2007 lexus 460ls battery goes dead if not driven for 2 days. what is wrong??

This is a NEW car, I have a 2005 ES330.

Connect an ammeter to the battery. Pull the fuses one by one. The one where the amps drop, it the circuit where the parasitic draw is. May items draw power, like the radio and the ECM but one will show a big drop.

You can also make sure the hood light and the trunk light is turning off, the vanity mirror as well.

It may be a failing battery, but unlikely in a 2020. Surely it must still be under warranty!

Hi,

we have the same problem. Replaced the battery a month ago and it died yesterday again. The car is at the dealer now. They are trying to blame us for the problem. I have a feeling they know exactly whats wrong, but they are not willing to tell us, since its still under warrenty for 1 month.
Suggestions are;

- the radio might drain your battery, even when its off.
- do you have a homelink? If so, it might be wired the wrong way.

so far thats all i found out by surfing the web.

all new cars are set up that if the battery deads it goes into lockout mode. it is so the dealer ships can make money

This has happened to me TWICE in the past 4 months. I had Lexus road side service come out both times to check the car out. Each time the battery was totally dead. The road side mechanic said that if the car is not driven at least 15 minutes nonstop a day, the battery runs dead as there are so many draws from the car on the battery. If you do alot of stop and start driving like I do, that isn't enough to recharge the cell of the battery, it must be non stop driving time. Recommend that I get a 1.5 tricky charge device an hook to battery at least one night a week to keep the battery charged. This is really frustrating with such a new car. I've spoken to other owners of other model luxury cars and no one has had this problem.

When it won't start you get no lights and if you jump it it takes right off? How long does it have to sit before the battery goes dead?

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we found out that the trunck was open for a couple days there with a light on inside, so the car battery must be dead. Thanks.

With the engin not running and the key off, lift the hood and disconnect the positive lead on the battery. Then touch the lead back to positive terminal on the battery. If a spark is seen, there is something still on in the car. Could be the power mirror switch, seat heaters or even a car phone. Trial and error to find it.

Sorry I can't be more specific but that is the test.

Good luck.

check water in battery or replace it or a wire could be touching or if the battery is not stable it will slide and bump metal and die

it has a draw, and they will be best equipped to find it. There are more modules on that car than the shuttle. it may take them a while, its warranty right?? its just a process of elimination, removing modules/ components from the "LOOP" until the draw goes away. good luck