Check engine light, a quick primer
Any grinding or growling results from metal on metal scraping; your brake pads have most likely worn down. Brake repair experts recommend that you get your car in to your repair shop as soon as any of these signs appear, before the problem escalates. Brake repair experts also recommend annual brake inspection (and repair, if needed), or twice a year inspections if you use your vehicle for heavy hauling and towing work. Any deviation from quick and quiet brake functionality should be checked as soon as possible. Brake fluid inspection for possible moisture or metal flake contamination is an essential component of proper brake service and repair.