Re-pair from both ends
A major update changes how iOS negotiates with head units, and a pairing established under the previous version often carries a stale profile. Forgetting the car on the phone alone is usually not enough — the head unit keeps its own record of your phone, and the two must be cleared together.
On the iPhone: Settings → General → CarPlay, select the car and choose Forget This Car. Then, in the car's own Bluetooth or device settings, delete the phone. Restart both, and pair again from scratch. This resolves the majority of post-update CarPlay failures on its own.
Wired and wireless fail differently
A wired connection that does nothing is usually the cable. CarPlay is demanding about cable quality, and a cable that charges perfectly well may not carry data reliably. Try a different one, preferably an Apple or MFi-certified cable, before assuming the beta is at fault.
Wireless CarPlay depends on both Wi-Fi and Bluetooth being enabled on the phone, and a network reset will clear whatever is stuck. Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings costs you saved Wi-Fi passwords and nothing else.
Check the restrictions
Screen Time can block CarPlay without any obvious indication. Settings → Screen Time → Content & Privacy Restrictions → Allowed Apps confirms CarPlay is permitted, and this setting occasionally resets during a major update.
Settings → General → CarPlay also lets you check that the car is still listed at all. If it has vanished from the list entirely, the pairing is gone rather than broken, and you simply need to pair again.
When it is genuinely the beta
If CarPlay works on a second phone in the same car, and your phone works in a different car, the problem is the combination of your build and that head unit. That is a genuine beta bug and worth a Feedback Assistant report — include the car's make, model and year, which is exactly the detail Apple needs to reproduce it.
These are usually fixed within one or two builds, because head-unit compatibility is one of the things Apple tests most heavily before release. Our bug reporting guide covers what makes a report actionable.
When to stop waiting
If you drive daily and CarPlay is how you handle navigation and calls, a broken connection is a safety consideration rather than an inconvenience. Do not spend a month waiting for a later build.
Turn off Beta Updates and restore the previous release from the archived backup you made before installing — our downgrade guide covers the sequence. This is also a good argument for the public beta channel over the developer one on a phone you drive with.
Frequently Asked Questions
Why did CarPlay stop working after the iOS beta?
Usually a stale pairing carried across the update. Forget the car on the phone and delete the phone in the car's own settings, then pair again from scratch.
Does resetting network settings fix CarPlay?
Often, for wireless CarPlay, since it depends on both Wi-Fi and Bluetooth. It clears saved networks and pairings but no other data.
Could the cable be the problem rather than the beta?
Yes, frequently. A cable that charges reliably may not carry data. Try a different MFi-certified cable before blaming the build.
Should I downgrade over broken CarPlay?
If you drive daily and depend on it for navigation and calls, yes. Waiting a month for a later build is not a reasonable trade.