Is 2002 when they went to a 40 pin connector?

I've seen people claim that 2001 is 40 pin, but mine is 17 pin (No Nav, w/DSP).

If it's a 17 Pin, you can just tap into pin 7 (white/grey stripe/yellow dashes or "dots"--although I've read that others have grey/white stripe/yellow dots) for the signal if it's looking for the signal for steering wheel controls.

Some people state that you *have* to intercept it at the steering column, but I tapped into it right at the 17 pin connector and it works perfectly. You can always try that (as it's quick/easy to make the connection there) and if it doesn't work, then dig deeper for a different spot in the car.

Not sure if that's the information you're looking for though as I've never installed one of those units.