Porsche Cars North America (Porsche) is recalling certain 2017-2018 Porsche Panamera, Panamera 4, Panamera 4S, Panamera Turbo, Panamera 4S Executive, Panamera Turbo Executive, 2018 Panamera 4 Executive, Panamera 4 E-Hybrid, Panamera Turbo S E-Hybrid, Panamera 4 E-Hybrid Executive, Panamera S E-Hybrid Executive, Panamera 4 Sport Turismo, Panamera 4S Sport Turismo, Panamera 4 E-Hybrid Sport Turismo, Panamera Turbo Sport Turismo, and Panamera Turbo S Sport Turismo vehicles. A software failure may result in an intermittent loss of electric power steering assist.