How Louisiana Law Treats Claims Involving Defective Cars and Parts

It started as a routine morning commute from Westlake to the Port of Lake Charles. The driver hit the brakes on I-10 heading east, felt the pedal go soft, and the car drifted through a red light and into the intersection before stopping. No collision that day. A mechanic found a brake master cylinder that had failed internally, a defect later tied to a batch of units from the same supplier. The question that followed was not about the driver's reaction time. It was about who built the part and what they knew.

Louisiana has a specific statute for these situations: the Louisiana Products Liability Act, La. R.S. 9:2800.51 through 9:2800.60. It is the exclusive civil law remedy against a manufacturer when that manufacturer's product injures someone in Louisiana. For drivers and passengers hurt because a car or one of its components failed, the LPLA determines who you can sue, what you must prove, and how the case is structured. This article explains how that law works in practice.

The Louisiana Products Liability Act: The Exclusive Framework

Before 1988, Louisiana had a patchwork of tort theories for product injuries. The LPLA replaced that patchwork with a single, unified statute. That matters for one reason above all others: you cannot sue a manufacturer for a defective vehicle outside the LPLA. If you try to bring a general negligence claim under Civil Code Article 2315 against the car's manufacturer, Louisiana courts will redirect you to the LPLA. It is exclusive.

The statute defines a "manufacturer" broadly. It covers the company that assembled the final vehicle, but it also covers manufacturers of component parts that were incorporated into the finished car. So if the airbag inflator was made by one company, the airbag module by a second, and the car assembled by a third, all three may qualify as manufacturers under the LPLA depending on the specific defect at issue.

Sellers and distributors who did not manufacture anything are generally outside the LPLA. A Calcasieu Parish dealership that simply sold you the car from inventory is not typically a LPLA defendant. That changes if the dealership performed a repair, was responsible for a recall service, or had independent knowledge of the defect before the sale.

The Four Theories of Liability Under the LPLA

To recover under the LPLA, you prove the product was "unreasonably dangerous" under at least one of four specific theories. These are not interchangeable. Each requires different evidence and different expert testimony.

We explain how fault percentages and deadlines work after a Louisiana injury in our 2026 Tort Reform Survival Guide.

Construction or composition defect. The product deviated from its intended design. The manufacturer designed a brake caliper to a certain specification, but this particular caliper came out of the factory with a machining error, a bad seal, or a substandard material substitution. The defect exists in one unit or a batch, not in the overall design. You prove this by comparing the failed part to the manufacturer's own specifications and showing where it went wrong.

Design defect. The design itself is the problem. Every unit built to that design has the same flaw. An airbag threshold set too high so the bag does not deploy in moderate-speed impacts. A fuel tank positioned where rear-end collisions rupture it. A rollover protection system that collapses at the wrong load. Design defect claims require showing there was a reasonable alternative design the manufacturer could have used that would have prevented or reduced the risk, and that the risk-utility balance tilted toward using that design.

Failure to warn. The product poses a danger that is not obvious to the ordinary user, and the manufacturer did not provide adequate warning. A tire that loses integrity above certain inflation pressures needs to say so clearly. A towing package with a specific tongue weight limit that is not labeled creates a warning failure. This theory applies where the product itself might be acceptable but the user needs information they were not given to use it safely.

Non-conformity with express warranty. The manufacturer made a specific promise about the product's performance and the product failed to meet that promise. A warranty that a tire is rated for certain loads, a dealer representation about structural integrity, or a recall completion certification that turns out to be false. These create warranty-based liability separate from the defect theories above.

What You Must Prove: The Elements

Under the LPLA, the plaintiff (the person suing) must prove four things. The product was unreasonably dangerous, under at least one of the four theories. The product was in the manufacturer's control at the time the characteristic that made it unreasonably dangerous existed. The unreasonably dangerous characteristic caused the claimant's damage. And the claimant's damage arose from a reasonably anticipated use of the product.

That last element matters more than people expect. Reasonably anticipated use does not mean intended use. Driving a pickup truck at 80 mph on the interstate may not be the speed it was "intended" for, but it is reasonably anticipated. Towing a trailer within the posted weight rating is a reasonably anticipated use. But modifying the vehicle's steering, disabling safety systems, or racing it on a closed track may put you outside the protection of the statute.

Causation also requires expert testimony in almost every vehicle defect case. The manufacturer will hire an automotive engineer to explain why the failure was normal wear, driver misuse, or a post-manufacture modification. You need your own engineer with equal credentials to rebut that. Lake Charles plaintiff's attorneys with LPLA experience keep relationships with those experts. General practitioners often do not.

Recalls, TSBs, and What They Mean for Your Claim

A recall is a formal admission by the manufacturer (often compelled by NHTSA) that a specific component poses an unreasonable safety risk. If your car had an open, unperformed recall on the part that failed and the crash happened because of that part, you have a strong head start on an LPLA design or construction defect claim. You still need to connect the specific recall to the specific failure, but the manufacturer's own documents do most of the work.

Technical Service Bulletins are different. TSBs are not public safety recalls. They are manufacturer instructions to dealerships about how to fix known problems, often quietly, before they generate enough complaints to trigger a formal recall investigation. A TSB that describes your exact failure mode predates your crash and shows the manufacturer had knowledge of the defect before you were hurt. That is relevant to a design defect claim and sometimes to punitive damages arguments.

Search your VIN at nhtsa.gov. Pull every recall and every available TSB. Your attorney can also issue a litigation hold letter demanding the manufacturer produce all internal communications about the relevant component, including warranty claim data, field reports, and TSB drafting history.

How Louisiana's 51% Fault Rule Applies to Vehicle Defect Cases

Louisiana Civil Code Article 2323 uses a modified comparative fault system. If you are more than 50% at fault, you recover zero. If you are 50% or less at fault, you recover your damages reduced by your percentage.

In vehicle defect cases, manufacturers argue driver fault aggressively. Speeding before the tire failure. Overloading the truck before the axle gave out. Ignoring a dashboard warning light before the brake failure. Each argument is an attempt to raise your fault percentage above 50%.

Here is the arithmetic on a real case. Suppose your damages total $500,000: $120,000 in medical bills at Lake Charles Memorial Hospital, $80,000 in lost wages from your job at the Sasol Lake Charles Chemical Complex, and $300,000 in pain and suffering from a permanent knee injury. If the jury assigns 25% fault to you and 75% to the manufacturer, you receive $375,000. If they push you to 40%, you receive $300,000. At 51%, you receive nothing at all.

This is why the evidence from the first 72 hours matters so much. The event data recorder, the preserved failed component, and an expert who can testify to the specific mechanical failure rather than driver error are what keep your fault percentage below the bar.

Frequently Asked Questions

Does Louisiana have strict liability for defective cars?

Louisiana does not apply common-law strict liability. The LPLA provides the exclusive framework and requires showing the product was unreasonably dangerous under one of the four defined theories. You do not have to prove the manufacturer was careless in the traditional negligence sense, but you do have to prove the product had a specific defect and that defect caused your injury. The statute is structured rather than open-ended.

Can I sue a car dealership for selling me a defective vehicle?

The LPLA generally does not reach dealerships that simply sold a car they did not manufacture. However, if the dealership performed a negligent repair, failed to complete a recall service, or knowingly sold a car with a defect they were aware of, a separate negligence claim under Civil Code Article 2315 may apply. These are different legal theories with different elements, so the analysis depends on what the dealership specifically did or failed to do.

What does 'unreasonably dangerous' mean under the Louisiana LPLA?

The LPLA defines it through four theories: the product deviated from its design specs (construction defect), the design itself creates risk that a reasonable alternative design would have prevented (design defect), the manufacturer failed to warn of a non-obvious risk (failure to warn), or the product did not live up to an express warranty. You must fit your facts into at least one of those four boxes. A general argument that the car was unsafe is not enough.

How does comparative fault work when both the driver and a defective part contributed to the crash?

A jury assigns fault percentages to all parties, including the manufacturer and the driver. Your recovery is reduced by your own percentage and eliminated entirely if it exceeds 50%. Manufacturers routinely argue driver behavior contributed, so preserving the event data recorder and securing a qualified automotive engineer to testify about the mechanical failure are the main tools for keeping your fault assignment low.

Can I bring an LPLA claim for an aftermarket part that failed?

Yes. Aftermarket part manufacturers are subject to the LPLA just like original equipment manufacturers. If an aftermarket tire, brake pad, or suspension component fails and causes a crash, you can sue that manufacturer under the same four theories. The analysis is identical: show the part was unreasonably dangerous and that the defect caused your injury during a reasonably anticipated use.

Legal Disclaimer: This article is for general information only and is not legal advice. Louisiana vehicle defect and product liability law has a lot of moving parts, and the facts of every case are different. Statutes, regulations, and case law also change over time. Reading this does not create an attorney-client relationship. If you were injured in a crash involving a defective car or auto part in Lake Charles or Calcasieu Parish, talk to a licensed Louisiana personal injury attorney as soon as you can. The one-year prescriptive period for personal injury claims is strictly enforced.