It might come as a surprise, but Google is rolling out a new Android Auto update. We understand the rollout is for stable users, but it will take some time to get across to all regions. Also, there are no major additions, but enough to warrant installing the update.

It is now common knowledge that Google does not release a new Android Auto update with changelog. Even when there are new features, we have to find them out ourselves by testing the build. That is probably what makes the whole experience fun, as we get to know about these new additions before the stable release. However, Android Auto 13.9 went straight to the stable channel.
Google is probably rolling out the update due to a bug since it has to bypass the beta build. Typical of a new Android Auto update, the latest build fixes bugs and optimizes performance. It also reinforced the terminology changes Google has been making since Android Auto 13.5.
Details of the Android Auto 13.9 stable
It is a global release, meaning it is available for everyone. It might take a few days before reaching your country, but you can side-load the APK if you cannot wait.
You will not notice any new changes, but we believe there have been some bug fixes and performance improvements. Also, Android Auto 13.9 has introduced a new terminology. Instead of “Car,” the app now says “Vehicle.” It is not a big change, but you probably need to be aware of that.
How to download Android Auto 13.9 stable update
Since it is a stable release, you can download it from the Play Store. Sometimes, it might take a while to become available in some regions, but that does not stop installing the APK. You can access that via this link.