Does salt air really damage a car near the coast?
Salt air speeds up corrosion on exposed metal and hardware. But modern vehicles are far better protected than the ones that gave this reputation its start, and habits matter more than distance from the water.
The parts that suffer are the ones you don't look at: underbody hardware, brake components, fasteners, and anything already chipped or scratched. Paint itself holds up well. What accelerates the damage is leaving salt sitting — after a beach day, after a storm, after driving the approach roads.
Rinsing the underside occasionally does more good than most owners expect. So does a garage or a carport. If you're buying used and the vehicle has lived near the coast, a look underneath is worth more than a look at the odometer.