When you get behind the wheel, you trust that every component in your vehicle will perform as intended. That trust becomes a matter of life and death when it comes to the safety systems designed to protect you in a crash. A defective airbag does not just fail to help you; it can actively kill you. This makes defective airbags one of the most clear-cut examples of product liability in the automotive world, and understanding how the law treats these failures is crucial for anyone who has been injured.

Product liability law holds manufacturers, distributors, and retailers responsible for putting unsafe products into the hands of consumers. In the context of car parts, this means that if a part is unreasonably dangerous because of a defect, the company that made or sold it can be held financially liable for the injuries it causes. The key principle is that you should not have to prove the company was negligent or careless. In many product liability cases, the law focuses on the product itself, not the manufacturer’s behavior. This is called strict liability. If the product is defective and that defect caused your injury, the manufacturer is on the hook.

Defective car parts usually fall into three categories. The first is a manufacturing defect. This happens when a part comes off the assembly line different from all the others. One batch of airbag inflators might have an improperly mixed propellant, causing them to explode with too much force and send metal shrapnel into the passenger cabin. The second is a design defect. This means the product was made exactly as planned, but the plan itself was inherently dangerous. A seatbelt buckle designed so that a hard sideways impact can unlatch it is a design defect. The third is a failure to warn. A car part may be perfectly made and reasonably designed, but if the manufacturer does not provide adequate instructions or warnings about a danger you cannot see, they can still be liable. For example, a tire manufacturer knows that driving over a certain speed in hot weather can cause a blowout in one of their models, but they fail to print that warning on the tire sidewall.

Airbag failures specifically highlight all three of these categories. The most infamous example in recent history involves airbag inflators that used ammonium nitrate as a propellant. When exposed to high humidity and temperature cycling over years, the chemical degraded. The result was that the inflator could explode with excessive force, rupturing the metal canister and firing hot metal fragments into the vehicle. This is a manufacturing defect issue because the chemical composition was unstable in a way the manufacturer should have caught. It is also a design defect issue because the choice of that particular propellant for that specific design was a known risk that was not adequately addressed. And it was a failure to warn issue because the automaker and the parts supplier continued to sell cars for years without notifying the public about the specific conditions that made the inflator dangerous.

For a plaintiff—the person injured—winning a defective car part case comes down to proof. You have to show that you were using the product in a reasonably foreseeable way. If you were driving the car normally and the airbag exploded in your face, that is a foreseeable use. You also have to show that the product was defective when it left the manufacturer’s control. This is often the hardest part because it requires expert testimony and evidence. Finally, you must prove that the defect directly caused your injury. If you were already severely injured from the crash itself, and the defective airbag added to the damage, the manufacturer is still responsible for the additional harm.

The manufacturer will often try to argue that you misused the product or that you assumed the risk. They might say you were not wearing your seatbelt properly, or that you modified the vehicle in a way that caused the airbag to malfunction. These defenses are common, but they are not automatic get-out-of-jail-free cards. A court will examine whether your actions were truly unreasonable and whether they were the actual cause of the injury. A manufacturer cannot escape liability simply because you were speeding or failed to maintain the car, unless that specific behavior was the direct and proximate cause of the defect’s activation.

The end result of a successful product liability case for a defective car part can include compensation for medical bills, lost wages, pain and suffering, and in extreme cases, punitive damages designed to punish the manufacturer for egregious misconduct. These cases are rarely simple, but the legal foundation is straightforward: when a company puts a dangerous part on the road, and that part hurts you, the company pays. Your job is to prove the part was defective, and they are responsible for the rest.