BMW Oxygen Sensor - Genuine BMW 11781739845

Ensure precise exhaust gas monitoring and optimal engine performance with this **Genuine BMW Oxygen Sensor (Lambda Sensor) – Part Number 11781739845**.

This critical **downstream oxygen sensor** is specifically designed to be located **after the catalytic converter**. It plays a vital role in your BMW's emissions system by meticulously measuring the oxygen content in the exhaust gases. The sensor relays this essential data to the engine control unit (ECU), enabling precise adjustments to the air/fuel mixture for improved fuel efficiency, reduced harmful emissions, and accurate system diagnostics, preventing check engine light illumination.

As an authentic BMW part, it guarantees a direct fit, superior quality, and the reliability synonymous with the BMW brand.

**Key Applications Include:**
* BMW 318i, 318is, 318ti (1996-1999 with 1.9L L4 M44 engine) - Downstream sensor.
* BMW 750iL (1998-2001 with 5.4L V12 M73/M73N engine) - Downstream Left/Right sensor.
* BMW X5 4.4i, 4.6is (2000-2003 with 4.4L/4.6L V8 M62 engine) - Downstream Left/Right sensor.

Trust in genuine parts to maintain your BMW's engineered excellence.