Several iPhone users are reporting issues with CarPlay functionality after updating their handset to iOS 18.4. Users are complaining around the internet, via posts on Reddit and elsewhere.
The most common issue appears to affect vehicles equipped with CarPlay instrument cluster integration. Some users report that after installing the iOS 18.4 update, CarPlay no longer displays the currently playing song information on their car’s instrument panel.
The bug has been reported across several models of vehicles, including the 2025 Honda Civic Hybrid, 2025 Mazda CX-30, multiple 2024 Honda models, several Volkswagen vehicles, the 2023 Audi S3, and the 2023 Nissan Frontier.
Meanwhile, many other users are complaining that CarPlay simply fails to launch after the update, requiring multiple reconnection attempts before the system finally launches. Other users report the Siri audio functionality is broken, despite restarts of both their iPhones and vehicles.
Users say they have attempted the standard troubleshooting steps like device reboots and system resets, but in many cases these workarounds have not resolved the issues.
Apple has not yet acknowledged the CarPlay issues in iOS 18.4, so we don’t know if a fix is in the works.
