The vehicle was taken in for an alignment. The dealership stated all was well. Two days later my family and I take a trip and I notice it is drifting to the right. Well I bring it back in and they check the alignment again. This time theysay it is all out of whack. The front and back. The tech informed me that they were able to put it all in specs except the front left side. They are recommending that I replace the lower control arm even after they tell me they cannot find anything mechanically faulty.

If both your experiences are from the same alignment shop , I would first advise you to go to another shop for another opinion. And while at the new repair shop it's okay to ask for certification, ASE certification in suspension and steering and if your findings turnout differently and your problems are resolved with a different diagnosis and repair then I would return to the first alignment shop with all paperwork and receipts from both places showing the complete difference in the final diagnosis and outcome and demand a refund for incompetent & incorrect diagnosis and repair.

Gettng to your repair needs, upon your intial visit to the first alignment shop was there a noticable problem with the alignment wheras the vehicle had any obvious pull or drift issues that caused you to seek attention in this area.

If the answer is no, no initial problems but vehicle was aligned, then I suspect maybe a faulty alignment took place , you say the vehicle had drift issues , if the car was aligned but the steering wheel was not centered which is the very last adjustment on any alignement, this is the adjustment that takes place as the tech sets toe-in or toe- out . If the steering wheel appeared centered with wheels pointed straight ahead then it should track straight in travel on a road with minimal crown, unless the camber and caster was off severly on the right side.

Assuming this vehicle is 100% accident free I don't forsee any control arms being suddenly bent or so out of tolerance that a total A-Arm replacement is the recommendation. I think the best advice for you is to take your vehicle to areputable shop , but first research the shop , ask for references from the shop service manger and if they are reluctant then choose the another shop. Also you may want to check any factory technical bulletiens on any alignment issues with your vehicle make and year model... Hope this helps, thanks, ask if further information is needed...