When Should I Replace My Brake Pads?

Warning indicators: on many pads, a small metal wear indicator touches the disc once the pad is thin and produces a persistent, high-pitched squeal when braking; some vehicles use an electronic sensor that lights a pad-wear warning on the dashboard instead. Inspection findings: pads that look thin through the wheel spokes, or that a technician finds worn unevenly, cracked, or glazed. Braking symptoms (a longer stopping distance, a pedal that travels further, vibration, or pulling to one side) also warrant an inspection, but they can come from other parts of the brake system as well as the pads, so they shouldn't be assumed to mean pads alone.

Don't wait for a grinding sound, which usually means the friction material is gone and metal is contacting the disc. Emergency signs: if the pedal feels soft or sinks towards the floor, the red brake warning light stays on while driving (with the parking brake released), or the car pulls sharply when braking, stop driving and arrange for the vehicle to be inspected or transported.

Not in a simple, gradual way. A pad doesn't lose braking power just because it is thinner. While enough friction material remains and the rest of the system is healthy, braking is designed to stay consistent.

Problems build as a pad nears the end of its life: with less material to absorb and shed heat, thin pads can overheat and fade sooner under hard or repeated braking, such as long mountain descents; worn pads can crack, glaze, or separate from their backing plate; and once the friction material is gone, metal-to-metal contact damages the disc and seriously reduces braking. Stopping distance also depends on the condition of the discs, calipers, brake fluid, tyres, and ABS, not on pad thickness alone, which is why the whole brake system is inspected rather than just the pads being measured.

Pad life varies widely with the vehicle, the pad material, and how the car is driven, so there is no single mileage figure that suits every car.

Stop-start city traffic in Muscat, with frequent low-speed braking in queues, at roundabouts, and at traffic signals, applies far more braking cycles per kilometre than steady highway driving, and mountain roads with long descents also work the brakes hard. Checking pad thickness and brake condition at each service, rather than relying on a fixed mileage estimate, is the more reliable approach for city-driven vehicles.