A physical part needs a product-level explanation
A tangible component can raise liability questions when its condition or behaviour contributes to an unsafe finished product. Examples include a battery cell, valve, fastener, protective casing or batch of raw material. Directive (EU) 2024/2853 recognises components alongside finished products, but an investigation must explain what the particular part did and how that affected safety. The fact that the broken item came from an external supplier is only the beginning.
The component and supply-chain liability framework separates the part, its integration, the responsible actors and the damage. For physical components, the distinctive challenge is often preserving material evidence without losing the connection to manufacturing and assembly records. A photograph of a fracture may show the result of an incident rather than its initiating cause. Identify which conclusions depend on inspection, testing or inference.
Preserve the supplied state and the installed state
Record the manufacturer's part number, supplier reference, revision and any batch or serial identifiers. These describe different relationships: an internal stock code may group parts from several factories, while a supplier batch can appear in multiple finished-product models. Preserve labels and packaging where available. Record whether the component was original, replaced during servicing or taken from another product.
Installation can change a component's condition. Tightening a fastener, soldering a connection, curing an adhesive or trimming a seal may affect performance. The relevant inquiry compares what was supplied with what was fitted and how it was used. Assembly instructions, operator settings and acceptance records can help distinguish a supplied manufacturing fault from damage introduced during handling or integration. Missing documentation should be identified explicitly rather than filled by assumption.
Separate material failure from design mismatch
A material can fail because it departed from specification, because the specification was unsuitable or because the finished product exposed it to conditions outside the intended range. These explanations point towards different evidence. A seal with the wrong composition raises a different question from a correctly manufactured seal selected for an incompatible fluid. Both can produce the same visible leak.
Article 7 requires consideration of all relevant circumstances, including characteristics, instructions and foreseeable interactions. Passing a purchase specification does not conclusively establish that the finished product provided the required safety. Conversely, the failure of an assembly does not prove that every fitted part was defective. Investigators should state the proposed mechanism, the observations supporting it and realistic alternatives still requiring examination.
Testing should preserve the evidential chain
Before dismantling or destructive examination, record the condition and arrangement of relevant parts. Document who handled each item and what was changed. Where a test consumes a sample, preserve the method, measurements and photographs so another reader can understand what was tested. A result is less useful if the tested item cannot be linked reliably to the affected product or supplier batch.
Comparison samples also require context. An unused part from a different revision may behave differently for legitimate reasons. A recovered part may have experienced heat or impact during the incident. Compare like with like where possible and explain remaining differences. The guide to supplier testing records addresses how sample choice, test conditions and acceptance criteria affect the strength of a supplier's report.
Map component and finished-product responsibility
Article 8(1)(b) addresses a defective component integrated or interconnected within manufacturer control that caused the product to be defective. The finished-product manufacturer's potential liability remains relevant. A component supplier does not become the sole responsible actor merely because a failure was located in its part. Selection, integration, instructions and safeguards may also explain the unsafe result.
Article 11(1)(f) provides a component-specific exemption where the manufacturer proves that the finished product's defectiveness is attributable to that product's design or the manufacturer's instructions to the component manufacturer. The evidence must support that explanation. A contract calling the integrator responsible for design does not, by itself, establish the actual cause or extinguish an injured person's rights under the Directive.
Distinguish a component loss from other damage
Article 6 excludes the defective product itself and specifies an exclusion for a product damaged by a defective component integrated or interconnected by its manufacturer or within its control. A damaged assembly should therefore not be treated automatically as compensable property damage under this Directive. Personal injury, damage to other qualifying property and qualifying data damage require their own assessment.
A failed battery can illustrate the distinction. Replacement of the battery, damage to the appliance containing it and injury to a person are separate losses. The technical cause may overlap, but their legal classification can differ. Other contractual or national liability routes may need separate examination. Describing each loss precisely prevents the physical investigation from implying a compensation outcome it cannot establish.
Use chronology to define the investigation
The corrected Directive scope concerns products placed on the market or put into service after 8 December 2026. Record the component supply history, finished-product market history and any replacement events separately. An incident after that date does not alone select the new framework. Applying the chronology to an individual product also requires review of the relevant national rules.
A useful tangible-component report connects identification, supplied condition, installation, failure mechanism, safety effect and resulting damage. It records uncertainty where physical evidence has been destroyed or mixed. The report should enable a reader to see why the proposed component explanation is stronger or weaker than an integration explanation, without turning a broken part into an automatic finding of liability.
Records that help the review
Use the following as a practical starting point. Select and preserve records appropriate to the product, incident and applicable procedure.
- Part revision and supplier batch
- As-received and installed condition records
- Assembly settings and physical examination results
Independent educational information at EU Directive level. National implementing law and procedure require separate review.
Primary sources and legal scope
This page explains the EU Directive framework. Check national implementing law, the corrected temporal scope and relevant procedure before applying it to a case.
- Directive (EU) 2024/2853, consolidated text: Articles 2, 4, 6, 7, 8, 11 ↗
- Official Journal corrigendum, 7 May 2026: Article 2(1) ↗
Source register: corrected scope verified 16 October 2026. Article references identify the legal basis. No qualified legal review or national implementation status is claimed.