BMW F01 F07 F10 F11 F12 F25 CAS4 Module Control Unit Key Reading 6809374

BMW F01 F07 F10 F11 F12 F25 CAS4 Module Control Unit Key Reading 6809374 is an advanced component from the Electronic control modules and controllers group, responsible for handling key authorization and vehicle ignition in selected BMW F-series models. The offered item is an original BMW component that allows for professional repair of the comfort and ignition system while maintaining the factory electronics architecture. As a result, it provides a solid foundation for restoring full functionality to the CAS4 system in the vehicle.

Specifications and technical data

• SKU: 6809374
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6809374
• Substitutable numbers: 6809374, 61356809374, 9359013, 61359359013, 9339274, 61359339274, 9367376, 61359367376, 9289631, 61359289631, 9318367, 61359318367, 9347913, 61359347913, 9291917, 61359291917, 9299335, 61359299335, 9293393, 61359293393, 9301522, 61359301522
• Category: ECUs & Computer Modules

Purpose and function of the CAS4 module

The CAS4 module plays a key role in the vehicle's access and ignition system, integrating the key reader operation with other controllers in the vehicle network. In BMW F01, F07, F10, F11, F12, and F25 models, it is responsible for, among other things:

• key authorization and communication with the transponder,
• cooperation with the Start/Stop button and ignition lock,
• coordination of signals with other controllers in the vehicle bus,
• integration with comfort and security systems.

By maintaining the original BMW architecture, the use of this module allows for consistent operation of all related electronic systems.

Benefits of using an original BMW module

Choosing an original CAS4 module from the Electronic control modules and controllers group ensures high compatibility with the vehicle's factory installation. In practice, this means:

• a secure fit for electrical wiring harnesses and connectors,
• the possibility of correct coding and adaptation using BMW service software,
• preservation of the safety functions intended by the manufacturer,
• stable cooperation with other controllers in the CAN/FlexRay network.

For workshops specializing in the BMW brand, this is a solution that facilitates diagnostics, programming, and subsequent vehicle service.

Professional selection by OEM and interchangeable numbers

This CAS4 module has a dedicated OEM part number and a set of interchangeable numbers, which allows for precise selection based on the specific equipment variant and vehicle year. When selecting, it is recommended to verify:

• compatibility by the controller's OEM number,
• compatibility with the list of reference numbers,
• fitment for the specific generation and body version of the BMW F-series.

To deepen your knowledge on the safe use of second-hand controllers and sensors, how to select them by VIN/OEM, and installation principles, it is worth using our guide: Used automotive electronics – how to consciously choose second-hand ECU modules and sensors.

Operational characteristics and installation

The offered module belongs to the group of used OEM components, which in practice means maintaining the original design and operating parameters while optimizing repair costs. In service applications and professional retrofits, this allows for:

• restoring the factory functionality of the CAS4 system,
• reducing costs compared to purchasing a new controller,
• maintaining consistency with the existing vehicle electrical installation.

Before installation, a standard diagnostic procedure is recommended, as well as preparation for coding and potential synchronization with other controllers in accordance with BMW procedures.

Expansion of the control system in BMW

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

For a comparison of the cost-effectiveness of purchasing new versus used components and a better understanding of the quality differences between them, the following guide material will also be helpful: New or used electronics – a comparison of costs and quality of car parts.