Oct 18 , 2019

Why Don’t All Cars Have a Rear Windshield Wiper?

In poor weather conditions a rear windshield wiper provides clear vision through your rear view mirror’s line of sight. As a bonus, it usually allows for the incorporation of a washer-fluid dispenser that can improve vision in dry conditions, too. Rear wipers come standard on SUVs and many hatchbacks, but why don’t all cars have one?

Changing wiper blades is an easy three-step process.

Is a Rear Windshield Wiper Even Necessary?

Many opinions exist regarding the absence of rear windshield wipers on sedans. Some claim that because of the aerodynamics of a sedan, it doesn’t require one: Windshear alone does a fine job of driving water, snow and debris from the surface of the glass.

Others point to the body style: The length of the trunk compartment acts as a buffer between the wheel spray and the window, preventing it from settling on the glass.

Another opinion returns to aerodynamics, suggesting that air movement over the top of a sedan would lift the wiper from the surface of the glass, making it useless.

This is how to get more life out of your windshield wiper blades.

Rear Windshield Wiper Manufacturing Considerations

There are all sorts of possible reasons that car makers might choose to leave off a rear windshield wiper. Some that top the list: Lack of space to conceal a rear windshield wiper motor and washer-fluid reservoir, the added cost of the system, weight reduction considerations (to meet fuel-efficiency standards), increased drag (which disrupts aerodynamics, and once again, fuel efficiency) and cosmetic appeal.

Silence those screeching windshield wiper blades.

Rear Windshield Wiper: The Final Word

The most satisfying answer in the end? Because the car designer decided not to put one there. Exactly why they made that decision could well have to do with any of the speculations above, as determined by their unique set of traditions, values and sensibilities.

Defrost that windshield—and fast!

Check out these 20 driving hacks.

The Family HandymanHow to Change Windshield Wipers When you're behind the wheel, nothing is more crucial than good visibility. But like most other drivers, you usually wait too long to replace your wipers. Wipers should be replaced every six months, especially if you park outside and you live in the desert or in other dusty conditions. See more of our hints on replacing windshield wipers and discover the best wiper blade on the market.

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