Can a locksmith program my existing key fob?

Reprogramming an existing fob (after a battery change or sync loss) is generally quicker and lower cost than a dealer visit, though pricing depends on your specific vehicle.

Adding a spare fob to an existing key set is simpler than all-keys-lost programming because the system already trusts your current key. Bring both keys to the appointment.

If a fob is lost, ask the locksmith to delete it from the system — that prevents anyone who finds it from starting your car. It's a small extra step and worth doing every time.