I've seen a lot of comments on this topic discussing the issues manufacturers might have with releasing their code as "open source". I say odd because it's orthogonal to the issue here. No one (not even the EFF) seems to want to force auto makers to open source their code - not even if you use a bastardized meaning of open source like Microsoft's "Shared Source". What most articles I've seen propose is instead that it not be a felony to copy, reverse engineer and then inspect the code. Some articles have mentioned letting regulators inspect code, but most stick to a simple request - remove the DMCA Anti-Circumvention protection for automobile software. It's disconcerting to see a relatively simple request be pushed into straw-man territory of requiring all code be open sourced.