https://www.thekeylab.co.uk/carkeyrepair/ Key Fob Repair - Replace the Battery Key fobs last for anywhere from three to four years. If they begin to exhibit signs of being damaged, you should inspect them for damage and replace the battery, if needed. Fortunately, a lot of car makers make use of coin-shaped batteries, which are sold in pharmacies, grocery stores, and hardware stores. You can also find online videos of users who explain how to replace the battery on the key fob. Reduced Operational Range It's most likely that the battery is dead when a key fob stops working effectively. Fortunately, there are different types of batteries for key fobs available in supermarkets, pharmacies, and home improvement stores that can be bought and replaced easily. The majority of key fobs are powered by a lithium-ion battery or coin cell battery, which is simple to replace. Certain fobs might include the battery in the case. This will require an automotive technician who is adept at removing batteries from key fobs. The fob must be programmed after the battery is replaced to function properly. Certain vehicles permit owners to program the replacement key fob with the owner's manual or an online resource, while others require that you head to a dealership for this service. Mel Yu, Consumer Reports automotive analyst says that Mercedes Benz keys can only be programmed by a dealer due to the digital encryption. Another problem with remote key fobs is that their operation could be affected by ambient noise and other environmental factors. For instance, certain buildings are constructed with structural steel, which can absorb radio transmissions from the key fob, and interfere with its range. This can also be an issue with remote key fobs that aren't being operated by the driver. If replacing and having your remote key fob programmed fails to resolve the issue it could be a larger mechanical issue with the key fob or its internal components. In these instances, it's best to contac