Brake wear indicator is a device which is used to measure the thickness of the brake pad. It is generally a metallic strip which is attached to the caliper piston. As the brake pad wears down, the distance between the top of the brake pad and the bottom of the wear indicator increases. When this distance reaches a certain limit, it will trigger a warning light on the dashboard, indicating that it is time to replace the brake pads.
The answer to how long you can drive with brake wear indicator really depends on how thick your brake pads are to begin with. If you have thicker pads, you will have more leeway before needing to replace them. However, if you have thinner pads, it is best to replace them as soon as possible once your wear indicator goes off.
In general, most people recommend replacing your brake pads as soon as possible once your wear indicator goes off. This is because brakes are one of the most important safety features on your car, and worn-out brakes can significantly reduce their effectiveness. Additionally, waiting too long to replace your brake pads can damage other components of your braking system, such as your rotors. Therefore, it is always best err on the side of caution when it comes to replacing your brakes!