A recent study by the Car Care Council found that nearly 18 percent of vehicles on American roads have brake lines showing signs of significant corrosion or wear. The finding highlights an often-overlooked maintenance item that can lead to catastrophic brake failure without warning.

Brake lines are typically made of steel tubing coated with a protective layer that degrades over time due to exposure to road salt, moisture, and debris. Mechanics report that vehicles older than eight years in northern climates are especially vulnerable, as salt-accelerated corrosion can eat through the tubing from the outside.

Experts recommend visual inspections of brake lines during every oil change and a thorough examination by a qualified mechanic at least once a year. Replacement costs typically range from $150 to $500 depending on the vehicle and the extent of the damage, a fraction of the cost of an accident caused by brake failure.