Wind Deflectors For Volvo 850 From Jun 1991 to Oct 1997. Available here. Wind deflectors add style, functionality and practicality to you vehicle and are a simple DIY product to fit (be sure to watch our fitting video and wind deflector FAQ guide). Car wind deflectors or wind visors as they’re often known, are a great way to let fresh air circulate around the interior of your car or van without the associated wind noise you would normally expect. They also work really well in the rain and can help your windows from steaming up. As such, they’re a popular accessory with people who drive for a living. Their lightly tinted / smoked appearance makes them look great too!