Beschreibung
The Car Is Not Old. The Screen Is. A 2017 Audi A4 B9 is a good car with a bad interface. The chassis, the drivetrain and the interior materials all still hold up, and then you reach for a head unit that predates wireless CarPlay and cannot run a mapping app without a cable. Replacing the car to get a better screen is the most expensive way to solve a software problem. Replacing the screen is the cheapest.
This unit is a non-destructive retrofit for the B9 platform. It keeps the factory radio, the factory steering wheel controls and the factory Can-Bus behaviour, and adds a 1920 x 720 touchscreen over the top with wireless Apple CarPlay and wireless Android Auto. Navigation, music, calls and messaging run from your phone onto a display that is actually readable at a glance, and because the connection is wireless there is no cable to route across the console every journey. The screen is available at 10.25 inches and 12.3 inches, with storage and memory configurations from 4GB and 32GB up to 8GB and 128GB, which is the difference between a unit that runs one app at a time and one that does not need to choose.
Hardware is built around an eight-core MTK8581 processor with 4 x 50W audio output, Bluetooth, 4G and WiFi networking, a TF card slot for local media and support for reversing camera input. The interface is plug and play, which in practice means the original looms and connectors are reused rather than cut. Output languages cover the full European list including English, German, French, Italian, Spanish, Polish and Dutch. STWEI has been building head units for over a decade and supplies a one-year warranty on this model, which is CE and RoHS certified.
An old car with a new screen drives like a newer car. Nobody has ever said the reverse.
Key Features
- ✦ Wireless Apple CarPlay and wireless Android Auto with no cable to route every journey
- ✦ 10.25-inch or 12.3-inch touchscreen at 1920 x 720 resolution
- ✦ Storage configurations from 4GB RAM and 32GB ROM up to 8GB RAM and 128GB ROM
- ✦ Eight-core MTK8581 processor with 4 x 50W audio output
- ✦ Retains factory radio, steering wheel controls and Can-Bus behaviour
- ✦ Non-destructive plug-and-play installation using the original connectors
- ✦ 4G and WiFi networking, Bluetooth audio and a TF card slot for local media
- ✦ Multi-language interface covering the full European language list
Technical Specifications
- Compatible vehicles: Audi A4, A5 and S5 B9 platform, 2017 model year
- Display sizes: 10.25 inch and 12.3 inch
- Resolution: 1920 x 720
- Touchscreen: Yes, capacitive
- Operating platform: Android-based, MTK8581 eight-core processor
- Memory and storage: 4GB RAM with 32GB ROM, or 8GB RAM with 64GB or 128GB ROM
- Audio output: 4 x 50W
- Connectivity: Wireless Apple CarPlay, wireless Android Auto, Bluetooth, 4G, WiFi, Can-Bus
- Tuner: Original factory radio retained
- Expansion: 1 x TF / microSD slot, two USB interfaces, max external memory 256GB
- Camera support: HD reversing camera input
- Steering wheel controls: Supported through Can-Bus
- Media formats: MP3, MP4, WMA, JPEG
- Installation: Plug and play, non-destructive, original loom reused
- Voltage: 12V vehicle supply
- Certification and warranty: CE and RoHS certified, 1 year warranty
Where It Belongs
This upgrade belongs in any B9-platform Audi that is being kept rather than traded. The owner who has decided the car is worth another three years is the exact buyer, because the retrofit preserves everything that still works and replaces only the part that has aged badly. It also suits fleet and company cars where the factory radio must remain functional and the installation has to be reversible, since the original connectors are reused rather than modified. Owners who drive long distances benefit most from the wireless CarPlay connection and the larger 12.3-inch screen, while a shorter urban commute is well served by the 10.25-inch panel with the standard memory configuration. Because the screen is a touch display, the cabin gains controls the original rotary interface never offered.
Frequently Asked Questions
Q: Will this fit my specific Audi?
It is built for the A4, A5 and S5 on the B9 platform, which is the 2017 model year generation. The screen replaces or overlays the factory display and the installation is plug and play, so confirming your model year and platform is the one check worth making before ordering.
Q: Does it work with an iPhone and with Android?
Both. Wireless Apple CarPlay and wireless Android Auto are supported, so either phone connects without a cable. Bluetooth audio and 4G and WiFi networking are available independently of the phone projection.
Q: Do I lose the factory radio or steering wheel buttons?
No. The factory radio is retained as the tuner and the steering wheel controls continue to work through the Can-Bus connection. The installation reuses the original connectors, which is what non-destructive means here.
Q: Which screen size and memory configuration should I choose?
The 10.25-inch screen with 4GB RAM and 32GB storage suits a straightforward CarPlay and navigation user. The 12.3-inch screen with 8GB RAM and 128GB storage is the choice if you plan to run local media, multiple apps, or want headroom for future updates.
Q: Which Android version does it run?
The unit is built on an Android-based platform running the eight-core MTK8581 processor. Vendor documentation across this family of units lists different build versions, so if a specific version number is critical to you, confirm the build on the unit you receive before relying on it.
Q: What is included and how long is the warranty?
The head unit with its plug-and-play harness, the touchscreen display and the mounting hardware for the B9 dash. The unit carries a one-year warranty and is CE and RoHS certified for European sale.
The EastSupplier Promise
Every unit is inspected before it leaves the warehouse. If a specification on this page does not match what arrives, we cover the return shipping and replace it. English-language support answers within one business day, and replacement parts for this category are stocked so that a working unit stays working.









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