BMW E87 E90 118i 318i N46 129HP Engine Control Unit ECU Kit DME 7552176 CAS2 Key

BMW E87 E90 118i 318i N46 129HP Engine Control Unit ECU Kit DME 7552176 CAS2 Key is a complete engine control kit designed for select BMW 1 Series and 3 Series models with the 129 HP N46 engine. The kit includes the DME engine control unit, the CAS2 module, and a matched key, facilitating the restoration of proper electronic system operation after an engine failure or replacement. This solution ensures seamless and technically correct integration of the powertrain electronics with the immobilizer system.

Specifications and technical data

• SKU: 7552176-11
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7552176
• Substitutable numbers: 7552176, 12147552176, 7557291, 12147557291, 7552177, 12147552177, 7550535, 12147550535, 7550534, 12147550534, 7545043, 12147545043, 7545042, 12147545042, 7531846, 12147531846, 0261208582, 0 261 208 582, 61356943771, 6943771
• Category: ECUs & Computer Modules

Application and Function of the ECU DME CAS2 Kit

The presented engine control unit kit is intended for BMW E87 and E90 vehicles in the 118i and 318i versions with the 129 HP N46 engine. The combination of the DME control unit with the CAS2 module and key ensures consistency of immobilizer data, which is crucial when replacing powertrain electronics. This allows you to avoid time-consuming zero-point programming procedures and focus on correct installation and adaptation in the vehicle.

Benefits of Using an Original BMW Module

This kit belongs to the group of Electronic Control Modules and Controllers, meaning it is specifically designed to work with BMW's factory electrical architecture. The original DME control unit communicates with the CAN bus, security system, and other comfort and safety modules, minimizing the risk of software conflicts typical of unreliable aftermarket replacements.

In practice, this means:

• maintaining the factory operating parameters of the 129 HP N46 engine,
• correct communication with the CAS2 module and instrument cluster,
• stable operation of related systems (e.g., OBD diagnostics, dashboard warning lights),
• easier vehicle adaptation compared to mixing different control unit versions.

Technical Characteristics and Compatibility

As an element from the Electronic Control Modules and Controllers group, the ECU DME CAS2 kit with key is designed to operate in the demanding environment of the engine bay and vehicle interior. The DME control unit's construction is adapted for cooperation with the N46 gasoline engine, taking into account specific injection maps, ignition timing, and engine protection strategies.

The presence of the matched CAS2 module and key significantly simplifies the installation process in cases of:

• replacement of a damaged engine control unit after an electrical failure or flooding,
• swapping a complete powertrain between vehicles of the same model family,
• resolving immobilizer issues and lack of starting authorization.

Product Condition and Installation Aspects

The offered kit is a used part, sourced from dismantling, which allows for a favorable cost-to-functionality ratio while maintaining compliance with factory BMW standards. Before installation, it is recommended to perform vehicle diagnostics and verify equipment version compatibility to ensure proper cooperation with other modules in the car.

Professional installation includes:

• correct connection of the DME control unit in the engine bay,
• replacement of the CAS2 module in the vehicle's cabin,
• use of the included key and potential vehicle adaptation using appropriate diagnostic software.

Technical Support and Further Information

If you want to better understand how to utilize a used BMW engine control unit and other electronic modules in the 3 and 5 Series, it is worth reading the guide on our blog: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models. There you will find practical tips on diagnostics, selection, and installation of dismantled parts.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as DME control units, CAS modules, or other body control modules, check the available parts in the BMW Electronic Control Modules and Controllers category.