Infiniti Repair Questions? Ask a Mechanic for Answers ASAP
I'd say to 1st check the mounting face of the disc rotors as if there's some dirt or debris on the face then the disc rotor will not be bolted up square and true and this will produce the same effect as a warped rotor
this can also be verified by doing a 'run-out' measurement as shown in the attached image
if this is OK then I'd check the condition of the suspension joints
jack the car up so the wheel is off the ground and shake the tyre from top to bottom and from side to side (with someone holding the steering wheel on the front) there should be no play in either direction. Any play in 1 direction will usually require a joint to be replaced, if there’s play in both directions then the wheel bearing may be at fault. If theres play only up and down its the strut top mount - to find this one you have to shake the suspension strut it self up and down with the wheel off the ground - so you may need to remove the wheel to check this one.
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