Which of the following is a brake pad wear indicator?

Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Brake pad wear indicators warn you when the pad material has worn down to a minimum. The most common mechanical indicator is a metal squealer tab attached to the pad backing plate; as the pad wears, the tab makes contact with the rotor or rubs against it, producing a noticeable squeal to signal replacement is due. This direct, audible alert is why the metal squealer is the correct choice. Hydraulic sensors and optical wear gauges exist in some systems, but they are not the typical brake pad wear indicator used on most setups.