Skip to main content
    Step 1 of 5
    Safety & Privacy
    Beginner
    3 min read 5 stepsApril 19, 2026Verified April 2026

    How iPhone Crash Detection Works and How to Set It Up

    iPhone 14 and later can detect a car crash and automatically call 911 if you are unresponsive.

    At a Glance

    Category
    Safety & Privacy
    Difficulty
    Beginner
    Read Time
    3 min read
    Steps
    5
    Topics covered
    iPhone
    crash detection
    emergency SOS
    safety
    iPhone 14

    In this guide (5 steps):

    1. 1.Check If Your iPhone Supports Crash Detection
    2. 2.Verify Crash Detection Is Enabled
    3. 3.Set Up Emergency Contacts
    4. 4.Know What to Expect After a Crash
    5. 5.Review Medical ID Information
    1

    Check If Your iPhone Supports Crash Detection

    ~16s
    Crash Detection is available on iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, and all iPhone 15 and iPhone 16 models. It is not available on earlier iPhones. Go to SettingsEmergency SOS to see if Crash Detection appears.
    2

    Verify Crash Detection Is Enabled

    ~15s
    Go to SettingsEmergency SOS. Look for "Crash Detection" or "Call After Serious Crash" — make sure the toggle is on. It is on by default on supported models.
    3

    Set Up Emergency Contacts

    ~22s
    Go to the Health app on your iPhone → tap your profile photo → "Medical ID" → "Edit." Add at least one emergency contact. These contacts receive a text message with your location when Crash Detection (or Emergency SOS) activates.

    Quick Tip

    Add a family member or close friend as your emergency contact — someone who would want to know right away if you were in a crash.

    4

    Know What to Expect After a Crash

    ~30s
    If Crash Detection activates, your iPhone sounds an alarm and shows a countdown screen. It announces: "It looks like you've been in a crash." You can tap "I'm OK" to cancel, or tap "Emergency SOS" to call right away. If no action is taken in 10 seconds, the phone calls 911 automatically.

    Quick Tip

    If you are fine and a false alarm occurs, tap "I'm OK" quickly. If you accidentally trigger the call to 911, stay on the line and explain it was a false alarm — dispatchers are accustomed to this.

    5

    Review Medical ID Information

    ~21s
    Since Crash Detection shares your Medical ID with 911, make sure it is accurate and complete: blood type, allergies, medications, and a note about any important medical conditions. First responders can view this even on a locked iPhone.

    Warning

    Crash Detection is designed for severe crashes, not minor fender benders. It activates when the sensor readings show a potentially life-threatening impact. Minor accidents may not trigger it.

    You Did It!

    You've finished reading: How iPhone Crash Detection Works and How to Set It Up

    How well did this guide stick with you?

    Need more help? Book a TekSure tech

    Crash Detection is a safety feature on iPhone 14 and later (all models). If your iPhone senses you've been in a severe car crash, it sounds an alarm and shows an emergency SOS screen. If you don't respond within 10 seconds, it calls 911 on its own, shares your GPS location with emergency services, and sends your location to your emergency contacts.

    Crash Detection uses several sensors together: the barometer, microphone, GPS, and the accelerometer, which measures sudden changes in speed and direction. The system is trained to recognize the motion and sound of a real car crash, not ordinary bumps or hard braking.

    For most people, Crash Detection works on its own in the background. No setup is needed beyond having an iPhone 14 or later with Emergency SOS and Medical ID turned on. Still, it's worth checking that your Medical ID and emergency contacts are accurate, since that information gets shared with 911 when Crash Detection kicks in.

    False alarms do happen sometimes. Crash Detection has gone off for some people during intense roller coaster rides or skiing trips, because the motion looks like a crash. If an alert appears and you're fine, tap "I'm OK" within 10 seconds to cancel the call.

    Crash Detection works even if your iPhone is in low-power mode or in a pocket or bag. You don't need to be using the phone. It runs quietly in the background at all times on supported models.

    Rate this guide

    How helpful was this guide?

    iPhone
    crash detection
    emergency SOS
    safety
    iPhone 14

    Official Resources

    FTC Consumer ProtectionCISA — Cybersecurity TipsAARP Fraud Watch Network

    Sources used to create and verify this guide. View all sources →

    ← Previous

    How to Cancel Amazon Prime (and What You Lose When You Do)

    Next →

    How to Set Up and Use Android Emergency SOS

    Still stuck? Let a pro handle it.

    A real person can walk you through this over the phone, anywhere in the US. If we can't fix it, you don't pay.

    Book a Verified Tech How It Works

    Learn more from official sources

    Related Guides

    How to Secure Your Home Wi-Fi Network

    Simple steps to lock down your home router, keep strangers off your network, and protect every device in your house.

    3 min read

    Setting Up Two-Factor Authentication (2FA) on Any Account

    Add a second layer of security to your most important accounts. This one change stops most account takeovers cold.

    3 min read

    Staying Safe on Social Media

    How to protect your privacy on Facebook and Instagram, spot fake accounts, and avoid the most common social media traps.

    3 min read