Adding a car key to an iPhone requires going through the manufacturer's app and then pairing the phone to the car via NFC.

GM launches a beta test of the smartphone Digital Key for 2026 Cadillac Lyriq and Optiq owners, delivering keyless entry via ...

Cadillac has its own smartphone application that has various remote controls and luxury add-ons called the myCadillac app. Cadillac owners get access to perks such as a vehicle locator, voice ...

You can jump-start a V8 with a four-cylinder car as long as you have enough amps. The number of cylinders doesn't actually matter, but weight does.