BMW E87 E90 116i 316i N45 116HP Petrol ECU Kit DME 7545046 CAS 2 + Key Manual

BMW E87 E90 116i 316i N45 116HP Petrol ECU Kit DME CAS 2 + Key Manual is a complete engine control and immobilizer kit designed for selected BMW models with the N45 116 HP engine and manual transmission. The set includes a DME engine control unit, a CAS 2 module, and a matched key, which facilitates restoring the proper operation of the electronic system after a failure or engine replacement. This solution allows for consistent, technically correct integration of the powertrain electronics in petrol-powered vehicles.

Specifications and technical data

• SKU: 7545046-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7545046
• Substitutable numbers: 12142461574, 2461574, 12147545046, 7545046, 0261209016, 0 261 209 016, 61356943757, 6943757
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented control kit is dedicated to BMW 1 Series E87 and 3 Series E90 vehicles in 116i and 316i versions with the 116 HP N45 engine. The kit has been configured for petrol engines and manual transmissions, which is crucial for proper cooperation with the vehicle's installation and the ECU software.

Thanks to the fact that the DME, CAS 2 module, and key are included in one package, you minimize the risk of problems with component matching, immobilizer coding, or communication errors in the vehicle's bus. This is particularly important when replacing a damaged ECU or performing an engine swap.

Kit construction and function of individual elements

The kit includes three main components responsible for managing engine operation and start authorization:

• DME engine control unit – responsible for precise control of fuel injection, ignition, and engine accessory operation in the N45 unit,
• CAS 2 module – manages the immobilizer system, key authorization, and communication with other comfort and safety modules,
• key – factory-paired with the CAS 2 module and DME, which facilitates starting the vehicle after installing the kit.

Combining these elements into one package allows for maintaining data consistency in the security system, reduces the need for complex programming, and speeds up the repair process.

Application in the powertrain

In vehicles with the 116 HP N45 engine, the DME controller works with sensors and actuators responsible for fuel metering, ignition timing, and monitoring the operating parameters of the petrol unit. The kit has been prepared for fuel type: petrol, which ensures the correct control maps and operating logic for this configuration.

Integration with a manual transmission means that the ECU software takes into account the characteristics of manual gearboxes, including how functions such as idle speed control, clutch engagement response, or cooperation with driver assistance systems are implemented. This ensures correct driving dynamics and predictable vehicle behavior.

Benefits of using a complete ECU kit

Choosing a complete DME + CAS 2 + key kit brings a number of practical service benefits:

• immobilizer system consistency – all elements are interconnected, which reduces start authorization issues,
• reduced installation time – no need to match individual modules and keys,
• preservation of the factory control logic for the 116 HP N45 engine,
• possibility of effective repair after engine electronics damage or CAS issues.

For workshops specializing in the BMW brand, such a kit is a convenient solution that allows for shortening diagnostic and installation time and increasing the predictability of the final repair result.

Condition, verification, and technical aspects

The elements included in the kit belong to the Electronic control modules and ECUs category and are offered as used, which is a favorable compromise between repair costs and maintaining the manufacturer's original specifications. Before installation, a standard diagnostic procedure in the vehicle is recommended, including reading error codes, checking bus communication, and verifying power supply and ground connections.

For full compatibility, it is worth paying attention to the engine version, fuel type, and transmission type matching the vehicle's configuration. If necessary, the workshop can perform additional coding or adaptation to match the kit to a specific BMW 1 or 3 Series unit.

If you are planning a comprehensive repair or upgrade of the engine control area in your BMW and need other elements from the same group, such as additional controllers, comfort modules, or powertrain management systems, check the available parts in the BMW Electronic control modules and ECUs category.

For a better understanding of how original electronic modules affect the character and handling of a premium class car, you can read the article on our blog: Audi and emotions in their purest form – how original modules and controllers help maintain the brand's DNA, which shows the importance of properly selected components also in other premium segment brands.