Transponders; databus interfaces for use in vehicle door locking and unlocking, car alarms starting and disabling, trunk release, and engine starting and disabling, and for gathering information about vehicle components and driving data, for keyless driving of vehicles, for keyless sharing of vehicles; radio transmitters and receivers for remote control of vehicles, to gather information about vehicle components and driving data, for keyless driving of vehicles, for keyless sharing of vehicles, and for vehicle door locking and unlocking, car alarms starting and disabling, trunk release, and engine starting and disabling; vehicle cellular radios and global positioning satellite receivers used to provide vehicle tracking and security, to gather information about vehicle components and driving data, for keyless driving of vehicles, for keyless sharing of vehicles, and for vehicle door locking and unlocking, car alarms starting and disabling, trunk release, and engine starting and disabling; mobile application used to gather information about vehicle components and driving data, for keyless driving of vehicles, for keyless sharing of vehicles, and for vehicle door locking and unlocking, car alarms starting and disabling, trunk release, and engine starting and disabling