BMW 5 Series F07 F10 F11 CAS4 Control Unit Key Reading Module 9301523

BMW 5 Series F07 F10 F11 CAS4 Control Unit Key Reading Module is a specialized module from the Electronic Control Units and Controllers group, responsible for handling the electronic key and authorizing ignition in selected BMW 5 Series models. A used OEM part helps maintain consistency with the vehicle's factory electrical architecture, ensuring stable operation of comfort and safety systems. This solution is for users who expect precise CAS4 system performance while keeping repair costs reasonable.

Specifications and technical data

• SKU: 9301523
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9301523
• Substitutable numbers: 61356809375, 6809375, 61359301523, 9301523, KZ
• Category: ECUs & Computer Modules

Function of the CAS4 Module in BMW 5 Series

The CAS4 module in BMW 5 Series F07, F10, and F11 is responsible for key reading, driver authorization, and engine start authorization. It works with the vehicle's electrical system, steering lock system, and other control units, forming a cohesive security system. A correctly selected and functional module is crucial for:

• proper key recognition in the vehicle,
• stable start/stop function operation,
• maintaining the integrity of the anti-theft system,
• seamless communication with other control units in the vehicle network.

Benefits of Using an Original BMW Module

An original CAS4 module from the Electronic Control Units and Controllers group ensures high compatibility with BMW's factory software and wiring harness. This allows you to:

• minimize the risk of communication errors between control units,
• maintain the factory logic of comfort and security systems,
• facilitate diagnostic work and programming using dedicated BMW service tools,
• preserve vehicle parameter consistency with service documentation.

A used OEM part offers a reasonable compromise between cost and quality, especially for advanced electronic systems where compatibility with the BMW platform is paramount.

Application and Selection for BMW 5 Series F07/F10/F11

The presented CAS4 module is designed for selected configurations of the BMW 5 Series F07, F10, and F11 generations. When selecting, pay attention to:

• compatibility with the specific body version and model year,
• the type of access and start system used,
• programming and adaptation requirements for the specific vehicle.

In practice, installing such a control unit typically requires professional adaptation and coding to be correctly paired with the keys and other modules in the vehicle. This restores the CAS4 system to full functionality, and the car retains the manufacturer-intended security features.

Condition and Performance Characteristics

The module is offered as a used part, meaning it comes from a previously operated BMW vehicle. These types of control units, when handled correctly and installed properly, can still provide stable and repeatable CAS4 system operation. Choosing a used module is particularly attractive when cost reduction is a priority while maintaining the original electronic architecture.

Expansion of the Control System in BMW

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

To better understand how original electronic modules influence the character and behavior of a premium car, it's worth reading an article describing the role of factory components in the Audi brand – you can find it here: Audi and Pure Emotion – How Used Parts Help Maintain the Brand's DNA.

If you are interested in the broader context of vehicle modification and want to learn a practical approach to using used components in upgrade projects, a helpful guide might be: How to Increase Engine Power: A Practical Guide to Engine Tuning with Used Parts.