[542458]

But software is much more complicated. If I put aftermarket suspension in, it's pretty unlikely that it will significantly screw up my brakes. But with software, it's a lot harder to say what affects what, especially considering how many cars have a single computer that handles both critical and non-critical tasks. A media player mod could very well screw up the brakes by hogging system resources or crashing the computer. If my insurance refuses to pay out after a crash on account of that, do I have to prove my mods to be safe?

NB: I have almost no idea how liability and insurance works in the US.