Use this article if…
- You want PVS-approved steps for checking your MK4 software version and applying USB updates safely, not just the full first-time wizard.
- Brand-new unit out of the box → start with First time on the MK4 before you flash anything.
Quick answer
Check your build under Settings → About. Only flash USB packages PVS gives you for your MK4, keep the engine running and leave the stick in until the unit reboots itself, then key-cycle. Never flash random Android images and never pull the USB mid-update.
Problem
- You want to know your MK4's current build, whether an update is right for you, and how to apply PVS-supplied firmware without bricking the unit.
Symptoms
- PVS or support asked you to confirm a build number before sending a file.
- CarPlay, Android Auto or stability issues keep happening after you've checked cables, pairing resets and power.
- You've been emailed a specific update package for your symptom.
Cause
- Your MK4 doesn't get updates from a public app store. PVS-provided packages are tied to known fixes and hardware revisions.
- If you flash a random forum image or a “generic Android” zip, the partition map can mismatch and drop the unit into a boot loop.
Fix Step-by-step
- Check current build: On the MK4 open Settings → System (or Device) → About device / About tablet. The menus shift a bit depending on the build you're on. Note the Android version, build number and any kernel or MCU/firmware line you can see. Screenshot it for your records and to email to PVS.
- When an update is relevant: Use one when PVS publishes or emails you a package for your issue, or when support asks you to move to a known-good release after you've done the basics: pairing reset, data cable, stable power. Do not flash as the first step for every “CarPlay won't connect” report.
- Safe update rules: Only copy files PVS supplies for your model. Use a small, known-good USB stick formatted FAT32, not exFAT, per PVS instructions. If the port won't read sticks, see USB not recognised. Any USB port works: USB0, USB1 and USB2 all detect an update. If nothing happens when you plug it in, it's almost always the drive format, not the port. Run the vehicle with a healthy battery, engine running is ideal. Insert the USB only when the procedure says to, often from the home screen or a documented recovery path. Don't remove power or unplug USB while you can see a progress bar or “updating” message on screen. Finish one update fully before you try another file.
- After a successful update: Key-cycle once, complete or re-check the first-boot items if you're prompted, then re-test phone projection from phone pairing.
Notes
- First-time wizard & mic: First time on the MK4
- Power & boot: Won't turn on, Has power but won't start
- Freezes / reboots: Resets or freezes
- Phone: Phone pairing
Stop and contact PVS before re-flashing if:
- You used an unofficial or downloaded-from-the-web image.
- The unit boot-loops, stays black after the progress bar finishes, or behaves worse than before.
- You smell burning, you can see damaged pins, or you interrupted a flash by pulling the USB or killing power.
- You've already tried the same file twice without guidance. Send build screenshots and a short video instead.