My Comma Three Dev Kit is dead; I bought it from www.comma.ai that I used in my 2020 Toyota RAV4 Hybrid:

I bought my Comma Three unit in Aug 2021 and started having issues about a year ago (2023). After buying two USBC cables ($20 each) and a brand new harness kit ($200) from www.comma.ai, I’m still having issues. I have installed latest release software and sadly it’s still having issues.

I’m out of warranty and stuck with the choice of buying a new Comma C3x unit (that I can no longer afford) or possibly sending it into repair (that I can’t afford too).

It was fun while it lasted I suppose, but safe travels everyone and I hope you have longer use than I did!