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Tesla has plenty of parts built by other car makers / suppliers. https://www.carscoops.com/2018/05/tesla-blames-bosch-recall-125000-model-s-cars/ https://www.c

• btilly 8y ago
  Tesla does. But builds most of their parts in house. And even outsourced parts may wind up inside of the part you need to replace, and therefore you're still bottlenecked on Tesla.