Last October, Tesla CEO Elon Musk finally admitted that it might be the case, but he didn’t want to commit fully: We are not 100% sure. HW4 has several times the capability of HW3. It’s easier to get things to work on HW4 and it takes a lot of efforts to squeeze that into HW3. There is some chance that HW3 does not achieve the safety level that allows for unsupervised FSD. Today, just 3 months later, Tesla’s management was asked about the HW3 situation again. Tesla’s head of FSD, Ashok Elluswamy, first responded that they “are not giving up on it”, but then Musk corrected him saying that “the truth is that we will need to replace all HW3 computers in vehicles where FSD was purchased.” He said that Tesla would replace them for free, but he specified that it will only be for people who bought the up to $15,000 Full Self-Driving package. That could prove problematic as Tesla always promised that “all cars produced since 2016 are capable of Full Self-Driving” – not just the ones who paid for the software. Top comment by andrewp