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 CAS2 Key is an original module from the Electronic control modules and controllers group, designed to support the vehicle access and starting system in selected BMW 1 and 3 series models with the N46 engine. This used BMW CAS controller ensures factory-standard electronic system logic, facilitating professional repair or replacement of a faulty module in E87 and E90 vehicles.

Specifications and technical data

• SKU: 7552176-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7552176
• Substitutable numbers: 12147552177 12147552176 12147550535, 12147550534 12147545043 12147545042, 12147531846, 7531846, 12147557291, 7557291, 7552177 7552176 7550535, 7550534 7545043 7545042, 0261208582, 0 261 208 582
• Category: ECUs & Computer Modules

Purpose and function of the BMW CAS controller

The CAS computer in BMW E87 118i and E90 318i models with the N46 unit is responsible for key authorization, managing the engine start procedure, and communicating with other comfort and security modules. Using an original controller from the same family allows for maintaining the consistency of the vehicle's electronic architecture, which is essential for diagnostics, coding, and adaptation. The module belongs to the Electronic control modules and controllers group, ensuring it is designed for stable communication within the vehicle's bus system and resistance to typical operational loads in the cabin or cowl area.

Benefits of using an original CAS module

Using an original CAS computer in BMW 1 and 3 series with the N46 engine provides a number of practical service benefits:

• factory compatibility with the vehicle's electrical installation and CAN network,
• possibility of correct coding and adaptation using standard BMW diagnostic tools,
• preservation of original security logic and comfort functions,
• easier identification in service systems due to compliance with OEM part numbers and interchangeable numbers. For workshops specializing in the BMW brand, such a controller is a valuable component for electronic system repairs, especially in vehicles where the CAS module has been damaged due to power surges, water ingress, or failed programming attempts.

Condition, origin, and application in service practice

The offered BMW CAS computer comes from dismantling and is a Used component, which allows for economical vehicle repair while maintaining original build quality. Such modules are frequently used in professional service centers and by advanced enthusiasts who perform controller replacements with subsequent matching to a specific car. Before installation, it is recommended to verify compatibility with your vehicle based on the OEM part number and available interchangeable numbers, followed by performing the appropriate coding and synchronization procedures with other controllers, in accordance with BMW service documentation.

Integration with other BMW electronic modules

The CAS computer works with many key modules in the car, such as the engine control unit, comfort modules, or multimedia systems. In the case of extensive BMW electronics repairs – involving, for example, FRM modules, engine controllers, or iDrive systems – it is worth using expert knowledge and proven parts from dismantling. An extended discussion of this topic can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using parts from dismantling?, which describes best practices when working with used BMW electronic modules.

Expanding repairs within BMW control modules

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other components from the same group, such as engine controllers, comfort modules, or security management units, check the available parts in the BMW electronic control modules and controllers category.