"The industrialization of all the assembly, of all the components, is sophisticated and high tech and needs time," Post told Automotive News at a media event in Palm Springs, Calif., this week. "We are focused on that, but it will be tough."

Last month BMW announced a $1.7 billion investment to build at least six battery-powered models at its plant in Greer, S.C., by 2030. The project includes domestic sourcing of next-generation batteries and construction of a $700 million battery-pack assembly plant in nearby Woodruff, S.C.

Post and his team must help the suppliers for BMW's combustion engine vehicles adapt their businesses to provide as many EV components as possible. Using the existing supplier base is essential because those companies have the know-how, said Post, who has a doctorate in mechanical engineering.

"It's not a big issue to bring them to transformation," he said. Combustion engine parts suppliers can repurpose a factory to produce housings and bearings for electric motors, while suppliers working on engine cooling can adapt their know-how to cooling batteries.

EVs will stress existing pressure points on an already strained supply chain.

For example, the new generation of high-tech vehicles is driving additional demand for scarce semiconductor chips. EVs require up to 30 percent more chips than combustion engine vehicles to power battery management systems and electric motor controls, Post noted.

Another supply chain challenge involves sourcing scarce raw materials such as lithium and cobalt for EV batteries. Post said he expects this raw material situation to be "tough until 2030 at least."

With mining operations requiring long lead times due to environmental and governmental regulations, automakers such as BMW and Mercedes are directly signing long-term contracts with mining companies to source raw materials on behalf of their battery cell suppliers. But recycling these raw materials will be vital in helping supply meet the new EV-fueled demand.

"We are in contracts with cell suppliers to use recycled material," Post said. "Our target is to reuse 90 percent of the raw materials in the battery."

Regionalization of critical components and raw materials "helps us to be more resilient to global impacts," Post said. But it's not feasible yet to source 100 percent local content. The Spartanburg plant's EV supply chain will extend well beyond South Carolina, with some components coming from Europe and Asia.

The emphasis on regionalization was underscored when COVID-19 and a cascade of parts shortages changed how and where automakers source vehicle components.

"Supply chain management will never be like it has been in the past," Post said.

To ensure greater supply chain visibility, BMW is investing in more robust data management systems.