GXOAP-9149 is an overrunning alternator pulley for catalog-listed BMW applications. Catalog technical data includes OD1 54, OD2 49, W 38, R 6, ID 17, M M16, CLOCK CW. OEM/cross-reference numbers are listed for Bmw, Ina, Valeo, Cargo, Wai. Alternator references are listed for Valeo. Review the catalog fitment and reference numbers for compatibility before ordering.