CarPlay stops working because your phone and car are not talking to each other properly

Apple CarPlay is a system that mirrors your iPhone onto your car's dashboard screen so you can use maps, music, and calls without holding your phone. When it won't connect, the problem is almost always one of three things: the cable between your phone and car is loose or damaged, your car's system needs to restart, or your iPhone's software is out of date.

The connection can break even after it has worked for months. This does not mean your phone or car is broken — it means the wireless or wired link between them got interrupted, the same way your home WiFi sometimes needs you to unplug the router and plug it back in.

Key Takeaways

  • CarPlay uses either a USB cable (wired) or WiFi (wireless), and a loose cable is the most common reason it stops working.
  • Restarting your car's system and restarting your iPhone often fixes the connection without any other steps.
  • Your iPhone's iOS version must be current, and your car's software must be compatible with your phone's iOS version.
  • If you use a third-party USB cable instead of Apple's cable, it may not work with CarPlay even if it charges your phone fine.

Check the USB cable if you use wired CarPlay

If your car connects to your iPhone through a cable plugged into the dashboard, start by looking at the cable itself. Pull it out of both the car and your phone, then look at both ends for bent pins, fraying, or discoloration. Even a tiny bend in the metal pins inside the connector can stop CarPlay from working while the cable still charges your phone fine.

Plug the cable back in firmly — it should click or seat with a small amount of resistance. If it slides in too easily or feels loose, the connector may be worn out. Try a different USB cable if you have one, preferably an Apple-certified cable (look for the "Made for iPhone" label on the package or the cable itself). Many third-party cables work for charging but not for CarPlay because they do not support the data connection CarPlay needs.

If you have never used a cable and your car has wireless CarPlay, skip this section — your connection is WiFi-based, not wired.

Restart your car's system and your iPhone

Before you buy anything or change settings, restart both devices. Turn off your car's engine completely and wait 30 seconds, then start it again. This resets the car's infotainment system (the dashboard computer that runs CarPlay).

While the car is restarting, restart your iPhone: press and hold the side button and either volume button until the power-off slider appears, then slide to power off. Wait 10 seconds, then press and hold the side button again until you see the Apple logo. Once both devices are back on, unlock your iPhone and get in the car. CarPlay should reconnect within a few seconds.

This step fixes the problem in roughly half of all CarPlay connection issues because it clears out temporary glitches in both systems' memory.

Update your iPhone's iOS if it is out of date

CarPlay only works when your iPhone is running a version of iOS that your car's system supports. If your phone is several versions behind, the car may refuse to connect.

Go to Settings on your iPhone, tap General, then tap Software Update. If an update is available, connect to WiFi and plug your phone into power, then tap read and Install. This can take 15 to 30 minutes. Once the update finishes, restart your iPhone and try CarPlay again.

You do not need to update to the absolute newest iOS version — most cars support iOS versions from the past two or three years. But if your phone is running iOS from more than three years ago, your car may not recognize it.

Forget the car's WiFi network and reconnect

If your car uses wireless CarPlay (no cable), your iPhone connects through your car's WiFi network. Sometimes this connection gets stuck and needs to be reset.

On your iPhone, go to Settings, tap WiFi, and find your car's network name in the list (it usually includes your car's make or model, like "BMW-CarPlay" or "Toyota-WiFi"). Tap the information icon (the small circle with an i) next to the network name, then tap Forget This Network. Now go back to your car's settings and look for an option to reset or restart CarPlay or WiFi. Once that is done, go back to your iPhone's WiFi settings and reconnect to your car's network by tapping it and entering the password if prompted.

Check that Siri is turned on and your phone is unlocked

CarPlay will not connect if Siri (Apple's voice assistant) is turned off on your iPhone. Go to Settings, tap Siri & Search, and make sure the toggle next to "Listen for 'Hey Siri'" is turned on (it should be green).

Also, your iPhone must be unlocked the first time you connect to a new car. Once you unlock it and allow CarPlay to connect, future connections in that car will work even if your phone is locked. If you are trying to connect to a car for the first time, unlock your phone and wait for a prompt asking you to allow CarPlay — tap Allow.

Verify your car's software is current

Your car's infotainment system also needs to be up to date. The steps to update vary by car brand — some update automatically over WiFi when parked, while others require you to visit a dealer or use a USB drive.

Check your car's manual or the manufacturer's website for your specific model year. If your car is more than five or six years old, it may not support the current version of iOS on your iPhone, and no amount of restarting will fix that. In that case, you would need to use a different iPhone with an older iOS version, or use a different system like Android Auto if your car supports it.

Frequently Asked Questions

Does CarPlay work without WiFi or a cable?

No. CarPlay requires either a USB cable plugged into your car's dashboard or a WiFi connection to your car's network. If your car has neither, CarPlay cannot work. Some older cars only support wired CarPlay, not wireless.

Why does CarPlay disconnect every time I turn off the car?

This is normal. CarPlay disconnects when you turn off the engine because the car's system powers down. It reconnects automatically the next time you start the car and unlock your iPhone. If it does not reconnect after 10 seconds, try the restart steps above.

Can I use any USB cable for CarPlay?

No. CarPlay requires a cable that supports data transfer, not just charging. Apple's official cable works, and so do third-party cables labeled "Made for iPhone" or "MFi-certified". Regular charging cables often do not work for CarPlay even though they charge your phone fine.

What if I have done all these steps and CarPlay still will not connect?

Your car's infotainment system may need a factory reset, which erases all saved settings and connections. Check your car's manual for how to do this — it usually involves holding a button on the dashboard for 10 to 15 seconds. After the reset, reconnect your iPhone and allow CarPlay again.

Does my car need to be connected to the internet for CarPlay to work?

No. CarPlay itself does not need internet — it just needs the connection between your phone and car. However, some apps you use through CarPlay (like maps or music streaming) do need internet, which usually comes through your iPhone's cellular data or a hotspot.