How Long Should Car Key Battery Last. If you notice that your key remote does not unlock your car lock your car or start the engine for those with the automatic start button as early as it should its probably time to replace the battery. Our other cars fob only lasted about three years before it stopped.
Answer 1 of 10. When your battery is reaching three or more years old consider. How long does a battery last in a car key fob.
Youll be able to tell when the doors dont lock and unlock that reliably with the sensors.
Like any other battery it depends upon usage temperature humidity handling and several other variables. The batteries in the Gen 3 SimpliSafe Key Fobs cannot be replaced. A key fob battery will usually last around three to four years before it will need to be replaced. These ford remotes as seen below work for most Ford models between 2000 - 2009.
