Car makers Nissan and Kia can collect data on their drivers' "sexual activity" and "sex lives" and may sell the info to third-party advertisers, according to a shocking study by an internet privacy watchdog. The creepy collection of personal information by the two auto companies earned them failing grades from The Mozilla Foundation, maker of the Firefox web browser, which ran privacy checks on 25 car brands. The foundation said most car companies can comb through a variety of sources to glean personal information about drivers after they pair their smartphones with a vehicle's connected services. "This invasive harvesting of information is collected via a web of sensors, microphones, cameras and the phones, apps, and connected services you use in your vehicle," according to Mozilla Foundation. The car firms can then take that data and sell it to or share it with vendors, insurance companies and others. Of the 25 car brands that were reviewed, Nissan's privacy policy "is probably the most ... messed up privacy policy we have ever read," according to Mozilla Foundation. "They come right out and say they can collect and share your sexual activity, health diagnosis data, and genetic information and other sensitive personal information for targeted marketing purposes," the foundation wrote. Mozilla Foundation also flagged other car companies such as Chrysler, Chevrolet, Toyota, Audi, Jeep, and Honda for "brazenly collecting deeply personal information from the moment they get into a car."