Apple Digital Car Key Updates in iOS 15

With the release of iOS 15, Apple significantly enhanced its digital car key feature in the Wallet app, transforming compatible iPhones and Apple Watch models into advanced replacements for physical key fobs. The update moved the platform beyond basic near-field communication (NFC) tapping by introducing Ultra-Wideband (UWB) technology, precise spatial awareness, and remote control capabilities, while laying the groundwork for broader automaker adoption.

Ultra-Wideband Support for Passive Entry

The most substantial architectural upgrade in iOS 15 was full support for Ultra-Wideband technology via Apple's U1 chip. Prior to this update, drivers had to physically hold their iPhone or Apple Watch near the car's door handle to lock or unlock the vehicle via NFC. With UWB, passive entry became available: users can unlock, start, and drive their car without removing their iPhone from their pocket or bag.

Precise Spatial Awareness

Alongside UWB integration, iOS 15 introduced advanced spatial awareness. The system precisely pinpoints the device's location relative to the vehicle. This prevents security risks, such as accidentally locking an iPhone inside the cabin or enabling the ignition when the phone is outside the vehicle. The car will only start if the device is confirmed to be inside the passenger compartment.

Remote Keyless Entry Controls

iOS 15 expanded the Wallet app interface to include standard remote keyless entry (RKE) buttons. If supported by the vehicle manufacturer, users can perform standard fob actions directly from their screen:

  • Locking and unlocking the doors from a short distance.
  • Popping the trunk or tailgate.
  • Activating the panic alarm or horn.
  • Initiating remote climate control or engine start.

Express Mode with Power Reserve

The update retained and optimized Express Mode, which allows digital car keys to operate without requiring Face ID, Touch ID, or a passcode authentication. Coupled with the power reserve feature, digital keys remain functional for up to five hours even after the iPhone’s battery has depleted, ensuring drivers are not stranded due to a dead battery.

Expanded Automaker Adoption

While Apple’s car key feature initially launched with select BMW models, iOS 15 marked the beginning of broader multi-brand compatibility. Over the course of the iOS 15 release cycle, Apple worked with the Car Connectivity Consortium (CCC) to establish standardized digital key protocols, which enabled manufacturers like Genesis and Kia to begin rolling out compatible models alongside BMW.