https://trade-britanica.trade/....wiki/How_Much_Do_Key
How to Fix a Key Fob That isn't Working If your key fob doesn't work then you can fix it by following just a few steps. The first step is to be sure that it's not the backup remote. If the backup remote is able to lock and unlock your car doors it is most likely an issue with the main remote. The most common causes of key problems with your car remote are circuitry or battery issues. Battery The battery inside a key fob can get worn out over the course of time. It is relatively easy to change out batteries, but