Do any of hte SC owners have felt a slight vibration on their brake pedals when the car is in drive and idle in a stop light with the air-conditioning on. the vibration is very slight and it disapperars if I put in in Neutral or Park or turn off the air-con.

 

Possible issue with the master cylinder??? Sounds like it may also be belt related. I'd have no one other than Lexus service look at it.

 

Bumping this thread b/c i have the same issue.

All the other threads I found when searching were rotor-related issues.

When my car is at idle at a red light, I feel a slight vibration in the brake pedal. It usually starts after I've been driving for at least 15 mins and It does not do it at every red light I am stopped at.

I think it may be a power steering issue b/c I am able to reproduce the exact same vibrating by turning the steering wheel slightly in one direction and holding it there. The vibrating sometimes goes away if I move the steering wheel around also.

OP, were you able to diagnose and fix the problem? Has anyone had similar issue?

 

daaaaaaamn 7 year bump. Good job searching!

If it is pulsing when you are sitting still then it is the ABS pump. Only the fluid flow is in motion when you are stopped, all the mechanicals are still.

 

Interesting, I think I experience the same thing at random times.

 

check brakes pads maybe worn down and rotors too thin.....

 

while STOPPED?

 

i have the same thing but never thought anything about it because its only when the engine is warming up. Pretty sure its not the master cylinder though because my master cylinder only has maybe 5k miles on it and i still have the vibration.

OP said they had their AC on and the vibration went away when they turned it off so it is very likely the compressor but its very rare for me to have my AC on. getting vibration from turning your wheels i would think would be the PS pump but that shouldn't be vibrating if you're sitting still unless you're cranking the hell out of your steering wheel. i'd def. start with OLT's suggestion and try the ABS pump.

 

Check your engine mounts, mine did the same thing very lightly, until i changed them.

 

The petal doesn't pulse only a very light vibration, but im going to have that checked out anyway.

My engine and trans mount were done at 92K and I currently have 136K. I hope my engine mounts aren't already wearing out.

I'm going to be taking the car to the dealership once everything is done getting fixed from my accident.

 

Mine started doing this after my crash a few weeks ago, really interested in how to fix.