What condition related to brake rotors would lead to a failure during inspection?

Scoring or grooves on brake rotors are indicative of significant wear or damage that can adversely affect braking performance. When a rotor is scored or has noticeable grooves, it suggests that there has been a substantial amount of friction and heat generated, which can lead to uneven brake pad wear, reduced contact surface area, and a higher likelihood of brake fade. This condition can compromise the vehicle's ability to stop effectively, which is critical for safety. During an inspection, the presence of these scoring marks would lead to a failure because it poses a direct risk to the driver's ability to control the vehicle safely.

Other conditions listed might not be severe enough to cause an automatic failure during inspection. For example, minor discoloration and surface rust may indicate superficial wear, but they often do not compromise the brake function. Pointing damage could be a potential concern, but it is not as immediately critical as the presence of scoring or grooves, which directly impacts braking efficiency. Therefore, the identification of scoring or grooves in brake rotors is a clear indicator of the need for repair or replacement to ensure the vehicle's safety.