3. Infiniti
What makes Infiniti one of the easiest and cheapest luxury cars to maintain is the thing, that, being the luxury division of Nissan, it has many parts same as Nissan cars. While prices of some Infiniti models are close to Nissan models, even the producers themselves recommend Infinity over Nissan because of additional preferences Infinity has, such as Safety Shield, which is one of the best of that kind in vehicles in general.