If you have GROM Bluetooth Adapter for hands free phone calls and wireless music streaming (GROM-BT3), or GROM Bluetooth Dongle, you can easily use "Find my car" feature available for Apple iOS 10 devices.
All you need to make sure is that your phone is connected to GROM Bluetooth.
You need an iPhone 6 or later and iOS10 to use this Maps feature. Also make sure to:
1. Turn on Location Services in Settings ->Privacy->Location Services
2. Make sure that Frequent Locations is on Settings -> Privacy -> Location services -> System Services -> Frequent Locations -> Frequent Locations.
3. Turn on "Show Parked Locations" Go to Settings -> Map -> Show parked location
And make sure that you are paired to GROM Bluetooth in your vehicle.
When you leave your car, the iPhone will disconnect from GROM Bluetooth. It will alert Map to mark your vehicle location. You can also edit location of your car by opening in Maps and taping to the car's icon.