You just replaced the pads and the brakes STILL squeak - frustrating after spending time and money. A little early noise is normal, but persistent squeal on new brakes has a short list of causes. Here is how to track it down.
They need to bed in
Fresh pads and rotors squeal until they are bedded - a series of moderate stops that seats an even transfer layer; see how to bed in brake pads. A few days of light early noise is normal - see brake noise after new pads - and often clears once they are heat-cycled. Skipped bedding is a top cause of new-brake noise.
Missing shims or hardware
If the pads were installed without their damping shims, or with old worn shims and clips reused, they vibrate and squeal - see when to replace hardware. Fresh anti-rattle hardware and shims are essential for quiet new brakes; reusing tired hardware is a common mistake.
Cheap pads or no grease
Bargain pads that skip chamfers, slots, and shims squeal no matter what; see quietest brake pads. And missing high-temp grease on the pad contact points and slide pins lets them vibrate - see where to apply brake grease. Quality pads plus proper grease make a big difference.
How to quiet them
Bed the pads in properly, confirm shims and fresh hardware are installed, grease the contact points, and if you used bargain pads consider quality ceramics. Most new-brake squeal traces to one of these - see why brakes squeak. Fit quality pads with a full hardware kit.