Hello.

I'm curently dealing with problem regarding to O2 sensors in my BMW E90 (N52 engine). About two years ago I have replaced both pre-cat O2 sensors (wideband Bosch).

Unfortunatelly form time to time I receive some foults regarding to O2 sensors. I remember that during the instalation of O2 sensors i sprayed the connectors with some of electrical connector sealant, and after that someone told me that wideband O2 connectors shall not be spryed/sealed with any stuff. Can any of You confirm that, electrical connector spray can cause any problems wiith wideband O2 sensors?