Steering wheel jerk while applying brake

[sapote]

FCAB (AGK Poly) have only been on a month or so (improperly installed?).

I would check the FCAB and if it flexing too much under braking then it could cause the symptom you have. The other reason is somehow one of the front brake grabbing brake rotor too much but I don't see why suddenly this happens as it was not touched on recently.

[Mattn1192]

While driving, if I tap my brakes, my steering wheel would jerk after each tap. That’s never happened until now.. Not sure what it is. Pads & rotors are fairly new. Car gets driven once or twice a week. FCAB (AGK Poly) have only been on a month or so (improperly installed?). Anyone ever have this problem before or know what’s causing this?