Next time it happens, pull the fuse for the HIDs to rule out the HIDs causing the shake. If it stops shaking then the HID ballast might be causing the interference.

 

what hid kit do you have?

 

I have an 07 IS205 AWD. Is there a TSB on the steering?

 

I have the KLight HID kit. 6000k

 

This is starting to seem like an epidemic.. Scary. I've had my hid kit since 06 and no problems yet.

 

I am having the same problem in my 07 IS250. My headlight had to be changed out because of
a wreck and they put in a used headlight from another IS with a after market HID bulb.
Sometimes I noticed that that the aftermarket HID would flicker or just turn off.
I had to turn it off and turn it back on again to get it to work. A month after this my
power steering went out. It would some times come back on after I turn off and turn on the car and then after a little while the P/S would go out.
I took it to the dealer and the code which it was giving was
C1511 (Torque sensor circuit malfunction) and the dealer changed out the Power steering ECU and it worked well for a week and the P/S went out again. I came across this forum and told the dealer it could be the aftermarket HID interfering with the P/S but the dealer is saying that cannot be possible. I have read from other people's experience on how aftermarket HID kits cause interference but I didnt install any kit but just put in a aftermarket HID bulb into my existing ballast and had the same problem. I have now removed the aftermarket bulb and so far its working now. Now if the problem occurs again I am thinking of changing out the ballast as well.