Hello everyone, tell me what to do next - if there is no GROUNDING on the o2 sensors heaters? O2 sensors new Bosch, the wiring from the connectors to the ECU has a signal (X62101/3 and X61201/3 to X60002 12-13 pins), ECTS new BMW, open the ECU MSD81? I don't want to open the ECU until the last minute!
