“All parts for this vehicle, whether internal or from suppliers, need to be designed and built to sub 10 micron accuracy.”
Musk wants every Cybertruck part, including supplier parts, held to single-digit microns. Moving a part from sunlight to shade shifts its dimensions by more than that. He sent a near-identical email about the Model 3 in 2018, promising build precision ten times better than any car in the world. Tesla never got there, and the bill for this round lands on suppliers.