Well I had never noticed it until this thread, but this morning I noticed I have the same vibration. It goes away when in Neutral and comes back when in gear. Must be something in the transmission/driveline that occurs when colder. Drove it 20 miles and still can fell it. I guess I will get it checked at the next service ;-)

 

IMO, if you didn't notice it before this thread I wouldn't be too concerned about it. The fact that someone had to bring up the subject for you to take notice is an indication that a little bit of vibration is simply expected from any vehicle. These are cars, not wind up toys. They have numerous moving parts that have to work together in concert to produce incredible power and torque. To expect absolute smoothness from every single vehicle day in and day out in all sorts of road, weather, and other environmental conditions is a little bit ridiculous IMO.

Now, if your car is one to vibrate to a degree that is not normal (again, a bit subjective, but I think most on this forum will know when their car is out of the norm) AND it does it:
(a) all the time regardless of environmental conditions (outside temps, road conditions, etc.) or;
(b) when the transmission is in neutral; or
(c) after the car has warmed-up.

Then you should definately have the dealer check it out. For me, I'm fine with the slight vibration I occasionally feel because it doesn't do it in N, it does go away after the car warms up, and when temps are warmer (above 35-40 degrees F or so) it doesn't do it at all.

Hopefully this helps others who are questioning their situation, but I respect anyone who feels to the contrary. Thanks

 

No not necessarily could be a problemn with the wire going to the injector and/ or temperature sensor (i.e. rubbing on a surface a causing high resitance causing a faultly "signal" voltage, etc) or a temp sensor that is not calibrated.

I was just throwing this out there as a possibility, however it is far fetched in a way. Again if the said issue is not noticed in nuetral then more than likely it is else where because if it is a rough idle you would feel it either way.

--Pete

 

I really think that the car is trying to get warm up. During cold start, it usually idle around 1000 (N or D, and only in the cold morning). After the car warms up, it goes down to around 700. I don't think there is anything to be concerned about. If you are still worry about it, please call your dealership.

 

I guess I'm not the only one. 37F outside. Two days in a row. ~1000 RPM Idle on red light. It is down to 700 after 10 min of driving...

 

My wife is reporting the same for our New GX-470, she told me something is wrong with the SUV that its vibrating like one of the tires is going other way, I check the tires they all seems to be OK, also getting Tire inflation light also.
Check the tire pressure and its ~32-33 psi in all 4. she mostly drive Stop & GO and dont have long run to warm up the SUV, This is not good for a 50K Car, I had others SUV before but never seen anything like this.

 

My 06Gs300 AWD has same idle problem. I'm living in NC so cold weather is not an issue here. but still has this problem. Sometime even after I drove 20-30mils still can feel strong idle while waiting the light.The RPM is normal 500-600. reported to dealer and they have my car for two days already still can't find out what's wrong with it.

 

Finally, this subject comes up.. My car has been in the shop for a month now with this problem. I haven't cared since the weather sux now and I've had a fun IS to drive the whole time. I noticed it well before having my springs installed, so it's not related, and the spring rate change is only 5% anyway. It just got progressivly worse as it got colder so I finally took it in. Try turning OFF the AC/Heater/Fans, it will probably make the vibration even more noticable. These are Lexus vehicles, I'm used to not being able to tell if i've started the car or not.. these vibrations shouldn't be there..

They've also taken care of the fuel rail recall and seat belt TSB while its been there. During the fuel rail change they looked around and noticed carbon & oil buildup around two cylinders (1 & 6 I believe) .. turns out there was a slight internal oil leak around the pcv valve.. they found out by calling corporate service, apparently its been found before, they just havent created a TSB.. so I'd watch out for that as well.. Might mention it if you haven't taken your car in for the fuel rail recall yet.. I'm guessing they're starting to find this problem with the recall rapairs since they open everything up. They did an engine/fuel system cleaning, replaced the valve and all seals.

Back to the vibration.. They ended up removing the exhaust system and the vibration dissapears.. so they replaced all the mounts including engine mounts, put exhaust back on and the vibration remains. They also changed out all the spark plugs.. With everything they've done so far, the vibrations are 'a little' better, but they are not satisfied with it yet and are working with corporate service. I haven't gone back yet to test myself, but if they want to keep working on it and send in an engine specialist, i'm not going to argue.. I've already got most of my next major service items taken care of I'm just waiting for the call to make me a deal on a new car..

So, for those of you with this problem, TAKE YOUR CAR IN.. these cars should not vibrate at any temperature.. your dealer most likely won't have a clue and will contact corporate service as well.. maybe another recall is due or they will have more incentive to get this problem figured out..

 

Just for an update
My car has been in dealer's hand for about a week. Still no answer from them....sigh

 

Just got my car back today. But the dealer still cannot fix it. They told me there is nothing more they can do at this point. The dealer said they tested and compared some other 06GS300 AWD and RWD.and it seem only the AWD has same idle feel, just not as bad as mine, but not for the RWD.
So is any RWD ower has the same problem??

They do want me go back next week and meet with some one comes from corporate, and show him my car's idle problem. then they will open an case for this issue.

 

ck106, do you have springs on your car? i tend to agree that its a problem with AWD cars.. even the AWD IS i've had as my loaner w/only 5k mi on it has a similar but not as noticable vibration under load. it appears to get worse over time, in the cold, and with the ac/heat off.. let me ke know what they say when corporate looks at it.. they still have mine.. almost ready to just go up there and tell them to make me a deal on a 460 we don't get much snow around here any more anyway..

 

I didn't drop my car.
I will post again after I talk to lexus.
BTW
Is anyone feels car vibration when you stop the car and gear in R. Because I felt the almost identical vibration as car gear in D.

 

Kuch123, The dealer called me today and told me that the guy suppose to come this week from corporate won't be here until next month.
But I went to another Lexus dealer and they will take look my car next week.
I will keep posting after they look in it.
I am thinking go for 350 But RWD this time

 

thanks for the update! maybe he's at at my dealership looking at my car they still have it.. no calls this week thus far.. they have an 07 350 AWD on the lot that has been titled (technically used) but it only has 2000mi on it.. might try to work a deal into it if no hope on fixing the problem.. although i really think this is a problem with their AWD system in general, but not necessarily in all cars.. The IS250 AWD loaner that i've had all this time has a very similar vibration, and is even more noticeable the last few days as it has been much colder.. now if this were a lexus version of the toyota tundra, which I would buy by the way (hint hint to lex, something to compete with the escalade EXT ), i wouldn't much care about the vibration..

 

i have had my 3gs for almost a year and this week i was probably driving around 60mph and i noticed a vibration almost as if my wheels where not balanced????? but after a couple of minutes it went away. cold weather issues i dont know? have not had a problem since. also this ride has no mods, so i cant blame it on the springs. this is either a normal stage for the car or we have lots of issues on hand???