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 7565300 CAS3 Keys is a complete N46 petrol engine control kit, including the DME module, CAS3 module, and matched keys. This package is particularly useful for professional engine electronics replacement, where consistent matching of all ignition and control system components is required. Thanks to this solution, you can systematically restore the proper operation of the power unit in BMW 118i and 318i models.

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 and function of the ECU DME with CAS3 kit

The presented kit belongs to the Electronic control modules and controllers group and is designed for BMW vehicles with the N46 petrol engine. The set includes the DME engine controller, the CAS3 module responsible for start authorization, and keys matched to this system. This combination of components allows for maintaining the consistency of the immobilizer and ignition control system, which is crucial when replacing electronics in modern power units.

The system is dedicated to engines powered by petrol, which ensures proper operating maps, control logic, and communication with other vehicle modules. Using a complete kit minimizes the risk of problems with key synchronization, immobilizer errors, or lack of communication between modules.

Benefits of using the complete DME + CAS3 + keys kit

Choosing a ready-made engine controller kit with a CAS3 module and keys brings a number of practical advantages in the process of repairing or upgrading electronics:

• consistency of all security and start system components,
• reduction of the need for time-consuming programming and adaptation,
• easier diagnostics in case of previous engine starting problems,
• maintaining proper communication in the vehicle bus between the engine controller and the CAS3 module.

For workshops specializing in the BMW brand, such a kit is a convenient, technically organized solution that allows focusing on proper installation and basic configuration instead of time-consuming matching of individual modules.

Product characteristics and condition

The offered item is an original module from the BMW electronic control modules and controllers group, sourced from a used vehicle. Such components are frequently chosen for professional repairs because they retain factory operating logic and full compatibility with the electrical architecture of a given model. The used nature of the product allows for a more economical approach to repair while maintaining the high quality of workmanship typical of the BMW brand.

The kit is particularly useful in situations where the engine controller has been damaged, there are problems with the CAS3 module, or irregularities in the immobilizer operation. Using the complete DME + CAS3 + keys package enables the restoration of proper starting and stable operation of the power unit without the need to replace the entire wiring harness or other comfort modules.

Integration with the N46 petrol system

The N46 engine in 118i and 318i versions is a petrol unit where the DME controller is responsible for precise management of fuel dosage, ignition, and cooperation with the vehicle's auxiliary systems. Using a dedicated ECU kit for a petrol engine guarantees compliance with factory operating maps and proper support for sensors and actuators. Combined with the CAS3 module and matched keys, it creates a coherent system that, after proper installation and configuration, allows for stable vehicle operation.

During installation, it is recommended to use professional BMW diagnostics to verify communication in the vehicle network, clear any errors, and match the kit to the specific car configuration. Such an approach increases the reliability of the entire system and reduces the risk of the fault returning.

Repair expansion within BMW electronics

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 additional controllers, auxiliary modules, or power unit management systems, check the available parts in the BMW electronic control modules and controllers category.

For a better understanding of how properly selected used electronic modules affect the character and handling of a premium car, it is worth reading the article on our blog: Audi and pure emotion. How do used parts help maintain the brand's DNA?. Although the description concerns a different brand, it shows how important it is to use the right, original electronic components in modern vehicles.

If you are considering whether it is better to choose a new part, a replacement, or a used item in a given case, the following guide may also be helpful: Original, replacement, or used – which car parts are the most cost-effective?, where we discuss the cost and operational differences between individual solutions.