BMW E87 E90 118i 318i N46 129HP ECU Kit DME 7565300 + CAS3 + Key Automatic

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E87 E90 118i 318i N46 129HP ECU Kit DME + CAS3 + Key Automatic is a complete control kit designed for petrol versions of BMW with an automatic transmission, based on the 129 HP N46 engine. The set includes the DME engine control module, the CAS3 module, and a matched key, which allows for consistent, factory-standard cooperation of electronic components. This is a practical solution when replacing a damaged controller or performing advanced service work on the drivetrain electronics.

Specifications and technical data

• SKU: 7565300-10
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 12147565300, 7565300, 12147565301, 7565301, 0261201160, 6943834, 61356943834
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and function of the ECU DME + CAS3 + key kit

The presented kit belongs to the Electronic control modules and controllers group and is intended for BMW vehicles with a 129 HP N46 petrol engine, working with an automatic transmission. The combination of the DME controller with the CAS3 module and a paired key ensures consistent management of the ignition, immobilizer, and engine operating parameters. This makes it possible to restore the full functionality of the engine control system without the need for time-consuming adaptation of individual components.

Benefits of using a complete kit

Using a complete ECU DME kit with CAS3 and a key in a BMW E87/E90 118i/318i with an N46 engine provides a number of practical service benefits:

• consistency of elements within the immobilizer and engine control system,
• reduced risk of synchronization issues between modules,
• easier workshop operations when replacing a damaged controller,
• possibility to restore proper starting and stable operation of the power unit.

For vehicles with an automatic transmission, proper communication between the engine controller and other modules is particularly important, as it affects the smoothness of gear changes and the overall refinement of the drivetrain.

Technical characteristics in the context of the N46 engine and automatic transmission

The 129 HP N46 engine is a popular petrol unit used in the BMW 1 Series (E87) and 3 Series (E90) in 118i and 318i versions. The ECU DME + CAS3 + key kit has been configured for the specific requirements of this unit and for cooperation with an automatic transmission. It is responsible for:

• controlling combustion parameters and fuel injection in the petrol engine,
• managing ignition and engine protection,
• handling starting and key authorization functions via the CAS3 module,
• communication with other controllers in the vehicle within the onboard network.

Such a combination of elements allows for maintaining the factory logic of the drivetrain control system, which is particularly important during repairs in vehicles equipped with an automatic transmission.

Condition, origin, and assembly aspects

The offered kit comes from a BMW vehicle and is a used item, which allows for an economical restoration of the control system's efficiency while maintaining original OEM quality. In workshop practice, the DME + CAS3 + key set significantly simplifies the assembly process because it eliminates the need to match individual modules for the immobilizer. It is recommended that the installation and any necessary coding be performed by a service center with experience in working with BMW electronics, which will ensure proper integration with the rest of the vehicle's systems.

Expert support and selection of used electronics

When selecting a used ECU kit for a specific BMW, it is crucial to pay attention to the compatibility of markings, hardware and software versions, and vehicle configuration. A detailed discussion of the selection rules, compatibility verification, and practical assembly aspects can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

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 BMW electronic control modules and controllers category.