Today tesla service came out to replace my spoiler and do some test for grinding noise from front end motors. When he left, I got in the model 3 to reverse park into my driveway, I notice a loud flying saucer type noise from front end when backing into parking spot at home. it's a Sept 2018 Model so it doesn't have the Pedestrian Noise Maker installed, what is that noise. I think its either the motors up front or heating/cooling system or perhaps the new update?. Its around 35 degrees tonight. Also FYI i just updated to the new software last night and haven't driven it since after MObile Service left tonight.