Yes, Mazda 6 Sedan has Security Alarm, which are: 2018 Mazda 6 Sedan 2.2 SkyActiv-D with G-Vectoring Control, 2018 Mazda 6 Sedan 2.5 SkyActiv-G with G-Vectoring Control, 2019 Mazda 6 Sedan 2.0, 2019 Mazda 6 Sedan 2.5, 2019 Mazda 6 Sedan 2.2 SkyActiv-D.