This site documents my construction of a laptop-based interface to the various computers (ECU, SRS, ABS, etc.) in
my 1999 BMW 323ti.
I have what must be one of the few 323ti's in the US -- and amazingly, the car was almost completely unmolested
on its way into the country. But one of the few downsides of this is that I don't have an OBD-II port, so I can't use a
So I've built an interface to the ECUs via the 20-pin connector. These pages document what I've learned through
hours of agonizing research, so the next poor slob who wants to figure this out doesn't have to re-invent the wheel.