![Car is making a rattling sound on start up and acceleration, checked under the car and saw this. Anyone have any idea what it is? Is it serious enough to not drive Car is making a rattling sound on start up and acceleration, checked under the car and saw this. Anyone have any idea what it is? Is it serious enough to not drive](https://preview.redd.it/2302ds11e9n71.jpg?width=640&crop=smart&auto=webp&s=ab50bbe191fd4f7297e72fd05faefc6c632ed302)
Car is making a rattling sound on start up and acceleration, checked under the car and saw this. Anyone have any idea what it is? Is it serious enough to not drive
![rattle - 09 Mazda 6: Metallic rattling sound when accelerating at low speeds - Motor Vehicle Maintenance & Repair Stack Exchange rattle - 09 Mazda 6: Metallic rattling sound when accelerating at low speeds - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/XjTPa.jpg)
rattle - 09 Mazda 6: Metallic rattling sound when accelerating at low speeds - Motor Vehicle Maintenance & Repair Stack Exchange
![hello all I have a rattling noise underneath my car and can it be coming from the catalytic converter? : r/S2000 hello all I have a rattling noise underneath my car and can it be coming from the catalytic converter? : r/S2000](https://external-preview.redd.it/yC6QnNMTTdVpnxuDJ8BTpMJnmqqSYdi31L3zqZLeo8M.png?width=640&crop=smart&format=pjpg&auto=webp&s=f8b938c13e479881b4fb2fb24a0d561af84d179f)