OKAY MOTOR Secondary Air Injection Pump for BMW E46 325i 325i 325ci M54 323i 328i 330i M52 Secondary Air Pump for BMW E46 323 325 328 330 M52 M54 2.5 2.8 3.0L Part #: 11727553056, 11521435365, 11721435364 180-daysmanufacturer type warranty limited New aftermarket replacement part. Applications: E46 323Ci M52 2.5L; 323i M52 2.5L; 325Ci M54 2.5L; 325i M54 2.5L; 325xi M54 2.5L; 328Ci M52 2.8L; 328i M52 2.8L; 330Ci M54 3.0L; 330i M54 3.0L; 330xi M54 3.0L