Apple's Car Keys feature appears to be coming to future vehicles made by Indian maker Mahindra, based on code changes discovered by MacRumors in Apple's Wallet app backend. Car Keys allows an iPhone or Apple Watch with NFC capabilities to unlock a vehicle through the Wallet app. A digital version of a car key is stored in Wallet, and unlocking can be done simply by holding an Apple Watch or ‌iPhone‌ near a compatible vehicle's NFC reader.