This heater core is only for BMWs that originally came with a plastic water box core.
Fitment Note for the 528i: This core is only found on the earliest production E39 528i 6 cylinder models built up to 02/1996 (February of 1996). This is a very small subset of the 1997 model year. This note ONLY applies to the 528i.
Behr (no owned by Mahle Behr, and previously Hella Behr) is an original equipment manufacture (OEM) to BMW, supplying many cooling, heating, and other parts to the BMW factories both in the past and today. Buying a Behr heater core ensures you're getting a well fitting part with a long, long lifespan as well as optimal performance, just as BMW designed.
BMW Fitments:
3 Series
E36 (92-99) > 318i M42
E36 (92-99) > 318i M44
E36 (92-99) > 318ic M42
E36 (92-99) > 318ic M44
E36 (92-99) > 318is M42
E36 (92-99) > 318is M44
E36 (92-99) > 323ic
E36 (92-99) > 325i
E36 (92-99) > 325ic
E36 (92-99) > 325is
E36 (92-99) > 328i
E36 (92-99) > 328ic
E36 (92-99) > 328is
E36 (92-99) > M3 (1995)
E36 (92-99) > M3 (96-99)
5 Series
E39 (97-03) > 528i 97-98