when i apply the brakes, i get a really bad vibration, it feels like from the left front side, it is pretty bad, can you help?

I know its not the rotor, i replaced all 4

 

I had the same problem, it ended up being seizing calipers in the rear left and right front.

 

anyone have any other vibration problems?

 

Jack the car up and see if the wheels have any play in them. Possible wheel bearing.

 

my car also vibrates when braking. i got some new rotors but haven't yet installed them. hopefully it's just that but now i dunno.

 

Check Allingnment, Brake calipers, Tie rod ends, Ball joints.
Does it happen more when turning?
What speed does it typically start vibrating?

 

not when turning, just when coming to a stop, but not every time, but most of the time and my left front tire is wearing on the inside, it feels like it is coming from the left side

 

I've been through this twice now - once for the driver's then for the passenger side calipers. I would get small to very large vibrations at random speeds and at random times - this all depended on when the caliper decided to seize. Unfortunately, this also warped good rotors... I would replace the calipers and have the rotors turned, if not replaced.

 

Aftermarket rotors specially those lower quality ones are sometimes warpped. (Slotted and drilled ones)

Places where they cut rotors can tell you if they are badly warped.

The glide/slide pins could be sticking too. replace them if they are no longer round.