Hi, I'm new to the site but can anyone help me with a braking problem I have. When I bought the car, I noticed under fast or slow braking, the car or brake pedal pulses. I recently bought brand new rotors on all fours but after they were broken in, it's starting to pulse again.

 

Sounds like warping/judder/pad-transfer issues.

Three Q's:

1) Did you replace the pads along with the rotors?

2) Did you bed the pads in if they were replaced?

3) Did you service the caliper slides when you replaced the rotors and/or pads?

 

He's got it ^

I changed out slide pins, pads, rotors - all at once, and made sure everything was in proper working order.
Bada bing. It brakes well now.

By the way, there is an appropriate section for your specific topic of discussion.
Goodluck.

 

I did everything except the service on the clipers. but when i replaced the rotors, i did not notice any pulsation. after a month of breaking them in, it started to pulse again.

 

pull the wheels, check one of the rotors and the pads see if theres any kind of buildup on certain spots of the rotors and check the pads too. what kind of pads/rotors are you using?

 

Pads and rotors are from EBC. I'm trying to avoid taking it to Lexus dealership and would be my last option but I wanted to see if I can troubleshoot this myself with some help.