Kia Optima brake trouble light indicates issue with one brake, occurs only in rain on Kia Optima

Some Kia Optima owners report experiencing issues with the brake trouble light, particularly when it indicates a problem with one brake during rainy conditions. These issues may stem from moisture affecting the brake pads or discs, leading to reduced braking efficiency in wet weather. Additionally, some owners have noted water ingress into the brake system, resulting in temporary malfunctions when the components get wet. Corrosion or rust on brake parts can also worsen in rainy conditions, impacting the performance of a specific brake. It is crucial for owners to have their brake systems thoroughly inspected by a qualified mechanic to diagnose and address these issues promptly, ensuring the safety and proper functioning of their vehicle's braking system.