which is a typical solution for original BMW electronic modules. Used controllers and modules retain factory specifications, and when properly selected for a specific engine and transmission version, they can operate in the vehicle for a long time.

Before installation, it is recommended to:

• verify the compatibility of the kit with the specific body and engine version,
• check the vehicle configuration regarding the transmission type,
• perform diagnostics after installation to confirm correct communication between modules.

For users and workshops who want to consciously use used electronics, additional guide materials may be useful. It is worth reading the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses the principles of selecting and operating these types of components.