2010 Ford Fusion Q&A
2010 Ford Fusion Question: What would cause my brakes to hiss when applied?
booster is leaking and must be replaced. Roy - mastertech6371
Wear sensors on brake pads touching rotor , makes noise like 'fingernails on a chalkbord' . If that more closely describes the noise , then have your brakes inspected , if the wear sensor broke off (pad(s) almost metal-to-metal) , might damage rotor(s). - ziptie12