Hi there! I see you’re having trouble updating HERE WeGo Maps on your Android 12 car head unit. To help you better, could you tell me a bit more about what exactly happens when you try to update? For example, do you get an error message, or does the update just not start? Also, are you updating from the Google Play Store on your head unit or using another method?

Meanwhile, here are some common causes and steps you can try to resolve this:

1. Check Internet Connection
Ensure your head unit is connected to a stable Wi-Fi or mobile hotspot. Updates require a reliable connection.

2. Verify Google Play Store and Services
Since HERE WeGo updates through Google Play Store, your head unit's Google Play Services and Play Store apps must be up to date and functioning properly. Sometimes, on Android 12 head units, Google Play Services don’t update automatically, which blocks app updates.
Try going to Settings > Apps > Google Play Services and Google Play Store, clear their cache, and then attempt to update HERE WeGo again.

3. Install from Google Play Store Only
If you tried sideloading or using third-party app stores, the update might fail. HERE WeGo must be installed and updated through Google Play Store on the head unit for it to work correctly.

4. Free Up Storage Space
Low storage can prevent updates. Check your head unit’s storage settings and free up space if necessary.

5. Restart Your Head Unit
A simple reboot can sometimes clear temporary glitches blocking the update process.

If you’ve tried these already, please let me know! There are also cases where pre-installed apps on some head units have compatibility restrictions that prevent updating beyond a certain version. In that case, contacting your head unit’s manufacturer or HERE support can help.

Would you like me to guide you through the steps to check/update Google Play Services on your Android 12 head unit? I found some tutorials if you need detailed help.

Looking forward to your details so I can assist further!