I've left my car for a week before and it started right away when I pushed the button.

 

+1 on the alternator. The only thing is your idiot light should have come on? Or maybe a shorted battery cell would put too much load on the alternator causing the static issues and dead battery.

 

To Sick21,

I know exactly what you mean. I was driving and notice that same sound at first i though it was my climate control fan making that sound so i turned it off. I still hear that sound so i shut off sound system. Then i realized that my cooled climate seats were on and that helped with the noise about 80% but i still here it ever so slightly. I am till this day trying to find out what it is. Turning of the climate cooled seats really helped alot.

 

^^Im kinda glad you might have the same noise.. But no cooled or heated seats on.

I just took a clip of the buzzing sound it makes at wot but not sure how to upload a video on here or if that's even aloud...

 

Uploaded on Utube.

 

How did you get it cranked-up? New battery or jumpered... And did your dead battery retain a charge?

 

Jumped it and so far it's held the charge.

 

It sounds like it could be the side view mirror problem where air passes by even though it goes away. On the battery issue its normal been happening from the beginning of the 4th gen I had this issue. I would say bring to dealer but you said 4hrs away that's crazy.

 

I tried folding my mirrors in (by pressing the button) and then back out while going down the highway and it didn't change the noise at all, although I'm sure that could still be a possibility. And yeah, here in Farmington there's only domestic dealers, aside from Kia and Toyota. I considered the Taurus SHO since the dealer is here in town but I really didn't like it, hate the charger. So I mean it really only left cars that aren't sold in my town.

 

So you must be one of the few Lexus in town...

 

GS yes, but a lot of people have RX's and older IS'.

 

No I meant the little triangle. Some have complained it lets air in.

 

If it sounds like air leakage. Check your weather stripping. On my new car I noticed the verticle piece of weather stripping that seals the front door to the "A" pillar is detached at the top rear the roof.

I was at my dealer yesterday (90 miles away which is pain enough for me) and looked at a few IS and GS cars and they all had varing degrees of detachment at the top of the strip? The service manager seemed a little perplexed when I showed him, as it appears to be a design problem.

Can't send a picture because I came home with a loaner AGAIN, as they didn't properly repair the scratches their PPF installer put on my hood! Crazy bugger took a knife to trim the top edge of the film and gouged the paint pretty much the entire length of the hood!

 

I would also try the air conditioning system on manual. You may have a air conditioning door leaking a little bit. Put the air flow to the floor, windshield, vents and see if that changes the character of the noise. Had a similar problem in my Tacoma that drove me nuts for a while.

 

Found my issue! My sunroof isn't sealing all the way.