nwin

I've got a 2017 AWD GS350 with 45k miles on it. I bought it about 6 months ago as a certified Lexus from the dealership. I checked and the battery is OEM with a service date of August 2020, so only 1.5 years old.

I live in Northern Virginia and only drive it once a week or so due to telework. It's been cold here recently and in the past month the battery has died twice, both requiring jumpstarts. I drove it around and recharged it.

I didn't have any issues with this during the summer, during which time I installed both an MPC remote start and the carlinkit Carplay kit.

I'm going to get the battery tested, as it seems to lose about .2V per day using a multimeter to test.

Curious if anyone has experienced the same issues and if they think a plug and play remote start or carplay kit could be the culprit.

Also leaning towards an AGM battery since those seem to handle all the electronics a bit better.

AJLex19

There is a possibility that something aftermarket you've added is drawing power even when the car is off. That is probably the first place to start. However, there is a known issue with a parasitic battery drain due to a bad ECU. Here's are some recent posts:

https://www.clublexus.com/forums/gs-...l#post10921152
https://www.clublexus.com/forums/gs-...ery-drain.html

lexo98

iTrader: (2)

I have the MPC kit with the app. I can see battery voltage on my phone when the car is off.

peasodos

iTrader: (1)

Most likely battery is fine. I forgot if the Carlinkit was connected to the fuse box or not, but if it is you have to make sure you tap ignition switched power fuse slot.

I have an aftermarket remote start with an app to see battery voltage, location, start car, open trunk, lock/unlock doors.
I also have Carlinkit installed.
I also live in NOVA.
My battery is 2.5 years old.

I've had my car sit for just over 2 weeks and start no problem.

nwin

Thanks, but it looks like that's just from 2013-2015? Mine's a 2017.

My MPC kit doesn't have the app. It just uses the key fob...I wish I knew that, I would have sprung the extra money because that'd be really useful!

I know I never touched the fuse boxes when installing the Carlinkit. It was all plug and play with a bunch of pigtails/t-connectors. However I'm concerned it's drawing power somewhere. The only way I can think to troubleshoot is by uninstalling the carlinkit and taking an ammeter to see what the draw is with the car turned off.