https://anotepad.com/notes/5gy3y5cb Key Fob Repair - Replace the Battery Key fobs last between three and four years. When they begin to appear worn it's a good idea examine them for damage and to consider a battery replacement. Fortunately, most car manufacturers utilize coin-shaped batteries that are sold in pharmacies, grocery stores, and hardware stores. You can also find videos online from people who have shared their experiences on how to replace a key fob battery yourself. Reduced Operational range It's likely that the battery is dead when the key fob stops functioning reliably. Luckily, there are many different types of batteries for key fobs that are available at supermarkets, pharmacies and home improvement stores that can be purchased and easily replaced. Most key fobs use a lithium-ion coin or button cell battery that is easy to replace and open. However certain fobs have the battery soldered to the case, which may require an automotive technician who has experience in taking out key fob batteries in order to access it. The fob has to be programmed after the battery has been replaced to function correctly. Certain cars allow you to program a replacement key fob using your owner's guide or an online source. Others require that this procedure be carried out at the dealership. For instance, Consumer Reports' automotive analyst Mel Yu explains that Mercedes-Benz keys can only be purchased directly from the manufacturer and can only be programmed at an authorized dealer due to the digital encryption that is used to protect the keys. Another issue with remote keys is that their operation can be affected by ambient noise as well as other environmental elements. For instance, certain buildings are constructed with structural steel, which absorb radio signals from the key fob and interfere with its range. This can also happen with remote keyfobs that aren't operated by drivers. If the issue persists after replacing the battery or having your remote keyfob professi