Man that video at the end of the view of the axle from underneath while driving — two separate fan enclosures with small sheet-metal straps and fiddly little electronics-case screws, all facing down toward the road and right behind the wheels?

This is not a place where you put fans, or big openings into the kind of electronics you need fans to cool, if you want them to keep functioning while driving through salty slush and mud.

Seems perfect for Southern California