BMW Secondary Air Injection Mass Air Flow Sensor - Genuine BMW 11721438814

Ensure your BMW's emissions system operates at peak efficiency with this **Genuine BMW Secondary Air Injection Mass Air Flow Sensor**. This essential component, identified by **Part Number 11721438814 (OE Number: 11721438814)**, precisely measures the air entering your vehicle's secondary air injection pump.

The Secondary Air Injection (SAI) system is critical for reducing harmful exhaust emissions, particularly during cold starts, by injecting fresh air into the exhaust manifold to aid catalytic converter warm-up. A malfunctioning SAI Mass Air Flow Sensor can trigger a "Check Engine" light, result in failed emissions inspections, and potentially affect engine performance.

As a Genuine BMW part, it guarantees the highest quality, perfect fit, and reliable operation, meeting strict factory standards. This sensor is compatible with a wide array of BMW models from approximately 2003 to 2010, including the 325Ci, 325i, 325xi, 330Ci, 330i, 330xi, 525i, 530i, X3, X5, and even high-performance M5 and M6 models, covering M54, M56, and S85 V10 engines. Replace your faulty sensor with an authentic BMW part to maintain your vehicle's integrity and emission compliance.