o2 sensor n52

Hey guys, I’m rocking a BMW E60 525i 2008 with N52 engine. Recently few issues popped up regarding my oxygen sensors as per the pic attached. Does anyone have similar problem like mine? I have asked many mechanics but they said since it’s an old car, the issue will persist even after changing...

Hi all, Recently my machine e60 LCI - n52 start to give complain on the o2 sensor error. The 01 sensor before the exhaust is the culprit. I have searched in the forum but unfortunately not much information. Anyone changed this before? If yes, did you change 4 in 1 short? Or just 1 at a time? I...