BMW G20 G30 Telematics Module Bluetooth Telephone Control Unit 8734745

The Bluetooth Telematics Module – the telephone control unit for the BMW 3 Series G20 and 5 Series G30 – is an original component of the connectivity system, responsible for stable Bluetooth communication and the vehicle's telephone functions. This component is disassembled, allowing you to combine BMW factory quality with a reasonable cost for repairing or upgrading the multimedia system.

Specifications and technical data

• SKU: 8734745
• Mark: BMW
• Condition: Used
• OEM Part Number: 8734745
• Substitutable numbers: 8734745, 84108734745, 9843930, 84109843930
• Category: Portable GPS Systems

Purpose and function in the vehicle

The offered BMW G20/G30 Bluetooth telematics module serves as the central control unit for telephony functions in the infotainment system. It is responsible for:

• hands-free kit with integration with the factory audio system,
• stable phone pairing via Bluetooth,
• call management via the multifunction steering wheel and the iDrive screen,
• data transfer between the phone and the vehicle as part of the connectivity function.

The module is designed for use in modern BMW 3 Series G20 and 5 Series G30 models, working with the drive unit code B58B30A, which ensures consistency with the electronic architecture of these generations.

Benefits of using the original BMW module

Choosing a used, factory-installed BMW telematics module ensures full compatibility with the vehicle's electrical system and software. In practice, this means:

• no need to modify the installation – connectors and wiring harnesses are matched to the BMW factory standard,
• proper cooperation with the iDrive system and other controllers in the vehicle,
• maintaining the original functionality of the buttons on the steering wheel and center panel,
• consistency with the vehicle equipment configuration (user profile, phone settings, phone book).

As an OEM part from disassembly, the module is a good alternative to new components, especially when repairing electronics failures or replacing a damaged controller after flooding or overvoltage.

Technical condition and origin

The module is offered as a used part, sourced from a low-mileage vehicle, which translates to limited wear and tear on the electronic components. These components are not subject to typical wear and tear like mechanical parts, so when properly installed, they can continue to function in the vehicle for a long time.

Original manufacturer markings and part number assignments to specific families make it easy to select the correct module for your BMW. If you have any doubts about compatibility, compare the controller data with your vehicle's configuration or consult an automotive electrician.

Application in repairs of the iDrive system and BMW electronics

The Bluetooth telematics module is often replaced when experiencing phone connectivity issues, pairing failures, or the system failing to respond to connection attempts. Combined with other controllers—such as comfort and multimedia modules—it forms an important element of the entire iDrive ecosystem.

If you're planning a comprehensive diagnostic or electronics repair in your BMW 3 or 5 Series, it's worth checking out the practical tips for working with used control units and infotainment systems in the article about long-term use of iDrive systems and electronic modules in the BMW 3 and 5 Series using disassembled parts . There, you'll find information on how to safely perform the replacement and what to look for when adapting modules.

Why choose a used OEM part?

When it comes to advanced electronic components, such as a BMW phone control unit, original aftermarket components often perform better than new replacements. They maintain factory operating parameters, are compatible with the manufacturer's software, and require no modifications to the installation.

If you're considering whether to choose a used or aftermarket part, this guide will help explain why a used OEM part is often a better choice than an aftermarket part . These practical tips will help you make a decision when planning an electronics repair for your BMW.

Summary

The Bluetooth Telematics Module – Phone Control Unit for the BMW G20 and G30 is a functional solution for drivers who want to restore full connectivity functionality or replace a damaged control unit with an original component. This used part, taken from a modern model with the B58B30A unit, allows for factory integration with the iDrive system, audio system, and other vehicle controls, ensuring convenient and safe phone use while driving.