I replaced my front rotors and brake pad about 20k miles ago. Today when I start braking the steering wheel start shaking and the hard i brake he more it shakes. It's not really bad but definitely noticeable. Is it normal for it to go that soon? Btw parts are Lexus oem not aftermarket.

 

did you replace the front and back pads? or just one side?

 

I replaced both front rotors and front pads.

 

Well, all depends on your driving habits and drive pattern, i.e. more city driving and stop & go will wear them out faster. Also depends if the sliders and clips were cleaned and lubed properly at the time of service. Since you are in PA, and if you live in the humid area, rotors could be getting surface rust when taken off leave the raised section under the pad and over time this will give you the vibrations...

Another thing to consider is that the vibration could be coming from the rear rotors, were they ever replaced?

Lastly, the parts could be still within warranty depending on how long ago they were replaced, so you could possibly get free replacement parts if you complain...

 

get your rotors resurfaced and you should be good to go

 

Did some rally hard braking between 10-40mph and it doesn't shake anymore. Weird
Also did some high speed at 60-90mph none either. How is this possible?

 

A really good check is at 60-70mph with light pedal application. That should tell you if there is any distortion to the rotors. Harder braking may not show it or could show rear rotor issues...

Other one is if before the first time it happened if the rotors had lots of surface corrosion and until it cleared it was vibrating...

Keep an eye on it and check both FR and RR. They don't go straight on their own

 

I just changed my rear rotors and pads about two months ago. Maybe do more testing

 

The shaking went away all of a sudden.