The Audi S4 B8 Bluetooth ECU Control Module is an original part from the Electronic Control Modules and Controllers category, designed for integrating the Bluetooth system with the vehicle's factory electronics. The used controller ensures the preservation of the factory ECU network architecture, which facilitates diagnostics, configuration, and subsequent service. The blue finish of the housing allows for quick identification of the module in the wiring harness.
Specifications and technical data
- SKU: 4E0862336MX
- Mark: Audi
- Condition: Used
- OEM Part Number: 4E0862336MX
- Substitutable numbers: 4E0862336MX, 4E0 862 336 MX, 4E0910336MX, 4E0 910 336 MX
- Color: Blue
- Category: ECUs & Computer Modules
Module Purpose and Function
The presented Bluetooth ECU controller was designed by Audi as part of the factory connectivity system in S4 B8 models. Its task is to handle Bluetooth wireless communication in close cooperation with the engine control unit, instrument cluster, and multimedia system, while maintaining manufacturer standards for transmission security and operational stability.
The module operates on the vehicle's bus as a dedicated controller, allowing for:
- integration of Bluetooth functions with existing ECU software,
- maintenance of vehicle configuration consistency in diagnostic systems,
- easier coding and adaptation compared to universal solutions.
Construction, Color, and Wiring Integration
The controller belongs to the group of Electronic Control Modules and Controllers, meaning it works with other ECUs in the vehicle through factory connectors and harnesses. The blue housing facilitates the identification of the correct module during installation and service work, especially in densely packed areas under the dashboard or in the center console.
The OEM solution ensures:
- consistency with the original Audi electrical architecture,
- proper module assignment in diagnostic systems,
- preservation of factory operating parameters for the Bluetooth system.
Condition, Origin, and Benefits of Choosing a Used Controller
The offered module is a used part, which significantly reduces the cost of repair or equipment upgrade compared to purchasing a new unit. At the same time, you retain the advantages of an original Audi part, including structural compatibility, correct markings, and the possibility of matching by OEM number and interchangeable numbers available in the technical specifications.
Choosing a used Bluetooth ECU controller is particularly beneficial when:
- you are repairing the factory connectivity system after a failure or water damage,
- you are restoring full functionality after replacing other electronic modules,
- you want to maintain the original equipment configuration without using universal replacements.
To better understand how to safely select and install used controllers, check out the Global Parts guide: used car electronics – second-hand ECU modules and sensors.
Selection by Numbers and Compatibility
The module has an assigned OEM part number and related interchangeable numbers, which can be found in the technical specifications section. These form the basis for selecting the correct controller for a specific Audi S4 B8 version and other models using the same electronic platform. When matching, it is recommended to verify compatibility by OEM number, reference numbers, and vehicle equipment configuration.
In practice, this means that before purchasing, it is advisable to:
- compare the module's markings with the part installed in the car,
- check for compatibility in the parts catalog or service documentation,
- consult with a mechanic or car electrician experienced with Audi electronics for selection.
Audi Electronic Control Modules and Controllers – Offer
If you are also looking for other Audi Electronic Control Modules and Controllers to expand or repair the wiring in your car, check out our dedicated category: Audi Electronic Control Modules and Controllers. This will allow you to easily combine compatible parts and build a cohesive onboard electronics system.
