My car has been making this random popping noise. It sounds like its coming from the driver side somewhere. Today i climbed up underneath it and checked everything and it all looks good. Before i bought the car the the steering rack was replaced by toyota (found the paperwork for it in the glovebox) i have replaced both lower ball joints, brakes, and had it allinged. Also the steering wheel will get nervous at random times then it will be ok. Im running outta ideas.