Can You Really Call It Sustainable If You Cannot Repair It?
A product’s sustainability is not determined only by what goes into it, but by how long it can remain useful. Repairability is an engineering decision—with consequences for resource consumption, product lifetime, circularity and long-term value.
10/19/20268 min read
Can You Really Call It Sustainable If You Cannot Repair It?
A product’s sustainability is not determined only by what goes into it, but by how long it can remain useful.
Repairability is an engineering decision—with consequences for resource consumption, product lifetime, circularity and long-term value.
A product can use fewer materials, consume less energy during manufacturing and contain recycled components—and still be a poor sustainability solution.
How?
Because when something breaks, it cannot be repaired.
A failed component may require replacing an entire assembly. A damaged part may be permanently bonded to the rest of the product. A relatively minor fault may make a product uneconomical to fix. Spare parts may no longer be available, or accessing them may require specialist tools, proprietary software or extensive disassembly.
The result is a product that becomes waste before its useful life has truly ended.
This raises an important question for engineers, product designers and sustainability professionals:
Is a product sustainable because it uses less material—or because it stays useful for twice as long?
The answer is not always straightforward. But it reveals something fundamental about sustainable product design: material efficiency is only part of the equation. The ability to maintain, repair, upgrade and continue using a product can be just as important.
1. The hidden sustainability cost of products that cannot be repaired
When assessing a product’s environmental performance, companies often focus on measurable characteristics such as material composition, manufacturing energy, recycled content or carbon footprint.
These indicators matter. However, they do not tell the whole story.
Imagine two products with similar functions. Product A uses slightly less material but becomes unusable after a component fails. Product B requires a little more material upfront, but its components can be replaced and the product can continue operating for years.
Which product has the lower environmental impact?
It depends on the materials, energy use, repair frequency, replacement parts, transport, product performance and actual service life. But Product B may have a significant advantage if repairing it avoids manufacturing and purchasing an entire replacement.
This is the lifecycle perspective that sustainable engineering needs to apply.
A product should not be assessed only by the resources consumed when it is manufactured. It should also be assessed by the resources required to keep it functioning throughout its useful life—and the consequences when it can no longer be used.
A product that is efficient to manufacture but difficult to maintain may simply transfer its environmental burden into the future.
Repairability is therefore not an isolated product feature. It is a design characteristic that can influence resource efficiency, waste generation, lifecycle costs and circularity.
2. Repairability starts with product architecture
Whether a product can be repaired is often decided long before it reaches the market.
It is shaped by the architecture of the product: how components are arranged, how they connect, which parts can be accessed and whether individual elements can be replaced without damaging the rest of the system.
Consider a component that is expected to wear out before the rest of the product. If it is easy to remove and replace, its failure does not necessarily end the product’s useful life. If it is permanently integrated into a complex assembly, the same failure may require replacing much more than the component itself.
This is where engineering decisions become critical.
Modularity: making replacement possible
Modular design can allow components to be replaced, upgraded or maintained independently of the wider product.
But modularity should not be treated as an automatic sustainability benefit. Additional interfaces, connectors, housings or fasteners may introduce material use, complexity or potential failure points.
The engineering question is not simply whether a product is modular.
It is whether the architecture makes the right components accessible and replaceable while maintaining safety, performance, durability and cost-effectiveness.
Disassembly: designing for access
A product may technically be repairable but practically impossible to repair at a reasonable cost.
If accessing a failed component requires dismantling most of the product, removing several undamaged parts or using specialised equipment, repair may become unattractive.
Designing for disassembly means considering how products can be opened, inspected and reassembled without unnecessary damage or effort.
The type of fasteners, the use of adhesives, component positioning and the sequence of disassembly can all affect whether repair is realistic.
These details may seem minor during design. Over the product’s lifetime, they can determine whether a repair takes minutes, hours or becomes commercially impractical.
3. Spare parts are part of the sustainability strategy
A repairable design is of limited value if the necessary spare parts are unavailable.
A company may design a product with replaceable components, but if those components are discontinued too early, expensive to obtain or available only through a restricted service network, the practical benefits of repair are reduced.
This creates a challenge that extends beyond product engineering.
Repairability depends on decisions across the value chain, including:
Component availability: Which parts are likely to fail, and for how long should replacements remain available?
Standardisation: Can common components be used across product families to simplify maintenance and supply?
Supplier strategy: Are critical parts dependent on a single supplier or a short-lived sourcing arrangement?
Technical information: Can authorised repairers access the documentation, diagnostic information and instructions needed to perform repairs safely?
Service economics: Can parts and labour be provided at a cost that makes repair a realistic alternative to replacement?
These questions connect product design with procurement, operations, after-sales service and business-model decisions.
A company cannot treat repairability as a purely technical property while ignoring the systems needed to support it.
A repair strategy needs both a repairable product and a viable repair ecosystem.
4. Material selection can make or break repairability
Material selection is another important part of the equation.
Materials influence durability, wear, corrosion, fatigue, thermal behaviour, compatibility between components and the methods available for joining or separating them.
For example, a design that combines multiple materials through permanent bonding may create challenges when one component needs to be replaced or when materials must eventually be separated for recovery.
A different joining method might improve disassembly—but could also affect strength, sealing, weight, manufacturing cost or product safety.
Likewise, selecting a highly durable material does not automatically make the whole product durable. If another component fails prematurely and cannot be replaced, the product may still be discarded.
The important distinction is between material performance and system performance.
A material should not be evaluated only on its individual environmental profile. Engineers also need to consider how it behaves within the product architecture, how it affects maintenance and whether it supports the intended service life.
This is consistent with a lifecycle-based approach to Safe and Sustainable by Design (SSbD): evaluating safety and sustainability together, considering relevant trade-offs and bringing those considerations into decisions while design alternatives are still available.
5. Longer product life can create value—but only when the system supports it
Repairability can offer environmental and economic benefits, but these benefits are not guaranteed.
A repair may require energy-intensive replacement components, long-distance transport or materials with significant environmental impacts. A product may also become obsolete because it no longer meets performance, safety or functional requirements, even if it remains physically repairable.
The goal should therefore not be to maximise product lifetime at any cost.
It should be to extend useful life where doing so creates a genuine overall benefit.
That requires engineers and decision-makers to assess several factors together:
Expected product lifetime and likely failure modes.
The environmental impact of manufacturing replacement components.
Repair costs compared with replacement costs.
The availability of spare parts and qualified repair services.
Product upgrades, changing user requirements and technological obsolescence.
The implications for safety, reliability, performance and end-of-life recovery.
The right decision may be to repair, refurbish, upgrade, remanufacture or replace a product. The important point is that the choice should be based on the performance of the whole system—not on a single sustainability indicator.
This is also where lifecycle assessment (LCA) and techno-economic assessment (TEA) can support better engineering decisions. They help examine whether extending a product’s life is likely to reduce environmental impacts, improve economic value, or both, under realistic assumptions.
6. Repairability is becoming a regulatory and market consideration
Repairability is no longer only a voluntary design ambition.
The European Union’s Directive on common rules promoting the repair of goods (Directive (EU) 2024/1799) has applied from 31 July 2026, following national transposition. For products covered by relevant EU repairability requirements, it establishes an obligation for manufacturers to repair certain goods under specified conditions and includes measures concerning spare parts, repair information and access to repair services. Its scope is linked to product categories covered by the relevant EU legislation; it does not create an identical repair obligation for every product.
The Ecodesign for Sustainable Products Regulation also provides a framework for product sustainability requirements, including measures intended to promote durability, repairability and resource efficiency. Implementation is progressing through product-specific priorities and requirements.
For engineering and R&D teams, the practical message is clear: repairability should be considered early enough to influence product architecture, component selection, documentation and supply-chain planning.
Waiting until a design is complete may leave companies with fewer options and higher redesign costs.
Regulatory compliance is only one part of the business case. Products that are easier to maintain and repair may also support customer satisfaction, service revenue, longer customer relationships and more circular business models.
The opportunity is to treat repairability as a source of design and commercial value—not merely as a requirement to address later.
7. Five questions every engineering team should ask
Before calling a product sustainable, teams should test whether its design supports a useful life that is realistic, maintainable and economically viable.
1. What is most likely to fail first?
Identify components exposed to wear, fatigue, corrosion, damage or technological obsolescence. Are they accessible and replaceable?
2. Can a component be replaced without sacrificing the whole product?
Assess the disassembly sequence, joining methods, interfaces and risk of damaging surrounding components during repair.
3. Will spare parts and technical information be available?
Consider parts availability, supplier dependencies, repair instructions, diagnostics and the ability of qualified repairers to carry out work safely.
4. Does the material and component strategy support long-term use?
Evaluate durability, compatibility, repair methods, upgrade potential and eventual material recovery together.
5. Does repair create a real lifecycle and economic benefit?
Compare repair, replacement and other options using realistic assumptions about performance, environmental impact, cost, logistics and expected service life.
These questions should not be left to a final sustainability review. They belong in the engineering decisions that shape the product from the beginning.
8. Repairability is a design decision, not an afterthought
A product’s environmental performance is shaped by much more than the resources used to manufacture it.
It is also shaped by what happens when a component fails, when maintenance becomes necessary, when a product needs an upgrade and when its original owner no longer needs it.
If a product cannot be repaired, its useful life may be determined by its weakest inaccessible component rather than by the quality of its overall design.
That is why repairability should be considered alongside material efficiency, durability, safety, lifecycle impacts and circularity.
The objective is not to make every product repairable in the same way. It is to understand which repair strategies make technical, environmental and economic sense for the specific product and its operating context.
For some products, modularity will be central. For others, accessible wear components, robust materials, standardised parts or effective maintenance systems may matter more.
The right answer comes from understanding the whole system—and making those decisions before the design becomes difficult to change.
How Abaeco Consultants can help
At Abaeco Consultants, we help engineering and R&D teams integrate sustainability, safety and lifecycle thinking into product and process decisions.
Through our SSbD Design Review, we help organisations examine design choices that may create long-term environmental impacts, operational constraints, regulatory exposure or avoidable resource use.
This can include reviewing material selection, product architecture, component accessibility, durability, repairability and the trade-offs between performance, safety, cost and circularity.
The objective is to identify critical design issues while alternatives remain available—and translate sustainability ambitions into practical engineering recommendations.
Because a product should not be considered sustainable simply because it was designed efficiently.
It should be designed to deliver value throughout its useful life.
The real question is not only how efficiently we can manufacture a product. It is how long we can keep it useful—and what it takes to do so.