What does a contaminated friction surface indicate during a brake inspection?

A contaminated friction surface during a brake inspection is a significant concern, as it can lead to compromised braking performance. When the friction surface, such as the brake pads or rotors, is contaminated with substances like oil, grease, or moisture, it impairs the ability of the brakes to generate sufficient friction. This may result in reduced stopping power, increased stopping distances, or inconsistent brake response, all of which pose safety risks while driving.

Identifying a contaminated friction surface necessitates further investigation and potential repairs to ensure that the braking system operates safely and effectively. An inspection revealing this contamination indicates a need for service rather than simply being a minor issue or a sign of normal operation. Thus, it is crucial to address any contamination to maintain vehicle safety and performance.