Is it best to buy a key/key fob yourself or let the locksmith provide a key? It's best to have the locksmith provide the key for  many reasons. First your car can take different keys at the same time for example a smart key and semi smart, talking to a locksmith first would be ideal because a well experienced locksmith will know exactly what kind of keys your car needs. Also we can match the quality and price of a key that you are trying to but online and thats a second reason why you don't need to buy one yourself. Third Locksmiths don't usually give warranty on the keys you buy. a locksmith normally gives warranty on keys they provide.

So it's safer, less expensive, and less headache when you let a locksmith provide a key and a key fob.