I have a lexus rx350 2011. Had dealer install remote start. Battery is dead after car sits for 7 days. Happened twice. Dealer says there is no problem. Had it to Lexus repair twice. It always starts for them, they say. Originally was told to get a car trickler. Was also told I don't drive it enough to allow alternator to charge battery. Had two lexus vehicles before this one and no problems. any ideas would be greatly appriciated.

something is turned on and killing the battery. Check the trunk light....(does it really go out when the lid is closed?. Take the bulb (s) out and see if that makes a difference....also if you have one on the hood lid....do the same thing...and pull out the cig lighter too...and also the bulb in the glove box. Something that is NOT on your accessories power is staying on.

They will find the problem

Some module is not going to sleep

If they had done the proper testing they would be
done by now

check the brake fluid level , also check the abs sensors on each wheel for rust or dirty

your autnater or somting is staying on

take it back to dealer ,might need reprogramming ,these things are always a pain and go wrong i have seen them on imported cars here but i have had to disable them as they are illegal here as its an offence to leave a unattended vehicle running .

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?

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

Sounds as though when your battery died the engine imobiIiser locked down.
YOU MAY HAVE TO HAVE THE CAR TOWED TO A LEXUS DEALER AND HAVE THE MASTER KEY AND OTHERS REPROGRAMMED TO THE IGNITION...BUT
If you have your wallet key as well , try taking all to the airport. HOLD the card to the dash beside the ignition for at least 20 seconds, then try turning the key several times. I haven`t done an LS but the failsafe when a remote fails is to hold the key beside the ignition for at least 20 seconds ....
Also try the lock routine, but I think the issue is in dash..security needing to reboot to your key.
My understanding is that the lock routine re initialises the lock setstings when power is restored

The car does not have an alarm system but does have a remote start system installed by a certified dealer.