Petersan65

I am new to this Forum but have been amazed about how many owners 350/450h owners have had problems with the 12 v auxiliary battery going flat. I thought I was the only one! I have a 350h+ which was purchased new in Nov 2022 and have had 3 occasions ( 2 within one month) when the battery went completely flat with the embarrassing lock out from the car. Each time I called the AA who jumped started the car and recommended I took it to the Lexus dealer. Each time the dealer checked the car and battery and said there were no technical issues. They told me that the battery is going flat because of low mileage/intermittent usage which seems to be a familiar story with many other users. Looking through many of your responses I am encouraged that many of you have found a "work around" to the issue by using trickle chargers/booster packs/voltage meters and turning off all electrical systems when leaving the car. Whilst I love the car it has become unreliable. Does anybody know if this issue is being worked on by Toyota? Would a larger auxiliary battery fix the issue? This is a luxury car (LEXUS=Luxury USA) and we should not have to be using trickle chargers or booster packs!