[Mayan]

N54/335i/JB4.
I read the pdf and it's still confusing. How am I supposed to know what is the #19/#20 etc wire? Does anyone have a good video of it being done? I never installed the jb4 either and I'm reading the docs for that and I'm even more confused. My mechanic won't touch it he doesn't know what to do either. The mechanic who installed the jb4 originally went out of business too. I need help

[fordbaxter]

I am also confused on how to install the downpipe fix on a flash-only car

[Ballistic]

The instructions are as clear as can be. The wire position numbers are on the connector.
I suggest you try and find someone else who can do this for you.

[Miller335]

The pdf has all the info you need.