BMW E87 E90 116i 316i N45 1.6 116HP Petrol ECU KIT DME CAS2 Key 7550688

BMW E87 E90 116i 316i N45 1.6 116HP Petrol ECU KIT DME CAS2 Key is a complete petrol engine control kit, including the DME module, CAS2 module, and a matched key. The set is designed for BMW 1 Series E87 and 3 Series E90 models with the N45 1.6 engine, ensuring consistent, factory-spec management of engine operation and the immobilizer system. Thanks to the maintained compatibility of the components, it serves as a practical foundation for professional electronic system repairs.

Specifications and technical data

• SKU: 7550688-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7550688
• Substitutable numbers: 1214756842712147550688026120903661356964051, 75684277550688, 0261209036, 6964051, 12147550688, 7550688, 12147545046, 7545046
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented control kit is dedicated to BMW vehicles with the N45 1.6 petrol engine with 116 HP, used in models such as the 116i and 316i. The set includes the DME engine control unit, the CAS2 comfort and security module, and a key, which allows for maintaining the integrity of the vehicle's security system.

A set configured in this way enables efficient restoration of proper engine control system operation following electronic failure, controller damage, or immobilizer issues. The use of original BMW components promotes the maintenance of stable engine operating parameters and proper communication with other modules in the vehicle.

Kit composition: DME, CAS2, and key

The set contains three key electronic components that work together within the BMW vehicle architecture:

• DME engine control unit responsible for managing the petrol engine's operation,
• CAS2 module handling immobilizer functions and start authorization,
• a key matched to the CAS2 module and the controller.

Combining these elements into one set minimizes the risk of coding and synchronization issues that often arise when replacing individual modules. For workshops specializing in the BMW brand, this means reduced diagnostic time and a simplified installation and configuration process.

Practical service application

The ECU kit is primarily used for:

• repairs following engine controller damage in petrol vehicles,
• starting issues resulting from errors in the CAS2 system or immobilizer,
• the need to replace the control set after flooding, short circuits, or other wiring damage.

For users and service centers, it is important that the kit includes both the part responsible for engine logic and the security elements, which facilitates restoring full vehicle functionality without the need for deep software intervention. The Electronic control modules and controllers category includes exactly these types of solutions that integrate powertrain control with security systems.

Benefits of using an original BMW kit

Choosing an original ECU kit for the BMW E87 and E90 with the N45 engine brings a number of practical benefits:

• preservation of factory petrol engine control logic,
• consistency of the immobilizer system thanks to the matching of the DME, CAS2, and key,
• reduction of the need for additional programming compared to installing randomly selected modules,
• better compatibility with the existing electrical installation and other modules in the vehicle.

For workshops specializing in automotive electronics, this means a more predictable repair process, and for the end user – a better chance of stable, repeatable engine performance after replacing the kit.

Product condition and characteristics of used parts

The offered set belongs to the group of used electronic control modules, which in practice allows for combining original BMW quality with an attractive purchase price. This type of solution is particularly beneficial for repairs of older 1 and 3 Series models, where full replacement with new factory components is often economically unjustified.

Before installation, a standard diagnostic procedure and verification of communication with other modules in the vehicle are recommended. Professional installation at a specialized BMW service center or an automotive electronics workshop increases the chance of trouble-free operation after replacement.

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 engine controllers, comfort modules, or security control units, check out the available parts in the BMW electronic control modules and controllers category.

If you want to better understand how to effectively use used BMW electronic modules – including engine controllers or comfort modules – and how to ensure their proper maintenance in the 3 and 5 Series, read the article: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models.

Additional practical tips on choosing used components for this brand are also provided in the guide Used parts for BMW – is it worth it? Key benefits for brand fans, which discusses, among other things, the economic and operational aspects associated with installing original, yet used, modules.