Infiniti Q50a is a luxury mid-size sedan from the Infiniti brand, which is the luxury division of Nissan Motor Company. The Q50a is a four-door sedan that is powered by a 3.7-liter V6 engine and is available with either rear- or all-wheel drive. The Q50a has a long list of standard features including a rearview camera, a moonroof, dual-zone climate control, navigation, Bluetooth, and keyless entry.