[Esac1282]

Hey guys so I’m having an issue with my e90 for a while now The codes I get are misfiring on cylinder 4,5,6, oxygen sensors, misfire on low tank level, missing alternator and missing water pump. I’ve already replace the water pump, alternator, both oxygen sensor and spark plugs and coils. But none of the codes have gone away. I’m not worried about the secondary air code. But I’m at a loss and I don’t know what to do. Especially with the misfires