Would you give Amazon access to the trunk of your car? Some people have already given the company access to their homes via the Amazon Key program, which has now expanded to Amazon Key In-Car.

Customers with newer model GM and Volvo cars in 37 US cities can now allow Amazon to unlock their car and leave packages inside according to cnet.com.

The in-car service is free to Amazon Prime Members and begins today in 37 U.S. cities that offer the option. The service only works with newer cars from GM and Volvo.