AP01 2X Secondary Air Injection Pump For 911 95B959253 This secondary air injection pump is designed for compatibility with specific vehicle models requiring the 95B959253.The AP01 2X unit supports the emission control system by delivering additional air to the exhaust manifold during engine warm-up, aiding in the reduction of emissions.It serves as a direct replacement for the component, featuring a construction to withstand operational heat and pressure.The pump integrates into the existing air injection system and functions efficiently under standard operating conditions.Installation requires basic mechanical knowledge and standard tools.proper electrical connections and hose fittings during replacement for performance.