From Junkyard to Joyride: How BMW's Car2Car Project Proves That Old Cars Can Become New Cars

The automotive industry has long grappled with a fundamental question: can the materials from end-of-life vehicles be recovered at sufficient quality to be reused in new cars? The BMW Group's Car2Car research project has now provided a resounding answer: yes. Through a comprehensive study spanning the entire value chain, the project has demonstrated that high-quality material loops are technically feasible on an industrial scale, with particularly significant progress made in steel, aluminium, and copper recovery.

The "Car2Car Rate": A New Benchmark for Automotive Recycling

At the heart of the project is a concept called the "Car2Car rate": the percentage of materials from an end-of-life vehicle that can, in principle, be recovered at high enough quality for reuse in new automotive applications. This goes beyond conventional recycling rates, which measure simply whether a material is recycled. The Car2Car rate demands that the material be returned to the automotive material loop with a comparable level of quality.

The findings were striking. Using methods currently standard in the market, the project achieved a Car2Car rate of just six percent across all five focus material groups during a vehicle recycling trial with minimal compulsory dismantling. But with the help of advanced process engineering and optimised processing routes, the rate climbed to 51 percent. Under these expanded processing and sorting conditions:

• Steel: from 1% to 81%

• Aluminium: from 23% to 52%

• Copper: from 48% to 68%

These figures represent a monumental leap in the potential for high-quality material loops in the automotive industry. The research demonstrates that the circular economy is not just an aspiration it is a technical possibility.

The Steel Breakthrough: Solving the Copper Contamination Problem

The project's key findings are perhaps best illustrated by the example of steel. Up until now, copper-bearing impurities from cables, connectors and other components have hindered the recycling of end-of-life vehicle scrap into high-quality automotive steels. The Car2Car project demonstrated that just one additional processing step sorting steel scrap to reduce copper contamination can substantially improve scrap quality. A patent application has been filed for this process.

The so-called steel coils produced using this method were integrated into industrial production following successful material and quality testing. In a field test conducted at BMW Group Plant Leipzig, more than 100,000 series parts were produced from recovered steel and installed in vehicles. The project thus demonstrated, along a real industrial value chain, that new vehicle components can be manufactured from end-of-life vehicles.

This is a watershed moment for automotive recycling. It proves that the vision of a closed material loop where old cars become new cars is within reach. However, for large-scale industrial implementation, scalable process chains, additional infrastructure, and viable business models are still needed.

Challenges Remain: Plastics and Glass Lag Behind

While the project confirmed the considerable potential for high-quality material loops, especially for metals, it also highlighted significant technological challenges for plastics and glass. The wide variety of materials, complex composite material structures, and stringent quality requirements make it difficult to produce high-quality recyclates for high-end automotive applications.

For plastics, in particular, it has become evident that precisely tailored process chains comprising various sorting and processing technologies will be needed in the future to consistently achieve the material quality necessary for automotive material loops. Unlike metals, which can be melted and refined, plastics degrade with each recycling cycle and often contain additives that complicate the recycling process.

From Research to Reality: The Industrial Field Test

The project's findings are not merely theoretical. The field test at BMW Group Plant Leipzig, which covered 433 vehicles from 60 different BMW Group models, including test vehicles that were less than five years old demonstrated that recovered steel can be used in series production. The successful production of more than 100,000 series parts provides tangible proof that the circular economy is technically feasible.

This industrial application represents a crucial step toward the large-scale implementation of high-quality material loops. It shows that with the right technologies and processes, the automotive industry can move from a linear "take-make-dispose" model to a circular economy where materials are kept in use for as long as possible.

A Broader Impact: Shaping the Future of Automotive Recycling

Beyond the BMW Group and the participating project partners, the Car2Car findings provide an important data basis for the further development of the entire automotive recycling landscape. In the context of future regulatory requirements, such as the European ELV Regulation, Car2Car illustrates which technological, economic, and structural conditions must be created to enable higher material recovery rates and closed material loops.

This includes:

• Innovation and investment in disassembly, sorting, and recycling technologies

• Increased digitalisation to enable better tracking and sorting of materials

• Framework conditions that promote transparency, quality, and the return of materials to European material loops

The project also highlights the importance of collaboration across the entire value chain. The consortium included partners from the automotive industry, materials manufacturing, the recycling industry, and academia including BMW AG, TU Bergakademie Freiberg, the Helmholtz Institute Freiberg for Resource Technology, Technical University of Munich, Scholz Recycling, thyssenkrupp Steel Europe, and others.

Looking Ahead: The Circular Economy as a Corporate Strategy

"The circular economy is an integral part of the BMW Group's corporate strategy," said Alexander Efthimiou, Senior Vice President Business Development at BMW Group. "Car2Car shows that its full potential can be realised when the entire value chain is optimised."

The findings from Car2Car will feed into the further development of the BMW Group's circular economy, confirming its established Design for Circularity approaches. They will also help design vehicles even more systematically for high-quality material loops.

However, the project's ultimate message is one of potential, not certainty. Whether this potential will be realised depends not only on technical feasibility, but also on factors such as access to end-of-life vehicles, favourable market conditions, investment, and viable business models throughout the entire recycling value chain.The automotive industry faces increasing pressure to reduce its environmental footprint. As the European Union moves toward stricter regulations on vehicle recycling, and as consumers become more environmentally conscious, the ability to demonstrate circularity is becoming a competitive advantage.

The Car2Car project provides a roadmap for how the industry can achieve this. It shows that with the right technologies, processes, and investments, the materials from end-of-life vehicles can be recovered and reused in new automotive applications reducing the need for virgin materials, lowering emissions, and creating a more sustainable industry.

The Car2Car research project represents a significant milestone in the journey toward a circular automotive industry. By demonstrating that high-quality material loops are technically feasible on an industrial scale, the BMW Group and its partners have shown that the vision of a closed material loop is within reach.

The path forward is not without challenges. Investments are needed in recycling infrastructure, and further development is required for plastics and glass. But the project's findings are a clear signal that the circular economy is not just an aspiration; it is an achievable goal.

As the automotive industry continues to evolve, the lessons from Car2Car will be essential in shaping a more sustainable future. The circus of automotive manufacturing is always evolving. And with projects like Car2Car, the show is just getting started.

The circus of automotive manufacturing is always evolving. And with projects like Car2Car, the show is just getting started.