There was a recall about the ignition, they (the dealership) replaced it in my car in July, a week ago the key got stuck in the ignition, and ever since it gets stuck, should I take my car to the dealership? Would they charge me for this service?

 

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Yes you should take it back to the dealership that did the repair/recall
Most repairs done have a 12/12 warranty period but since this was a recall item it should still be covered...
HOWEVER if you have an excess amount of weight on your key chain that could be causing the lock to get damaged (read your fault) it may not be...
I would take it in, just be sure your key chain is not loaded with more then a couple of other keys and no bling...