- Are rain guards as good as the advertising says? Do they really keep the rain out and don't they make a lot of noise?
- Of course rain guards work! They wouldn't be a sales success year after year if they didn't.
- So why don't the manufacturers make them standard equipment?
- Because the manufacturers make vehicles for the average buyer, and not everybody wants rain guards, or wind deflectors as they are also called.
This is a conversation that can be had about all kinds of auto accessories. The accessories exist because different people have different needs and use their vehicles in different ways.
Some people never drive with the windows open, so of course they don't need or want wind deflectors. They would only be an extra expense and extra trouble. Commuters who park in a parking garage where the sun never shines have no need to keep their windows open while parked and therefore have no need for a rain guard that covers up the window crack. Others have to park in scorching sun, and need to keep air flowing through the car to keep the interior from being scorched. Most of them love rain guards that allow for air to flow through without providing thieves with a way to gain access to the car. With rain guards mounted thieves won't even see if a window is open, without creating suspicion.
A word of warning though: Don't ever leave pets or children in vehicles that are parked in the sun, regardless of windows being cracked open or not. The sun is merciless, and any vehicle parked in the sun can get hot enough to be a lethal trap for pets and children. Rain guards are good to have for protected ventilation, but they don't work wonders.
They work - but not always to your personal satisfaction
If you want to drive at high speed with the side window down, no deflector in the world can make the wind pass by without noise and turbulence. On the other hand, if you want to use them to get more fresh air when driving in cities or country roads where speeds are moderate, the wind deflectors will no doubt reduce the turbulence and noise, compared to driving with the windows down without deflectors.