Which conditions can lead to brake system corrosion?

Brake system corrosion is primarily influenced by exposure to moisture and contaminants. Moisture can come from various sources, such as rain, humidity, or water splashing on the vehicle. When combined with road salt, which is often used to de-ice roads in winter, this combination can create a highly corrosive environment. The salt accelerates the corrosion process by promoting rust formation on metal components of the brake system, such as brake rotors, calipers, and lines. This deterioration affects the efficiency and effectiveness of the brake system, leading to potential safety hazards.

In contrast, high-temperature environments alone do not directly contribute to corrosion; instead, they may cause wear on brake components due to heat but do not create the wet environment necessary for rusting. The use of synthetic oil does not typically have a correlation with brake system corrosion, and low humidity levels can actually reduce the risk of corrosion rather than increase it because dry conditions lessen the likelihood of moisture accumulation. Thus, the correct answer involves recognizing the specific role that moisture and road salt play in fostering an environment conducive to corrosion.