Android Auto beta is suddenly open again, but you’ll need to be quick
Source: Android Authority

TL;DR
- Google has reopened the Android Auto beta program and is currently accepting new testers.
- The beta program is usually full because Google keeps a strict limit on the number of participants.
- Interested users should hurry, as available spots are likely to disappear quickly.
Android Auto beta is open again
Google has quietly reopened the Android Auto beta program (h/t Reddit user the_uker), giving users another rare chance to sign up as testers.
How to join
- Visit the Google opt‑in page for Android Auto.
- Click Become a tester.
- Follow the on‑screen instructions to enroll.
Note: The sign‑up button may be grayed out or display a “beta has reached capacity” message when the program is full.
Why the beta is limited
Android Auto controls critical driving functions such as navigation, communication, and media playback. Because bugs could affect safety, Google imposes a tight limit on the number of beta participants, unlike the broader Android beta program that is open to most Pixel and partner devices.
What to do now
If you’ve been waiting for early access to upcoming Android Auto features, this is a good time to join. Spots are expected to fill quickly, so act promptly.