宝马220i 1.5T 2019年款氧传感器11788631393 O2传感器 后装升级

This replacement matches OEM standards in material and process, using high-temperature ceramic core and double stainless steel housing; more stable against thermal shock and chemical corrosion; measured life up to 80,000–100,000 km. OEM number 11788631393; fits BMW 220i 1.5T 2019 model, and similar platforms like X1 and 2-series Touring. Function: precisely monitors exhaust oxygen content and feeds ECU to adjust air-fuel ratio; ensures emissions compliance and stable fuel economy. Installation difficulty: medium; remove mid-pipe section of exhaust; use specialized socket to avoid stripping threads; experienced owners may replace themselves, but better to park in a workshop.