Different rules have developed in products liability law for those who sell or repair used products. In most instances, a person who repairs, rebuilds, or reconditions a product is liable if the person is negligent in treating the product, but the person is not subject to strict liability for defects. In some instances, however, a person who remanufactures a product may be subject to the same products liability rules as the original manufacturer.
States are split regarding the bases of liability of sellers of used products. Some states expressly exclude sales of used products from products liability rules. In other states, the general products liability rules apply.