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A car key fob is an electronic device that communicates with your immobiliser system in the vehicle to unlock and start the engine. It also has buttons to lock and unlock the doors.
Before you decide to purchase a new key fob examine your car's warranty insurance, and roadside assistance coverage to see if they cover the cost.
Battery
If the unlock button on your key fob isn't working, it could be due to the battery being dead. A battery typically lasts between three and four years however, it could fail abruptly due to a variety of reasons. The majority of automakers have fail-safes which permit you to lock and start your vehicle, even if your key fob does not have a battery.
It's a great idea to clean the circuit board and the interior of the battery prior to replacing it. You can clean the inside and circuit board with cotton swabs soaked in 90 percent of alcohol. Then, you should let the swab dry for several days.
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