I'm So Done

[Mr-Mad]

I have struggled with my 2000 BMW 323i since it was wrecked into was wrecked into by a drunk driver 2 months after I bought it. It has had electrical problems ever since, all I keep doing is replacing part after part and nothing ever seems to fix the issue. I have done everything but replace the ECM as far as I know. For instance the transmission is for lack of a better word f***ed. It downshifts extremely hard and that is just the tip of the iceberg. It says the back lights are on, on the dash, and I know they are not. The radio has stopped working. The sunroof opens randomly. The electronic stabilizer is fickle as well. It works only when it wants to. I don't know what. I want it to work this is going on 18 years that I have struggled with it! PLEASE HELP!