Use this article if…
- Your MK4 Bluetooth / CarPlay / Android Auto won’t pair or start (broad phone link failures, start here).
- First-time CarPlay never finishes initial setup → CarPlay first connect.
- Wireless CarPlay drops mid-drive → CarPlay disconnects. Android only → Android Auto won’t connect.
- iPhone Wi-Fi with Starlink or a camp router → CarPlay vs Wi-Fi. Maps need data → Internet on MK4.
Quick answer
Delete the MK4 from your phone's Bluetooth list and from the CarPlay/Android Auto car list. Reboot the phone and the headunit, then pair again from the MK4 wizard with a known-good data cable.
Problem
- Your phone won’t pair, or CarPlay / Android Auto / Bluetooth won’t start or stay connected.
Symptoms
- Your Bluetooth never finishes pairing, or it drops straight away.
- CarPlay / AA sits on connecting.
- You can take calls, but apps won’t project.
- USB works, wireless doesn’t, or the other way round.
Cause
- The pairing is stale after a reinstall or a big phone update.
- Your phone permissions are blocked.
- The cable is charge-only, or the USB port is worn.
- Battery saver is shutting down BT or Wi-Fi.
- You've got too many BT devices on in the cab.
- Your headunit firmware may need a PVS update for your phone generation.
Fix Step-by-step
- Delete the MK4 from your phone BT list and from the CarPlay / AA car lists, reboot the phone and the headunit, then pair again from the MK4 menus.
- Approve contacts and notifications when your phone prompts you.
- Plug a known data USB cable straight into the MK4, no cheap extension.
- Android: turn off battery optimisation for AA and Bluetooth.
- iPhone: remove the car under Settings → General → CarPlay, then rediscover.
- Turn off extra BT gadgets for one test drive.
Notes
- First-time CarPlay: CarPlay first connect
- Wireless: Wireless CP/AA dropping, CarPlay disconnects
- AA only: Android Auto not connecting
- BT silent: Bluetooth pairs, no audio
- Data: No internet on MK4
- Firmware pathway: MK4 firmware & updates (PVS)
Firmware & updates (quick)
- Check build: Settings → System → About device / About tablet (labels vary), then screenshot the build number for your email.
- When it’s relevant: After PVS gives you a package, or if you still can’t project once you’ve swapped the cable, forgotten and paired again, and sorted stable power. Not before. Full steps: MK4 firmware & updates.
- Safe rules: PVS-supplied files only, strong battery, don’t unplug USB while it’s running.
- Stop, contact PVS: Unofficial flash, boot loop after an update, burning smell or a brick.