BMW 1 3 Series E87 E90 N45 116i 316i Petrol ECU KIT DME 7550688 + CAS2 + Key

BMW 1 3 Series E87 E90 N45 116i 316i Petrol ECU KIT DME + CAS2 + Key is a complete electronic set designed for N45 petrol engines in BMW 1 Series E87 and 3 Series E90 models. The kit includes the DME engine control unit, the CAS2 module, and a matched key, facilitating a seamless configuration of the powertrain and vehicle authorization system. It is a practical solution for workshops and users who require a functional, factory-standard petrol engine control system.

Specifications and technical data

• SKU: 7550688-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7550688
• Substitutable numbers: 12147550688, 7550688, 12147568427, 7568427, 12147546880121475632781214754901912147557810, 7546880756327875490197557810, 12147563276121475506961214754664212147549021, 7563276755069675466427549021, 12147559418121475642661214755941412147550694, 7559418, 12147545046, 7545046
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented control kit has been developed for BMW 1 Series E87 116i and BMW 3 Series E90 316i vehicles with the N45 petrol engine. Combining the DME controller, CAS2 module, and key allows for maintaining electronic system consistency, which is particularly important when replacing the set in cars equipped with advanced security features and electronic powertrain management.

Function of the DME controller in a petrol engine

The DME controller in this set is responsible for the precise management of the petrol engine, including fuel dosing, ignition, and communication with other vehicle modules. This enables the N45 unit to maintain stable operation, correct response to load, and compliance with factory performance parameters. Using a dedicated controller for the petrol engine helps reduce issues with starting, rough idling, or communication errors within the vehicle's network.

Role of the CAS2 module and key

The CAS2 module included in the set works with the provided key to create a cohesive start authorization system. Such a set minimizes the risk of incompatibility between the engine controller and the immobilizer system, which is a common problem when replacing individual components. The DME + CAS2 + key kit allows the workshop to focus on correct installation and configuration without the need for tedious matching of individual components from different sources.

Application in service practice

A complete electronic set of this type is particularly useful in situations where the engine controller has been damaged, there are issues with the CAS2 module, or there is improper communication with the key. Using a single, consistent set facilitates diagnostics, shortens repair time, and reduces the number of potential points of failure. For professional service centers, this means a more predictable repair process, and for the user – a better chance of restoring the powertrain to its proper factory-specified operation.

Benefits of choosing an original BMW module

Choosing a set from the Electronic control modules and controllers category dedicated to specific BMW models allows you to maintain compliance with the vehicle's factory electrical architecture. The original design facilitates integration with the existing installation, limits the need for modifications, and promotes stable operation of all related systems, such as the ignition system, safety systems, or comfort features. This solution is particularly valued in cars where operational predictability and the ability to perform further diagnostics using factory tools are important. If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as DME controllers, CAS modules, or other electronic controllers, check the available parts in the BMW electronic control modules and controllers category. To compare how different manufacturers approach maintaining the brand's character and the role of original electronic modules in modern cars, it is worth reading the article on our blog Audi and pure emotion. How do used parts help maintain the brand's DNA?, which shows how important it is to use properly selected OEM components in premium class vehicles.