German Product Liability Law

German product liability law operates on two levels: the delictual liability of producers under the general tort law of the Bürgerliches Gesetzbuch (BGB), developed by the courts as the doctrine of Produzentenhaftung (producer liability), and the strict liability regime enacted to implement the European Product Liability Directive 85/374/EEC, codified in the Produkthaftungsgesetz (ProdHaftG). The interaction between these two regimes creates a comprehensive system of producer responsibility that balances the interests of injured consumers with the economic interests of producers. The German approach to product liability is characterised by a sophisticated allocation of the burden of proof, extensive duties of care, and a wide range of protected interests.

The Foundations of Producer Liability: Section 823 BGB

Product liability under the BGB is based on section 823(1) BGB, which imposes liability on a person who, intentionally or negligently, unlawfully injures another’s life, body, health, freedom, property, or other right. The Federal Court of Justice developed the doctrine of Produzentenhaftung in a series of decisions beginning in the 1960s, establishing that the producer of a defective product owes a duty of care to the ultimate consumer, even in the absence of contractual privity. The producer’s duty extends to the design, manufacture, and instruction of the product. The producer must ensure that the product is designed to avoid unreasonable risks, that the manufacturing process is adequately supervised to prevent defects, and that users are warned of any dangers that cannot be eliminated through design. Liability under section 823(1) BGB requires proof of fault (Verschulden), but the courts have reversed the burden of proof, requiring the producer to prove that it was not at fault.

The Hühnerpest Decision

The landmark Hühnerpest (Fowl Pest) decision of the Federal Court of Justice in 1968 (BGHZ 51, 91) established the foundational principles of German product liability law. The case concerned a poultry farmer who lost his entire flock after using a contaminated vaccine. The court held that the producer bears the burden of proving that it was not at fault for the defect. This reversal of the burden of proof (Beweislastumkehr) is justified by the fact that the producer controls the production process and has access to the information necessary to establish whether the defect was caused by its fault. The consumer, by contrast, has no access to the production process and cannot reasonably be expected to prove specific acts of negligence. The court established a threefold classification of producer duties: design duty (Konstruktionspflicht), production duty (Fabrikationspflicht), and instruction duty (Instruktionspflicht). The Hühnerpest decision also established the producer’s duty to monitor the product after it has been placed on the market (Produktbeobachtungspflicht) and to warn consumers of newly discovered risks.

The Burden of Proof Reversal

The reversal of the burden of proof in product liability cases applies to all three categories of producer duty. In design defect cases, the producer must prove that the design was reasonably safe and that no safer alternative design was available at the time of production. The standard is not absolute safety but the state of scientific and technical knowledge at the time the product was designed. In manufacturing defect cases, the producer must prove that it exercised reasonable care in the production process, including adequate quality control measures. A single defective product that emerges from a properly designed production process creates a presumption that the producer was negligent. In instruction defect cases, the producer must prove that the warnings and instructions provided were adequate to inform users of the risks. The producer must also prove that it fulfilled its post-market duties, including monitoring the product for newly discovered risks and taking appropriate action, including recall if necessary. The burden of proof reversal has made German product liability law particularly protective of consumer interests.

Post-Market Duties and Product Recall

The Federal Court of Justice has developed extensive post-market duties (Produktbeobachtungspflicht) that continue after the product has been placed on the market. The producer must monitor the product in use to identify risks that were not apparent at the time of manufacture. Where a previously unknown risk is discovered, the producer must take appropriate action: warning consumers of the risk, instructing them on how to avoid it, or, in serious cases, recalling the product from the market. The duty to recall arises where the product poses a serious risk to life or health and a warning would be insufficient to protect consumers. The producer who fails to recall a dangerous product may be liable for all resulting injuries. The post-market duties apply not only to the original producer but also to distributors and importers who are in a position to monitor the product and take corrective action. The duty to recall has been extended to cases where the producer has gone out of business or cannot be identified, with liability falling on the distributor in such cases.

The Produkthaftungsgesetz (ProdHaftG)

The Produkthaftungsgesetz (Product Liability Act) of 1989 implemented the European Product Liability Directive 85/374/EEC. The ProdHaftG establishes a regime of strict liability for defective products, eliminating the requirement to prove fault. The producer is liable for damage caused by a defect in the product, defined as a failure to provide the safety that a person is entitled to expect, having regard to all circumstances including the presentation of the product, the expected use, and the time when the product was placed on the market. The ProdHaftG applies to movable products and covers personal injury and property damage to privately used property. Liability is subject to a ceiling and to certain defences, including the state of the art defence (Entwicklungsrisiko): the producer is not liable if the state of scientific and technical knowledge at the time of placing the product on the market was not such as to enable the discovery of the defect. The ProdHaftG does not replace the BGB’s delictual liability but supplements it, and claimants may choose to bring claims under either regime.

The Relationship Between the Two Regimes

The coexistence of the BGB’s fault-based liability and the ProdHaftG’s strict liability creates a complex system in which claimants may choose the most advantageous legal basis. The ProdHaftG is advantageous because it does not require proof of fault, but its scope is limited in several respects. It does not cover damage to business property or pure economic loss. It applies a ceiling of 85 million euros for personal injury claims. It does not cover pain and suffering (Schmerzensgeld), which can only be claimed under the BGB. The BGB’s delictual liability, by contrast, covers all forms of damage, including pain and suffering, but requires proof of fault. The claimant may bring a claim under both regimes and may recover damages under whichever basis is more favourable for each element of loss. The Federal Court of Justice has held that the burden of proof reversal under the Hühnerpest doctrine applies even where the claim is brought under the ProdHaftG, maintaining the protective character of German product liability law. The dual system ensures comprehensive protection for injured consumers while providing producers with clear standards of liability.