You may see this phrase in a denial letter, an insurance investigation, a repair report, or a lawyer's explanation of why a product failed even though its design looked fine on paper. A manufacturing defect means something went wrong while the product was being made, assembled, packaged, or inspected, so a particular item ended up more dangerous than it was supposed to be. The problem is not necessarily the overall blueprint. It is that this one tire, airbag, ladder, bottle, or car part came off the line flawed.

That difference matters when someone is hurt. A manufacturing defect claim usually focuses on how the product differed from other units of the same product and whether that flaw caused the injury. Evidence often includes the product itself, photos, recall notices, repair records, and expert review. If the item is thrown away or altered after the incident, proving the case can become much harder.

For an injury claim, a manufacturing defect can support a product liability case against a manufacturer, distributor, or seller, alongside theories like design defect or failure to warn. In Hawaii, fault can still affect recovery under the state's modified comparative fault rule, Hawaii Revised Statutes §663-31 (1986): if an injured person is more than 50% at fault, recovery is barred. That can matter if the defense argues the product was misused or altered before the accident.