What is the most immediate safety consequence of a severely corroded brake line near a fitting?

The most immediate safety consequence of a severely corroded brake line near a fitting is the risk of sudden brake failure due to rupture of the line. Corrosion weakens the metal, making it susceptible to bursting under pressure. Brake lines are part of the hydraulic brake system, which uses fluid pressure to activate the brakes. If a brake line ruptures, the hydraulic fluid will leak out, causing a loss of pressure in the system. This loss of pressure prevents the brake calipers from effectively clamping down on the rotors (or brake shoes on the drums), resulting in a significant reduction or complete loss of braking ability. This is especially dangerous near a fitting because fittings are often areas where corrosion is concentrated due to dissimilar metals or trapped moisture. Sudden brake failure creates an immediate and critical safety hazard, increasing the risk of a collision, especially at high speeds or in emergency stopping situations. The driver may not be able to slow down or stop the vehicle, resulting in loss of control.