the factory unit is a nippondenso, if you want the best get a reman from nippondenso, you can not tell the difference from brand new other then the $. theres a lot of crappy remans out there, i've had some that wouldn't out live their one year warranty, my favorite was a 93 325 a few years ago i put 3 compressors on that car before they traded it in, about 8 months was all they would last then the clutch would die or something, i can't remember the company but they painted the compressor black (about 1/3 of the companys paint em black). i have a nip reman sitting on my bench to install on a 97 740il monday (by the way whoever designed the placemant of the expansion valve on a e38 needs to have his balls removed so he can't contaminate the rest of mankind with his inferior engineering genes)
all america wants is cold beer warm cat and a place to take a poop with a door on it