A household appliance shocks you during normal use. A supplement causes severe reactions despite proper dosage. The product may appear normal even though it caused an injury. Hidden defects often leave people questioning whether they have legal grounds to pursue compensation when no crack, dent or flaw appears on the surface.
How can you prove a hidden product defect?
California’s strict product liability law generally recognizes three main types of defects: design defects, manufacturing defects and warning defects. A defect does not necessarily produce visible damage. Courts use different legal tests based on the type of defect.
Evidence may include:
- Design defects: A product may be considered defective when it does not provide the level of safety an ordinary consumer would reasonably expect during normal use. California law also recognizes a risk-benefit approach, which examines whether the benefits of a product’s design justify the risks it creates.
- Manufacturing defects: Evidence may show that the product differed from its intended design or specifications.
- Inadequate warnings: Missing or insufficient warnings may support a product liability claim under a different legal standard.
- Medical records: Medical records can document the injury and may provide evidence relevant to whether the product caused or contributed to the harm.
- Expert analysis: Depending on the product and the nature of the alleged defect, a qualified professional may be able to identify an internal failure or other condition that is not visible.
- Product testing: Testing may reveal a defect or internal failure that caused the injury.
The alleged defect theory affects which legal test and what evidence may be relevant.
What records strengthen your claim
Preserve the product exactly as it was when the injury occurred. Photos, purchase receipts and packaging materials create a factual timeline. Witness statements from anyone present can corroborate the circumstances of the incident, including how the product was being used at the time.
Detailed medical records should document your symptoms, treatment and any ongoing complications. Detailed records help show the nature of the injury and its link to the product, two key elements in a product liability case. Keep a written log of how the injury affects your daily life, work capacity and overall well-being.
What to do after an injury involving a hidden defect
A hidden product defect can make a case hard to prove. Preserving the product, recording the injury and getting expert help can show how the defect caused the harm.
California generally allows two years to file a personal injury claim under Code of Civil Procedure §335.1. Other claims may have different deadlines. The discovery rule may also extend the deadline in limited cases. An attorney can assess the claim, identify possible defects and determine which parties may be responsible.