there are some difference's with the older single vanos and the newer double vanos. you will need a ecu, wire harness, different type of o2 sensors, maf, possibly tranny, some of the older ones had the gm tranny in it, vanos silinoid. so if you get a used motor get a complete with intake manifold, even these are different. unforanutely bmw changed quite a bit form 98 to 99 and on.
plus what the previos poster posted.
The more you complain, the longer
God makes you live. SPHOBA #00002