What is the loud popping noise coming from my car??

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My car is making a very loud popping noise! I just had the power steering recall fixed two weeks ago. The car jerks and pops no matter what kind of road you are driving on!! Was told that the steering colum needs replacing! Mechanic said that the cars is bad about going out! But not definite thats the problem! The racket sounds as if the whole front end is going to fall out from under the car!! And it only has 108,000 miles on it!! And has been girl owned and never been driven rough at all!!!