Sanyo makes compressors for many cars. The back cover is offered in several configurations to match with a particular car builder's requirements. It appears the previous owner replaced a bad compressor with one from another make of auto. They all work the same and unless you're concours bound I wouldn't worry. Bruce Benson > Hey list, > I was looking at pics of Delorean engines and I noticed that the oil filler > on the A/C compresser is on the top. Mine is on the side. My compresser is a > sayno. I don't know if it's orignal or not. What was the OEM make of the >A/C compresser? > >Ryan