Yep and the sad part is it's hard to know the full extent of it. Some bugs are fixable by the ingame bugfixer(not there to fix a "problem that's actually already patched out, but you never know" like most game do), some by a bit of tinkering and a few of them needs an expert's tocuh(that I lack being an amateur).
If you don't have incest enabled the game breaks around that point if I remember right. I used the cheat mod to turn it on but there are other ways I think.
There is no mechanist work in the game anymore. It was cut out and you are merely seeing the remnants. The garage is only there for the races but you are not there yet.
