Many Audi vehicles equipped with MMI 3G Basic or MMI 3G High have factory Bluetooth for telephone calls but cannot play music wirelessly from a phone. This often causes confusion because the phone pairs successfully, yet Bluetooth does not appear as an audio source under the MEDIA menu.
In most MMI 3G Basic and MMI 3G High systems, Bluetooth music streaming cannot be enabled through coding alone. The factory Bluetooth connection supports hands-free calls, but it does not provide the A2DP profile required for wireless music playback.
Does Audi MMI 3G support Bluetooth music?
Bluetooth capabilities depend on the exact MMI generation installed in the vehicle:
- MMI 3G Basic or Low: normally supports Bluetooth telephone calls but not factory A2DP music streaming.
- MMI 3G High: normally supports Bluetooth telephone calls but not factory A2DP music streaming.
- MMI 3G Plus: may support factory Bluetooth audio, depending on the vehicle equipment, software and configuration.
Before buying an interface or attempting any modification, use our Audi MMI identification guide to check the system installed in your vehicle.
The software version displayed by the MMI can help identify the system:
- Versions beginning with BNav usually indicate MMI 3G Basic or Low.
- Versions beginning with HNav usually indicate MMI 3G High.
- Versions beginning with HN+ or HN+R usually indicate MMI 3G Plus.
Can Bluetooth music be enabled with VCDS or the green menu?
If the vehicle has MMI 3G Basic or MMI 3G High without factory A2DP support, changing settings with VCDS, OBDeleven or the hidden green menu will not add the missing Bluetooth audio hardware and software functions.
Coding can enable features already supported by the installed equipment, but it cannot turn a telephone-only Bluetooth system into a complete A2DP music receiver.
For these MMI versions, an additional interface is normally required.
Ways to play music through MMI 3G
There are several possible solutions, but they differ significantly in sound quality, integration and cost.
FM transmitter
An FM transmitter is inexpensive and easy to install, but sound quality is usually limited. It may also suffer from interference and does not integrate with the MMI controls.
Bluetooth and AUX interface
A dedicated Bluetooth interface connects to the MMI system and adds A2DP music streaming and an AUX input. It offers better sound quality than an FM transmitter and retains the original dashboard, MMI controls and factory appearance.
Our Bluetooth and AUX module for Audi MMI 3G is available in versions for MMI 3G Basic and MMI 3G High.
The module communicates with MMI as an additional media device. Depending on the selected version and installation, it can provide:
- Bluetooth A2DP music streaming
- AUX audio input
- Track control using the MMI panel or steering-wheel buttons
- Automatic connection with the previously paired phone
- Track information displayed on the MMI screen when supported
Apple CarPlay and Android Auto interface
Drivers who also want smartphone navigation, applications and voice control can choose a wireless Apple CarPlay and Android Auto interface for Audi MMI 3G.
This is a more extensive upgrade than a Bluetooth audio module. It adds a modern smartphone interface while retaining the original MMI screen and controls.
Retrofit to MMI 3G Plus
Replacing MMI 3G Basic or High with MMI 3G Plus is technically possible, but it requires compatible hardware, wiring, component protection removal, coding and configuration. It is generally much more expensive and complicated than installing a dedicated Bluetooth or CarPlay interface.
How does the MMI 3G Bluetooth module work?
The Bluetooth interface connects to the vehicle’s MOST fibre-optic infotainment network and receives a separate power supply. It identifies itself to the MMI as an additional media device, usually similar to a CD changer.
After installation, Bluetooth and AUX sources can be selected from the MMI media menu:
MEDIA → SOURCE → Bluetooth or AUX
The exact source name can differ depending on the module version.
The interface does not normally replace the factory hands-free Bluetooth connection. Your phone can remain paired with the original Audi system for calls while using the additional module for music.
Important CD changer limitation
MMI 3G can support only a limited number of devices configured as CD changers. The Bluetooth interface operates by presenting itself as one of these devices.
If the vehicle already has a physical CD changer, it may need to be disconnected for the Bluetooth module to work correctly. This depends on the existing equipment and the interface configuration.
The MOST fibre-optic network must remain a complete closed loop. An incorrectly connected optical cable can cause multiple MMI devices to disappear or prevent the infotainment system from starting correctly.
How to use Bluetooth music after installation
Once the interface has been fitted:
- Switch on the ignition and allow MMI to start.
- Enable Bluetooth on your phone.
- Search for the Bluetooth device associated with the interface.
- Select the module and enter its pairing code if requested.
- Open MEDIA → SOURCE in MMI.
- Select the Bluetooth audio source.
- Start music playback on the phone.
Some modules use the default pairing code 1234, but always check the documentation or label supplied with your particular device.
If supported by the interface, track information can be enabled from the module’s settings or by selecting the appropriate display option in MMI.
Bluetooth calls work, but music does not appear
This is normal when MMI 3G Basic or MMI 3G High has factory Bluetooth intended only for telephone calls.
Check the following:
- Confirm the exact MMI version installed in the vehicle.
- Look under MEDIA → SOURCE for Bluetooth audio.
- Do not assume that successful telephone pairing means the system supports A2DP.
- Check whether an aftermarket Bluetooth, AMI or multimedia interface is already fitted.
- Confirm that the phone is connected to the correct device for media audio.
If no Bluetooth audio source exists and the system is MMI 3G Basic or MMI 3G High, an additional hardware interface is normally required.
Is a Bluetooth module or CarPlay interface better?
Choose a Bluetooth and AUX module if you primarily want simple wireless music playback while retaining the original Audi interface.
Choose a CarPlay and Android Auto interface if you also want smartphone navigation, compatible applications, voice assistants and a more modern on-screen experience.
Both solutions retain the factory MMI system, but the CarPlay interface provides substantially more functionality.
