Road salt causes rust and damage to cars through a chemical reaction. When salt is spread on icy roads, it mixes with moisture to create a saline solution. This solution can stick to a vehicle's undercarriage and body. Salt accelerates the process of oxidation (or rusting) of metal, particularly in the presence of water. This leads to faster deterioration of metal parts, including the exhaust system, muffler, coil springs, subframe, and hydraulic brake system. Regular maintenance and cleaning, especially during winter, are essential to mitigate these effects.