宝马氧传感器 11787557223 0258017124，提升燃烧效率的可靠选择

Oxygen sensor for BMW N46/N52 engines, original numbers 11787557223 and 0258017124, both directly interchangeable. Uses high-temperature ceramic element and corrosion-resistant stainless steel housing; heat resistance and impact resistance validated, bench tests show lifespan 50k–80k kilometers. Installed in the front portion of the exhaust, accurately monitors exhaust oxygen content; ECU uses it to adjust the air-fuel ratio dynamically, improving combustion efficiency, reducing carbon buildup, and lowering fuel consumption. Fits 3 Series E90, 5 Series E60, etc. Requires a special socket and torque control during installation.