What issue could arise from using the wrong type of brake fluid?

Using the wrong type of brake fluid can lead to corrosion of brake system components due to the differences in chemical composition and properties between various types of brake fluid. Brake fluids are classified into several types, like DOT 3, DOT 4, and DOT 5, each formulated with distinct additives that offer specific performance characteristics. For example, some brake fluids contain glycol-based substances while others are silicone-based.

If a vehicle is designed for a particular type of brake fluid and a different one is used, it may not be compatible with the materials within the braking system, such as seals and hoses. This incompatibility can lead to the breakdown of these materials over time, resulting in rust, pitting, or other forms of corrosion. Consequently, this corrosion can degrade the performance and safety of the braking system, potentially leading to brake failure or costly repairs.

Understanding the importance of compatibility in brake fluids underscores the necessity of adhering strictly to the manufacturer's recommendations to ensure the reliability and longevity of the brake system.