BMW's Digital Key Plus is a more advanced version of a traditional car key. It can perform all the same functions as a regular key, like locking/unlocking the doors and starting the engine. However, with the use of ultra-wideband tech (UWB), the key has additional benefits. The UWB creates a localized radio signal that provides better security at close range, and was developed with the help of Google and other partners to greatly reduce the risk of signal interception or jamming.
The automaker's Digital Key system has been available for a few years, allowing owners to access and start their cars but Digital Key Plus takes it a step further by making the functionality automatic. Instead of placing the phone on the vehicle's wireless charging tray to start the car, Digital Key Plus devices can stay in your pocket. Similarly, automated functions set up by the vehicle owner such as exterior lighting when approaching the car work identically to the standard key remote.
While Digital Key Plus is new to Android users, it actually launched for the iPhone and Apple Watch back in 2021. Not all Android phones have compatibility with the app, however. Right now, BMW lists Digital Key Plus as being available for Samsung Galaxy S23+ and Ultra models, Google Pixel 7 Pro, and certain older Samsung/Google models running Android 13.1 or later.
Similarly, it's only available on BMW vehicles offering Digital Key Plus functionality and as of now, that applies to very recent Bimmers built after November 2022. Plans are in the works for an OTA update that will expand the functionality to older models, though BMW doesn't offer details of when that will take place or how far back it will go.
Source: BMW
