Originally Posted by Mike728

That sucks that they didn't actually fix the issue. 2 battery replacements so early should have proved the fault is related to the TSB.

Originally Posted by Vasili

Haven't been around these parts in a while. Hope all of you are doing well and enjoying the best brand on the planet. I have a question about my 2013 GS.

In January 2016, my GS wouldn't start after sitting for several days. I got it started and took it in to find out the battery was bad already and they changed it.

Flash forward to a few months ago. Same issue, but I started it up and carried on. Didn't bring it to my dealer.

Then yesterday, the same thing. Haven't driven it between Monday and Thursday and viola! Click, click, click when I try to start. I put the charger on for a while and got it to start. Took it to the dealer and they tell me the battery tests fine. However, was told that with "newer cars, if you don't drive them enough (I bought mine in May 2012 and have only 34k miles, so far) the battery drains because of the modules within the vehicle that draw voltage from the battery. If this happens often enough, the battery will drain to the point where the car won't start."

Talked to an independent mechanic I know and he suggested that it is a parasitic drain on the battery from a module probably. To pinpoint where the drain is coming from, a mechanic needs to sit on the issue and watch it with meters. I do have a remote starter that I notice has a blue light on it that is lit all the time, but is that enough to cause this? I looked up a video on YouTube and found that I can do this myself through the process of elimination by using an ammeter and pulling fuses. I would have thought the dealer's mechanic would know this. Or maybe it costs them too much labor to figure it out?

The dealer suggested that when I drive my car, I should hook up a charger at night so the battery will be 100% charged by morning. Really? I have a luxury car that they are suggesting that I should open my hood and charge the battery up at night? Why doesn't that feel right to me? Why didn't this thing happen a couple years ago?

Any ideas or suggestions are helpful.

Originally Posted by bb700092

Anyone with a 2016+ GS had to change the battery or having the battery drain issue?

Originally Posted by Aappie

i have gs 300h 2016 and i have this problem with start the car. Seem like battery or something like that . when i turn airco off, brake park auto off then i can start the car.
i still have 3m warranty but everytime i breng the car to garage everything do fine. They cant find any fail. It gonna crazy with this.

Originally Posted by peasodos

Do you have the original 12v battery in the trunk? If you do it's time to replace it, 5 years old at least and at the end of it's life.

Originally Posted by Aappie

yes. Its original 12v panasonic battery. Thanks for advice.

Originally Posted by peasodos

Yes that battery is on it's way out, needs to be replaced. That will fix your problem. I had to replace the 12v battery on my 450h when it was 5-6 years old.