Abstract: A worn lining warning indicator used on a disc brake is disclosed. The indicator includes a projection which extends from the edge of the friction element and which wears away as the friction lining wears. A spring arm is carried by the friction element and includes a portion which extends over the periphery of the projection and also over the periphery of the rotor. Initially, when the brake linings are new, the projection on the friction element supports the resilient member away from the periphery of the disc. However, when the linings have worn an amount sufficient to wear the projection away, the resiliency of the member biases the end of the latter into engagement with the periphery of the rotor. The engagement of the resilient member with discontinuities on the rotor periphery produces a unique, pulsating, "picket fence" noise as the rotor rotates to thereby warn the vehicle operator that the brake linings need replacement.