BMW 7 Series E66 735Li 3.6L Front Left Oxygen Sensor 11787516149

When your BMW 7 Series E66 735Li 3.6L exhibits rough idle, acceleration jerk, noticeably higher fuel consumption, or check engine light on, the front-left oxygen sensor aging is likely causing air-fuel ratio imbalance. This sensor monitors oxygen content in exhaust in real time and feeds signals to the ECU to precisely control injection, ensuring efficient combustion and reduced emissions. OEM number 11787516149, for BMW 7 Series E66 735Li 3.6L models. Installation uses a dedicated socket to carefully remove the old sensor without damaging threads, apply a small amount of anti-seize to the new sensor threads, and ensure installation torque meets OEM standards.