BMW E87 116i E90 316i N45 116HP Engine ECU KIT DME 7557809 CAS2 2 Keys Manual

BMW E87 116i E90 316i N45 116HP Engine ECU KIT DME CAS2 2 Keys Manual is a complete engine control kit designed for selected BMW models with the N45 116HP engine and a manual transmission. The set includes the DME engine control unit, the CAS2 module, and two keys, allowing for seamless integration of the powertrain electronics and the immobilizer. This is a practical solution for workshops and users looking for a proven, factory-standard engine control system.

Specifications and technical data

• SKU: 7557809-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557809
• Substitutable numbers: 12147557809, 7557809, 12142461574, 2461574, 12147568427, 7568427, 12147564260, 7564260, 0261209085, 61356981416, 6981416, 61356943791, 6943791
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application and compatibility

The presented control kit is intended for BMW 1 Series E87 116i and BMW 3 Series E90 316i vehicles equipped with the 116HP N45 engine. Combining the DME controller with the CAS2 module and matched keys ensures the consistency of the security system and proper communication with the vehicle's electrical installation. The set is particularly useful when replacing the complete engine control system, where maintaining compatibility between the engine electronics and the immobilizer is required.

Construction of the ECU DME kit with CAS2

The ECU DME kit consists of an electronic engine control module responsible for managing fuel injection, ignition, and interaction with other vehicle systems. The CAS2 module acts as the central element of the access and starting system, communicating with both the keys and the engine controller. The inclusion of two keys allows for convenient daily use and provides a spare in case one is lost.

Manual transmission operation

The kit has been configured for use with a manual transmission, which is crucial for torque management logic, idle speed control, and clutch system interaction. Proper matching of the DME controller software to the manual gearbox ensures the correct operating characteristics of the N45 engine, smooth acceleration, and the proper functioning of driver assistance systems.

Benefits of using a complete kit

Using a complete ECU kit with CAS2 and keys reduces the need for time-consuming programming of individual components. In practice, this means:

• consistency between engine electronics and the immobilizer system,
• reduced risk of software conflicts between modules,
• easier diagnostics and configuration in the workshop,
• the ability to efficiently replace a damaged control system.

For vehicles with the 116HP N45 engine, such a kit provides a functional basis for restoring the proper operation of the power unit after a controller failure or issues with the CAS system.

BMW electronic control modules and controllers

If you are planning a comprehensive repair or upgrade of your BMW's engine area 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 controllers category.

Condition and service purpose

The offered kit comes from a used vehicle, making it an attractive service solution for cars where the original controller has been damaged or there are issues with the CAS system. A used set allows you to maintain the N45 unit's performance close to factory standards while reducing repair costs compared to purchasing new components. The kit is especially recommended for specialized workshops dealing with BMW electronics and for users working with an experienced automotive electrician.

More about the role of original modules in modern cars

If you are interested in how original electronic modules affect the behavior and character of modern premium cars, it is worth reading the article on our blog: Audi and pure emotion – how used modules and electronic parts help maintain the brand's DNA. Although it concerns the Audi brand, it clearly demonstrates the importance of factory controllers and modules in maintaining the correct vehicle operating parameters.