Karma Automotive (Karma) is recalling certain 2018 Karma Revero vehicles. In the event of a roll over crash, the side curtain/head protection air bags may not deploy as intended due to a rollover sensor system that is not enabled. The system also lacks an instrument cluster warning light and a description of the system in the owner’s manual. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 226, “Ejection Mitigation.”