What exactly is required for Apple's Find-my-car feature to work? My friends and I have noticed inconsistent results with Apple's feature to find your parked car. We've all seen it work sometimes, but not always. 

The feature I'm talking about is described here: http://www.idownloadblog.com/2016/06/14/apple-maps-ios-10-parking/ 

As I understand it, you must have Car Play or Bluetooth in your car, you must have iOS 10.x or greater, and have Apple Maps installed. Beyond that, how does this work? 

I've tried a couple of times lately to test this, making sure that Bluetooth is connected during the trip. After arriving, I can ask Siri: "Where's my car?" and I get: 

Sorry, I don't see any saved parking locations.

It seemed to be working reliably for a user with Car Play.  Is that required?
Yes, you must have a CarPlay device &amp; the iPhone must connect to it when you get in the car &amp; disconnect as you leave.
That is the trigger to update your Parked Location.

It works over either direct connection on Lightning cable, or using Bluetooth, though if your CarPlay is set to Lightning, it will not update if you have Bluetooth on, but don't manually switch to it - CarPlay does not 'auto-swap' to Bluetooth if you don't plug it in.

Apple documents this here:


https://support.apple.com/en-us/HT207227


The location privacy can show you frequent locations as well as parked locations, so if you have disabled that location tracking, you could expect maps to not mark your Bluetooth disconnect locations. Also, not pairing to Bluetooth would likely prevent is feature from working 

(Information source in addition to above is personal experience &amp; wondering how the heck it sometimes worked &amp; sometimes didn't ;)