BMW E87 E90 E91 118i 318i Petrol N46 ECU Kit Control Unit DME 7565300 CAS3 Keys

BMW E87 E90 E91 118i 318i Petrol N46 ECU Kit Control Unit DME CAS3 Keys is a complete petrol engine control kit, including the DME module, CAS3 module, and matched keys. This package is particularly useful when replacing engine electronics in BMW 1 Series and 3 Series models with the N46 unit, where a consistent configuration of the immobilizer and control unit is required. Thanks to the maintained compatibility of the components, the kit facilitates the restoration of proper powertrain operation and vehicle starting.

Specifications and technical data

• SKU: 7565300-9
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 12147565301, 7565301, 12147565300, 7565300, 0261201160, 61356943834, 6943834
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Application of the ECU DME CAS3 kit with keys

The presented kit belongs to the Electronic control modules and ECUs group and is intended for BMW vehicles with a petrol engine. In practice, this means the possibility of a comprehensive replacement of the engine control unit along with the security module and keys in situations where:

• the original DME controller has suffered electronic damage,
• there are communication problems between the engine controller and the CAS module,
• it is necessary to replace the complete starting system due to failure or loss of keys,
• the vehicle requires a matched set of electronics after accident repairs or an engine swap. Combining the DME controller, CAS3 module, and keys into one package reduces the risk of software incompatibility and starting authorization issues, which is crucial for the stable operation of the powertrain in modern BMWs.

Construction and function of individual components

The kit includes several cooperating components that form a coherent vehicle control and security system:

• DME Engine Controller – responsible for precise management of the N46 petrol unit, including fuel injection, ignition, and monitoring of key sensors and actuators.
• CAS3 Module – acts as an advanced access and authorization system, working with the keys and the engine controller to control starting and vehicle security.
• Keys – are electronically linked to the CAS3 module and the DME controller, which allows for maintaining the consistency of the immobilizer system without the need for time-consuming programming from scratch. This configuration is particularly beneficial when replacing electronics in petrol vehicles, where synchronizing all elements of the security system has a direct impact on the ability to start the car and the proper operation of onboard systems.

Benefits of using a complete ECU kit

Choosing a complete ECU kit with a CAS3 module and keys offers a number of practical advantages compared to replacing individual elements:

• reducing the need for advanced programming and adaptation of the engine controller and immobilizer,
• increased chance of quickly restoring vehicle starting after an electronics failure,
• consistency of configuration between the engine controller, CAS module, and keys,
• the possibility of effective vehicle repair using a used, tested kit. For workshops specializing in the BMW brand and for informed users, this means shorter diagnostic and installation time, as well as real cost savings compared to purchasing new components from an authorized dealer.

Condition, origin, and installation aspects

The offered kit comes from dismantling and is marked as a used BMW component, which allows for maintaining the factory performance characteristics of the controller compared to non-original replacements. Before installation, it is recommended to perform a standard verification of the vehicle's electrical system, ground connections, and power supply correctness to rule out secondary damage to the newly installed module. In practice, the installation of such a kit should be entrusted to a workshop with experience in BMW electronics, which facilitates the proper execution of adaptation procedures and any necessary software updates. This allows you to fully utilize the potential of the factory petrol engine control and restore the proper operation of the starting system.

Expanding knowledge and selecting other BMW modules

If you are planning a comprehensive repair or upgrade of the engine electronics area in your BMW and want to better understand the principles of operation of the engine controller, comfort modules, and the iDrive system, it is worth reaching for specialized materials. Practical tips on repairing the BMW engine controller, FRM modules, and the multimedia system can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using parts from dismantling?, which shows how to effectively use used electronic modules. If you are planning a comprehensive repair or upgrade of the engine electronics area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or powertrain management systems, check the available parts in the category BMW electronic control modules and ECUs.