BMW X3/Z4 Secondary Air Pump 11727514953

The Secondary Air Pump is a critical component located in the emissions system of your BMW X3 (2004-2006) and Z4 (2003-2005). It plays a vital role in reducing harmful emissions during cold engine start by injecting fresh air into the exhaust stream, promoting the oxidation of unburned fuel. This part interfaces with the exhaust manifold and the engine control unit (ECU), ensuring proper operation of the emission control system. Common issues that necessitate replacement include failure to operate, which can trigger dashboard warning lights, or physical damage due to debris. OEM part numbers for this component include 7571591, 0421993, 7572084, 7513890, and 7514953. Ensure optimal performance and compliance with emissions standards by selecting this genuine OEM part from a salvage vehicle.