Not tried it, but if you could take measurements of the points where its bolted to the chassis and compare with the E36 (You may have to visit a scrap yard or a friends E46 for that). So far all I've done is use the 3 spoke steering of the E46 on mine.
I think they might be able to fit...but you're probably going to need the seat rails for the E46 and you're probably going to need slight modification. I know someone put CSL seats into their E36 328is so it's definitely possible.
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