Apple is adding a new Route Sharing feature to iOS 27 CarPlay, and it could help solve one of the more awkward gaps between CarPlay navigation and advanced driver-assistance systems like Tesla FSD.
According to a CNET report published on June 10 during Apple’s 2026 Worldwide Developers Conference, the feature lets navigation apps pass route data to a vehicle as an array of road-segment coordinates. In plain English, the car can receive more precise information about where the driver is going, not just what the iPhone is showing on the CarPlay screen.
That could be especially useful for Tesla vehicles. Tesla FSD, or Full Self-Driving supervised assistance, relies heavily on the car’s built-in navigation system. CarPlay, on the other hand, uses Apple Maps. When Tesla FSD can’t see the destination or route being used in CarPlay, features such as automatic lane changes and navigation-aware driving can’t line up properly with the route on the phone.
Route Sharing is designed to close that gap. The feature allows a navigation app to send the trip to the vehicle in the form of road-segment coordinate data. If the route changes, the data can be updated in real time.
Apple says some vehicles with driver-assistance systems can work better when they know the expected route ahead of time. That may help the vehicle make decisions such as preparing for automatic lane changes or adjusting its guidance behavior to match the route shown in the navigation app.
In actual use, an iPhone connected through iOS 27 CarPlay could send accurate route information to a Tesla’s onboard computer. The integration could also work in the other direction. For example, a Tesla could choose charging stops based on energy estimates, then send those waypoints back to the iPhone so the CarPlay route stays updated.
The idea is not just to mirror a map. It’s to let the vehicle and the phone share enough route context that the driving system, charging plan, and navigation display are all working from the same trip information.
Apple also announced changes for video apps in CarPlay. Developers will be able to build CarPlay apps that support video browsing, which could be useful while waiting at an airport pickup area or charging an electric vehicle.
iPhone apps that support AirPlay video streaming will also be able to project video directly to compatible CarPlay displays. If the vehicle doesn’t support video, or once the driver starts driving, playback will automatically switch to audio-only mode.
For U.S. drivers, the most interesting part is still Route Sharing. If automakers support it well, iOS 27 CarPlay could become much more useful in cars with advanced driver-assistance features. And for Tesla owners who prefer Apple Maps on CarPlay, the feature could make Tesla FSD and the iPhone’s navigation feel less like two separate systems fighting for control of the same trip.
