Weak range or intermittent buttons usually mean a dying coin battery — a cheap fix worth trying first. If a fresh battery does not help, the fob may have lost pairing or failed electronically.
Reprogramming restores a working fob to the vehicle; replacement is needed when the fob is lost or dead. Aftermarket fobs cost less than dealer OEM parts but vary in quality — confirm compatibility with your exact year, make, model and trim.
What to have ready
Vehicle year, make, model, whether you have any working key, and the VIN. HSI Locksmith cuts and programs replacement keys and fobs at your location, subject to vehicle compatibility.