I think they are all the same in the E30, so year shouldn't matter too much, although I would look for the newest one you can find, of course.
It's a PITA, but it's not terrible. I found instructions through BimmerDIY.com, they were pretty much right on. The hardest part is getting it out around the steering column, honestly.
I can't speak to putting one back in, I've pulled two but never installed one. Fortunately, I have my windshield out, so I think reinstallation might be a bit easier.
