宝马5系后氧传感器11787545244 0258006790 O2传感器 提升三元催化效率

For BMW 5 Series (F10/F11 chassis) and models equipped with N52/N55 engines, the rear oxygen sensor (OEM 11787545244, compatible with 0258006790) is a core component for improving catalytic converter efficiency. It continuously monitors exhaust oxygen content and sends signals to the ECU to optimize air-fuel ratio, reducing fuel consumption and emissions. This sensor effectively resolves common issues like MIL illumination, weak acceleration, and rough idle. Direct replacement for OEM 11787545244, with good cross-compatibility.