Audi MMI 3G was a very capable infotainment platform when it was introduced, but it was designed long before Apple CarPlay and Android Auto became standard features in modern vehicles.
That does not mean you need to replace the complete factory MMI system.
For many Audi models equipped with MMI 3G Basic, MMI 3G High or MMI 3G Plus, Apple CarPlay and Android Auto can be added using a dedicated retrofit interface installed between the original MMI system and the factory display.
The original Audi interface remains available, while the additional module provides modern smartphone integration.
This type of upgrade can add:
- Wireless Apple CarPlay
- Wired or wireless Android Auto, depending on the interface
- Google Maps
- Waze
- Apple Maps
- Spotify
- YouTube Music
- Podcasts
- Siri
- Google Assistant
- hands-free calling
- smartphone-based navigation
without replacing the complete dashboard or factory infotainment unit.
Quick Answer
If your Audi uses:
BNav_— MMI 3G BasicHNav_— MMI 3G HighHN+_— MMI 3G PlusHN+R_— MMI 3G Plus
you may be able to add Apple CarPlay and Android Auto with a dedicated retrofit interface.
For these MMI 3G systems, CarPlay is generally not enabled by installing newer Audi firmware.
Instead, an additional hardware interface is used.
Product:
Which Audi MMI 3G Systems Can Be Upgraded?
The first step is identifying the exact MMI system.
Audi used several different infotainment generations that can look similar from inside the car.
Do not choose a CarPlay interface only by:
- Audi model
- production year
- screen size
- shape of the control panel
Check the complete MMI software version.
MMI 3G Basic
Typical software prefix:
BNav_
Example:
BNav_EU_P0029_D1
MMI 3G Basic is a separate platform from MMI 3G High and Plus.
A compatible retrofit interface can add smartphone integration while keeping the original system available.
MMI 3G High
Typical software prefix:
HNav_
Examples:
HNav_EU_...
HNav_US_...
MMI 3G High is widely found in older Audi A4, A5, A6, A8, Q5, Q7 and related models.
A compatible CarPlay interface works alongside the factory MMI rather than replacing it with newer MIB firmware.
MMI 3G Plus
Typical software prefixes:
HN+_
or:
HN+R_
Examples:
HN+_EU_AU3G_...
HN+_US_AU3G_...
HN+R_EU_AU_...
HN+R_US_AU_...
HN+ and HN+R are different firmware branches, even though both belong to the MMI 3G Plus generation.
For CarPlay retrofit purposes, the exact system and vehicle configuration still need to be verified before ordering.
How to Check Which MMI You Have
Open the version information screen in your Audi and write down the complete software version.
If you are unsure how to find it, use our identification guide:
You can also use:
The software prefix is usually much more useful than simply knowing that the car is, for example, a 2014 Audi A6.
MMI 3G CarPlay Compatibility Table
| MMI system | Typical software prefix | CarPlay method |
|---|---|---|
| MMI 3G Basic | BNav_ | Hardware retrofit interface |
| MMI 3G High | HNav_ | Hardware retrofit interface |
| MMI 3G Plus | HN+_ | Hardware retrofit interface |
| MMI 3G Plus | HN+R_ | Hardware retrofit interface |
| MIB2 High | MHI2_ / MHI2Q_ | Native software activation may be possible on compatible units |
| MIB3 | MHI3_ | Different platform and procedure |
This distinction is extremely important.
MMI 3G and MIB2 should not be treated as the same system.
Can Apple CarPlay Be Activated by Software on MMI 3G?
Not in the same way as on compatible MIB2 systems.
MMI 3G does not contain the same native Apple CarPlay architecture used by later MIB platforms.
Installing newer:
- firmware
- navigation maps
- activation scripts
- Green Menu settings
does not transform MMI 3G into a native MIB2 CarPlay system.
For MMI 3G, the practical solution is normally a dedicated hardware interface.
What Does the CarPlay Retrofit Module Do?
The retrofit module adds a second smartphone-oriented interface while preserving the original Audi MMI.
The module is installed into the existing infotainment setup and switches the factory display between:
- original Audi MMI
- Apple CarPlay
- Android Auto
The exact switching method depends on the vehicle and module configuration.
In compatible installations, the retrofit is designed to continue using existing controls rather than requiring a separate aftermarket screen.
Do I Lose the Original Audi MMI?
No.
A properly installed retrofit interface works alongside the original MMI.
You can still return to factory functions such as:
- Audi navigation
- radio
- vehicle settings
- media
- telephone
- MMI settings
The retrofit does not normally remove the factory system.
It adds another interface on top of the existing setup.
Wireless Apple CarPlay on Audi MMI 3G
Wireless CarPlay allows a compatible iPhone to connect without plugging in a cable for every journey.
Once paired, the phone can reconnect to the retrofit interface when the system starts.
You can then use compatible CarPlay applications such as:
- Apple Maps
- Google Maps
- Waze
- Spotify
- Apple Music
- Podcasts
- Messages
- Siri
The exact app availability is controlled by Apple CarPlay and the phone, not by the Audi MMI itself.
Android Auto on Audi MMI 3G
A compatible retrofit interface can also provide Android Auto.
Depending on the module and smartphone, connection may be wired or wireless.
Android Auto can provide access to applications such as:
- Google Maps
- Waze
- Spotify
- YouTube Music
- messaging apps
- Google Assistant
Again, the factory MMI 3G system itself is not being converted into Android Auto software.
The retrofit interface provides the additional functionality.
MMI 3G High CarPlay Retrofit
If your software version starts with:
HNav_
you normally have MMI 3G High.
This is one of the most common platforms for Audi CarPlay retrofit installations.
Instead of replacing:
- the MMI head unit
- display
- control panel
- amplifier
- wiring architecture
a dedicated module can be integrated with the existing system.
This makes it considerably simpler than a complete MIB2 hardware conversion.
MMI 3G Plus CarPlay Retrofit
If your software begins with:
HN+_
or:
HN+R_
you have an MMI 3G Plus family system.
MMI 3G Plus has newer graphics and functionality than MMI 3G High, but it still predates native Audi Smartphone Interface.
A hardware CarPlay / Android Auto module remains the normal upgrade route.
MMI 3G Basic CarPlay Retrofit
MMI 3G Basic systems use the:
BNav_
software family.
They are technically different from HNav and HN+ systems, so interface compatibility must be checked carefully.
Do not assume that every module advertised as “MMI 3G” supports every BNav configuration.
Verify compatibility before ordering.
MMI 3G CarPlay vs MIB2 CarPlay Activation
This is one of the most important differences on the entire site.
MMI 3G
Examples:
BNav_
HNav_
HN+_
HN+R_
Typical CarPlay solution:
additional hardware interface
MIB2
Examples:
MHI2_
MHI2Q_
Some compatible MIB2 units already contain the required hardware for Audi Smartphone Interface.
In those cases, Apple CarPlay and Android Auto may be enabled through a software-based activation procedure.
That is a completely different process.
For MIB2 CarPlay activation, see:
Do not purchase an MMI 3G retrofit module simply because the car does not currently show CarPlay.
First identify the infotainment system.
Can MMI 3G Be Upgraded to MIB2?
Yes, but not with firmware.
A genuine MMI 3G → MIB2 conversion requires replacing hardware.
Depending on the vehicle, this can involve:
- main infotainment unit
- display
- controls
- wiring
- USB hardware
- coding
- Component Protection
- additional vehicle-specific adaptation
This is significantly more involved than installing a CarPlay retrofit interface.
If your main objective is simply:
- Apple CarPlay
- Android Auto
- Google Maps
- Spotify
- modern smartphone integration
a dedicated interface is often the much simpler option.
Hardware Retrofit vs Full MIB2 Conversion
| Feature | CarPlay retrofit interface | Full MIB2 retrofit |
|---|---|---|
| Keeps original MMI | Yes | No / partially |
| Adds CarPlay | Yes | Yes |
| Adds Android Auto | Yes | Yes |
| Requires complete MMI replacement | No | Yes |
| Requires major coding | Usually less | Usually more |
| Component Protection work | Normally not for interface itself | Often relevant |
| Cost | Lower | Higher |
| Installation complexity | Moderate | High |
| Factory MIB2 functions | No | Yes |
If the goal is smartphone integration rather than rebuilding the complete infotainment architecture, the interface route is usually more practical.
Does the Retrofit Change Audi Firmware?
No.
A CarPlay interface and an MMI firmware update are two separate upgrades.
For example:
HNav_EU_K0257_6_D1
is an MMI 3G High firmware version.
Installing a CarPlay module does not change the system to another HNav firmware version.
Likewise, installing firmware does not automatically add CarPlay.
Does a CarPlay Retrofit Update the Navigation Maps?
No.
Maps remain separate.
For example, a European MMI 3G High or Plus system may use:
6.36.0 / 8R0051884KL
North America can use:
6.24.0 / 8R0060884JE
ROW systems can use:
5.13.4
Installing a CarPlay interface does not update those factory navigation databases.
Instead, you gain access to phone-based navigation applications such as Google Maps, Apple Maps or Waze.
Do You Still Need Factory Map Updates After Installing CarPlay?
That depends on how you use the car.
If you primarily use:
- Google Maps
- Waze
- Apple Maps
through CarPlay or Android Auto, factory navigation may become less important.
However, the original Audi navigation remains available.
Some drivers prefer to keep both systems current.
For our general Audi map update guide:
Can I Use the Original Audi Controls?
A compatible retrofit interface is designed to integrate with the existing MMI environment.
Depending on the vehicle and module configuration, control can typically be handled through the existing MMI controller and supported steering wheel functions.
The exact controls can vary between vehicles and installations.
Check the installation instructions supplied with the interface.
Does the Original Screen Stay in the Car?
Yes.
The retrofit module is designed to use the factory display.
You do not normally need to replace the Audi screen with a tablet-style aftermarket display.
This helps preserve the original appearance of the dashboard.
What About Sound?
Audio routing depends on the exact vehicle and interface installation.
Different Audi configurations can use different audio architectures.
Follow the product-specific installation instructions rather than assuming one universal audio connection method for every MMI 3G vehicle.
If CarPlay displays correctly but there is no sound, first check the interface’s audio configuration and installation.
Do I Need AUX?
This depends on the particular retrofit module and Audi configuration.
Some installations may use an auxiliary audio path or another audio integration method.
Do not enable random MMI settings simply because another owner’s car required AUX.
Follow the instructions for the exact vehicle and interface.
Will the Retrofit Work With BOSE or Bang & Olufsen?
Audio system compatibility needs to be checked as part of the complete vehicle configuration.
BOSE or Bang & Olufsen does not automatically mean that a CarPlay retrofit is impossible, but the audio routing and installation may differ.
Verify the module compatibility before installation.
Does the Retrofit Affect the Factory Reverse Camera?
A compatible interface is intended to coexist with factory vehicle functions.
However, camera configuration varies significantly between vehicles.
If the car has:
- factory rear-view camera
- aftermarket camera
- parking sensors
- 360° camera
verify the exact configuration before installation.
Do not assume every interface uses the same camera wiring.
CarPlay Retrofit Product
Our wireless Apple CarPlay / Android Auto interface for compatible Audi systems is available here:
Before ordering, confirm your MMI type.
If you are not sure:
Installation Guide
We also have a separate installation manual:
The installation guide should remain separate from this article.
This page explains:
compatibility, upgrade options and differences between MMI generations
while the tutorial explains:
how to install the interface physically.
Typical Installation Process
At a high level, installation usually involves:
- Identifying the exact Audi MMI system.
- Disconnecting the appropriate factory infotainment connections.
- Installing the retrofit harness.
- Connecting the interface module.
- Connecting the required video and audio paths.
- Configuring the interface for the vehicle.
- Reassembling the dashboard.
- Pairing the smartphone.
- Testing factory MMI operation.
- Testing CarPlay and Android Auto.
The exact connector layout depends on the Audi model and MMI configuration.
Use the dedicated installation manual rather than treating this list as a wiring guide.
Before Installing the Interface
Before starting:
- identify the MMI version
- disconnect power where required by the installation instructions
- protect dashboard trim
- avoid pulling connectors by their wires
- photograph factory connector positions
- verify all functions before fully reassembling the dashboard
If you are not comfortable removing trim or infotainment components, professional installation may be preferable.
Apple CarPlay Is Not the Same as Screen Mirroring
CarPlay is an interface specifically designed for compatible iPhone applications.
It does not simply duplicate everything shown on the phone screen.
The apps available in CarPlay are controlled by Apple.
The same principle applies to Android Auto.
Can I Watch YouTube Through Apple CarPlay?
Standard Apple CarPlay does not provide unrestricted mirroring of every iPhone application.
Do not assume that installing a CarPlay interface automatically enables video playback from every smartphone app.
Any additional mirroring or multimedia functionality depends on the specific interface and smartphone.
Does Wireless CarPlay Require Wi-Fi and Bluetooth?
Wireless smartphone integration typically uses a combination of wireless connections between the phone and interface.
The pairing procedure depends on the module.
Follow the supplied setup instructions after installation.
Is Wireless CarPlay Slower Than Wired?
Connection performance depends on:
- smartphone
- interface hardware
- wireless environment
- software version
- vehicle installation
For normal navigation and music use, a properly configured wireless interface should provide practical everyday operation.
A wired connection may still be useful when charging or troubleshooting.
What Cars Can Use an MMI 3G CarPlay Interface?
MMI 3G systems were installed in many Audi models, including various generations of:
- Audi A4
- Audi A5
- Audi A6
- Audi A7
- Audi A8
- Audi Q3
- Audi Q5
- Audi Q7
However, this list should not be used as a compatibility guarantee.
A model such as the Audi A6 can exist with several completely different infotainment systems.
Always check the MMI software version.
Audi A4 / A5 MMI 3G CarPlay
Many Audi A4 B8 and Audi A5 8T vehicles use MMI 3G systems.
Depending on specification, they may have:
- MMI 3G Basic
- MMI 3G High
- MMI 3G Plus
Do not order by chassis generation alone.
Check the software train.
Audi A6 / A7 MMI 3G CarPlay
Audi A6 C7 and A7 4G vehicles commonly use MMI 3G Plus in earlier configurations.
Typical software can begin with:
HN+_
or:
HN+R_
Later cars may use MIB platforms, so identification remains essential.
Audi Q5 / Q7 MMI 3G CarPlay
Audi Q5 and Q7 vehicles also span multiple infotainment generations.
A Q5, for example, may have MMI 3G or a later system depending on generation and production date.
Again:
software version first, model year second.
How to Avoid Buying the Wrong CarPlay Upgrade
Before ordering, send or check:
- Audi model
- production year
- current MMI software version
- photo of Version Information if necessary
The most useful information is normally the complete software train.
Examples:
BNav_EU_...
HNav_EU_...
HNav_US_...
HN+_EU_...
HN+_US_...
HN+R_EU_...
HN+R_US_...
Common Mistake: Confusing MMI 3G With MIB2
If your software begins with:
MHI2_
or:
MHI2Q_
you do not have MMI 3G.
You have a MIB2-family system.
On compatible MIB2 units, native Apple CarPlay / Android Auto activation may be possible without installing an external interface.
For MIB2:
Common Mistake: Trying to Enable CarPlay in the Green Menu
The Hidden Green Menu is useful for many MMI configuration functions.
However, enabling a menu item does not add hardware capabilities that the system does not have.
MMI 3G does not gain native CarPlay simply because a hidden option is changed.
For Green Menu information:
Common Mistake: Updating Firmware to Get CarPlay
A newer HNav or HN+ firmware can fix bugs or improve MMI software behavior, but it does not turn MMI 3G into a native CarPlay system.
Firmware and CarPlay retrofit are separate upgrades.
For firmware information:
Common Mistake: Assuming Every “MMI” Is the Same
Audi used the MMI name across many generations.
MMI 2G, MMI 3G, RMC, MIB1, MIB2 and MIB3 are not simply different software versions of one computer.
They are different platforms.
That is why correct identification is always the first step.
Troubleshooting After Installation
CarPlay interface does not appear
Check:
- interface power
- harness connections
- video connections
- configuration settings
- correct vehicle/MMI compatibility
CarPlay appears but there is no audio
Check the audio routing required by the interface and vehicle configuration.
Factory MMI works but CarPlay does not
Check module power, smartphone pairing and interface configuration.
Phone will not connect wirelessly
Remove the old pairing, restart the phone and interface, then repeat the pairing procedure.
Factory controls do not operate CarPlay correctly
Verify the interface configuration for the correct Audi / MMI platform.
Reverse camera does not switch correctly
Check the camera configuration of the interface and whether the vehicle uses a factory or aftermarket camera.
Frequently Asked Questions
Can Audi MMI 3G have Apple CarPlay?
Yes. Compatible MMI 3G systems can use a dedicated CarPlay retrofit interface.
Can MMI 3G have wireless CarPlay?
Yes, with a compatible wireless retrofit interface.
Can MMI 3G have Android Auto?
Yes, with a compatible retrofit module.
Can MMI 3G CarPlay be activated by software only?
Generally no. MMI 3G normally requires additional hardware for CarPlay integration.
Does MMI 3G already contain Apple CarPlay hardware?
It was designed before native Audi Smartphone Interface became available on later MIB platforms.
Does a firmware update add CarPlay to MMI 3G?
No.
Does a map update add CarPlay?
No.
Can I install MIB2 firmware on MMI 3G?
No.
Can MMI 3G be converted to MIB2 with firmware?
No. A real MIB2 conversion requires hardware replacement.
Is a CarPlay module easier than a full MIB2 retrofit?
In most cases, yes, because it keeps the original MMI architecture and adds smartphone integration through an interface.
Does the original Audi MMI still work?
Yes. A properly installed retrofit preserves access to the original MMI.
Can I still use the factory navigation?
Yes.
Can I use Google Maps?
Yes, through compatible Apple CarPlay or Android Auto.
Can I use Waze?
Yes, through supported smartphone integration.
Does the original Audi screen stay installed?
Yes.
Can I use the original MMI controller?
Compatible interfaces are designed to integrate with the existing controls, although exact operation varies by vehicle.
Does it work with MMI 3G Basic?
Compatible BNav systems can be supported, but verify the exact interface before ordering.
Does it work with MMI 3G High?
Yes, on compatible HNav systems.
Does it work with MMI 3G Plus?
Yes, on compatible HN+ and HN+R systems.
What does BNav mean?
BNav normally identifies Audi MMI 3G Basic.
What does HNav mean?
HNav normally identifies Audi MMI 3G High.
What does HN+ mean?
HN+ identifies one MMI 3G Plus software family.
What does HN+R mean?
HN+R identifies another MMI 3G Plus software family.
Is HN+ the same as HN+R?
No. They are separate firmware branches.
Is MHI2 MMI 3G?
No. MHI2 belongs to the MIB2 generation.
Can MIB2 get CarPlay without a hardware module?
On compatible MIB2 systems, native software activation may be possible.
How do I check which MMI I have?
Use:
or:
Where can I buy the MMI 3G CarPlay retrofit?
Is there an installation guide?
Yes:
Final Recommendation
If your Audi still uses MMI 3G but you want modern smartphone integration, you do not necessarily need to replace the entire infotainment system.
For compatible:
BNav_
HNav_
HN+_
and:
HN+R_
systems, a dedicated Apple CarPlay / Android Auto retrofit interface can add modern navigation, music and smartphone functions while keeping the original Audi MMI available.
The most important step is identifying the exact MMI system before purchasing the interface.
Check your system:
CarPlay / Android Auto retrofit:
