What models can be fitted with the Omega alternator ?
There are essentially only 2 versions of the kit, to fit all models from 1970 through 1995. 1970 through 1976 models have a 105mm diameter stator / crankcase interface, and all 1977 through 1995 models have a 107mm diameter. The original stator and housing used on the /5 models from 1970 through 1973 is considerably smaller than the Omega stator, and this makes the original stator housing unusable for Omega installation. To mount the Omega on a /5, a 1974 through 1995 stator housing, BMW part #12311243002, must be used. The original /5 brush holder assembly is exactly the same and fits the later housing. This was exactly the same part on all sizes of engines made from 1974 through 1995. The housings can usually be purchased used, fairly inexpensively.