Why Don't Some Cars Have Rear Wipers?

Your Car's Shape Determines Whether It Needs A Rear WiperAt first glance, it would seem like every car should have a rear wiper. On sedans, air traveling over the roof continues smoothly down the rear glass and over the trunk. One owner noted that rear wipers become especially useful in stop-and-go traffic, where airflow is no longer keeping the rear glass clear. Some sports cars and performance hatchbacks, meanwhile, include rear wipers despite their sleek shapes. It's Not (All) About Saving MoneyAt first, it might seem like manufacturers omit rear wipers simply to cut costs (and some of that might be true).