Amazon, which is already opening front doors for parcel delivery, now wants to offer the same service for vehicles.

The online giant said its Amazon Key, which enables in-home delivery and keyless guest access, now offers US customers an option for deliveries inside their vehicle, if it has the right technology and is parked in a publicly accessible area.

"Since launching Amazon Key last November, we've safely delivered everything from cameras to collectable coins inside the home," said Amazon vice president Peter Larsen.

"In-car delivery gives customers that same peace of mind and allows them to take the Amazon experience with them. And, with no additional hardware or devices required, customers can start ordering in-car delivery today."

The in-car deliver for US customers requires a compatible 2015-or-newer Volvo or GM product with an active On Call or OnStar account.

Amazon said support for even more vehicle makes and models will be added over time.

Customers download the Amazon Key App and link their Amazon account with their On Call or OnStar account. Once setup is complete and a delivery location is registered, customers can shop on Amazon.com and select the “In-Car” delivery option at checkout. On the day of delivery, a delivery driver will deliver the package during the scheduled time window (using digital key sharing to unlock the vehicle) and customers will be notified when the delivery is completed and the car is safely locked.

"Receiving a package securely and reliably in your car, without you having to be there, is something we think many people will appreciate," said Atif Rafiq, chief digital officer at Volvo Cars.

"This intersection between transportation and commerce could very well be the next wave of innovation, and we intend to be at the forefront."

Amazon said it uses "multiple layers of verification" to ensure security of in-car deliveries, which allow for unlocking and relocking of the vehicle and notification via the Amazon Key application.

Amazon Key was introduced last year as a secure and trackable way for packages to be delivered inside homes when people aren't there, using internet-connected locksets.

Agence France-Presse