There are a few things you must prove to sue a manufacturer successfully. First, you must show that the product was defective and that this defect caused your injury.u003cbr/u003eu003cbr/u003eNext, you must show that the manufacturer knew or should have known about the defect and failed to take appropriate action. Finally, you must show that you were injured due to the defect. If you can prove all of these things, you can recover damages from the manufacturer.