Format a USB drive to FAT32. Copy the firmware files (usually update.zip and a .bin file) to the root directory .
Find a compatible update.zip specifically for your model (check XDA Forums or the manufacturer's site).
The process takes about 7-15 minutes . Do not turn off the car or ignition during this time. Method 2: Updating the Android Auto App (ZLink/TLink)
The 8227L is an entry-level processor found in numerous branded and generic Android head units, including Junsun , Podofo, and other "Chinese" car stereos.