BMW E87 E90 E91 118i 318i N46 129HP ECU KIT DME CAS2 Key 7561834 Manual Gearbox

BMW E87 E90 E91 118i 318i N46 129HP ECU KIT DME CAS2 Key Manual Gearbox is a complete electronic set from the Electronic control modules and ECUs category, designed for BMW vehicles with the N46 engine, 129 HP output, and a manual gearbox. The set includes the DME engine control unit, the CAS2 module, and a matched key, which facilitates the restoration of proper drivetrain operation following an electronic failure. This solution allows for a cohesive replacement of control components without the need to source individual modules separately.

Specifications and technical data

• SKU: 7561834-11
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7561834
• Substitutable numbers: 12147561834, 7561834, 12147565300, 7565300, 12147565301, 7565301, 12147557290, 7557290, 12147557930, 7557930, 0261201159, 61356943791, 6943791
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application of the ECU DME CAS2 set with key

The presented set is dedicated to BMW 1 Series E87 and 3 Series E90 and E91 models with the 129 HP N46 unit, paired with a manual gearbox. The combination of the DME controller, CAS2 module, and key ensures the integrity of the immobilizer system, which is crucial when replacing a faulty engine control unit or addressing start authorization issues. A set configured in this way helps reduce diagnostic and programming time, as the main components of the security and engine control system are already synchronized. This is a practical solution both for workshops specializing in the BMW brand and for users looking for a technically matched set.

Construction and function of individual components

The DME controller is responsible for the precise management of the N46 engine – including fuel injection, ignition, and communication with sensors and actuators. The CAS2 module acts as the central element of the authorization system, communicating with the key and the engine controller to allow the vehicle to start only after successful identification. The presence of a matched key in the set minimizes the risk of immobilizer synchronization problems, which in practice translates into more efficient installation and shorter vehicle downtime at the service center. The set as a whole constitutes a coherent electronic system that, after proper installation and configuration, restores full engine starting and operating functionality.

Benefits of using a complete ECU KIT

Choosing a complete ECU KIT instead of a single engine controller reduces the need for deep interference with the vehicle's software. The cohesion of the DME, CAS2, and key reduces the risk of coding mismatches, immobilizer errors, or data bus communication issues. For workshops, this means a more predictable repair process, and for the user – a better chance of quickly restoring the vehicle's performance. The set is particularly useful in situations where multiple electronic components have failed simultaneously or when the history of previous vehicle software modifications is unknown.

Professional selection and installation

Due to the specific nature of BMW electronics and the integration of the engine controller with security systems, installation by a workshop with experience in working with the BMW brand and appropriate diagnostic software is recommended. Proper configuration of the set allows you to fully utilize its potential and avoid secondary faults related to communication between modules. If you are planning a comprehensive repair or upgrade of your BMW's engine electronics and need other components from the same group, such as additional controllers, comfort modules, or engine management systems, check out the available parts in the BMW electronic control modules and ECUs category.

More about used BMW electronics

When choosing a used ECU set, it is worth knowing the basic principles of selecting and verifying automotive electronics to avoid compatibility and programming issues. Practical tips on when it is worth opting for used engine controllers, comfort modules, or sensors can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. If you want to more precisely match electronic components to the specific configuration of your premium car, the guide How to select original used parts for BMW, Audi, and Mercedes using the VIN number?, which describes practical methods for verifying component compatibility, may also be helpful.