Warped rotors: I feel like being dragged (vibrating) when I turn wheels?
 

I have 2004 Honda CR-V(LX) 4 wheel drive with 90,000 miles.Lately, I've noticed some dragging when I turn the wheel or back up the car while turning the wheel. It happens in low speed. Similar symptom happens when I apply brake on about 40 mph.My mechanic told me it's warped brake and needed to replace 2 front rotors, 2 rear rotors and new pads since he could not cut the rotors.(I've never had brake done and It has about 90,000 miles on it)Can I have a second opinion ? I'd appreciate your advice.

It probably is the rotors but you may want your wheel bearings checked on it to .... With 90,000 miles it may be the wheel bearings with the dragging on corners.

The dragging you are feeling could be metal to metal contact from the pads (if the brake linings have worn off) and the rotors which is more noticeable at low speeds. Warped rotors give the vehicle a shuddering effect felt strongly through the steering wheel and the brake pedal. Either way the rotors will need to be replaced as well as the pads, immediately if there is metal to metal contact. You must be a very sensible driver to have gotten 90K out of a set of brakes. Congrats.