OKAY MOTOR Secondary Air Injection Pump for 96-99 BMW E36 323is 323ic 328i 328is 328ic Secondary Air Pump for 1996-1999 BMW E36 323i 328i E46 M3 Part #: 11721744490, 721852850, 721852100, 1744490 New Aftermarket Replacement Unit. 180-days Manufacturer Type Warranty Limited. Applications: 1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3i