Rattle sound when u hit a bump

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. So sorry to hear you're having trouble with your vehicle. If your Sonata started rattling after getting the brakes replaced, it's possible something wasn't appropriately reassembled. The noise could come from loose or improperly secured brake components, like the caliper bolts or brake pads. Another possibility is that a clip or shim might be out of place or missing. Additionally, a loose or damaged suspension part could cause rattling, especially if it was disturbed during the brake job. It's best to have the brakes and suspension inspected to pinpoint and fix the issue. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!