not sure if this item is the specific reason why, but it seemed to be the only common denominator in each scenario. I received a #ViralixUSA #viralix coupon code for a USB C Car Charger & any time I plugged it into the cigarette Lighter in my 2004 Lexus RX330, the very next day, my heat stopped working. I believe it shorted something that caused my heat to stop working & had to bring the car into the shop TWICE! I wouldn't reccomend this but then again, my car is OLD, 2004 so not sure if this really caused it or not but was THE ONLY COMMON DENOMINATOR EACH TIME MY HEAT STOPPED WORKING!