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Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't WorkingKey fobs can have issues with time, like an inability to function. Certain issues might require professional attention, but most can be fixed at home.The first step is generally to replace the battery. Most fobs use flat watch-style batteries that are readily available in hardware stores or auto parts stores.Dead BatteryIt can be a major inconvenience when a key fob's battery dies. This is particularly true when you are far from home. Fortunately, there are ways to get back on the road if your car's keyless entry doesn't work.One of the first things to be sure of is to determine if the buttons on the key fob function. If they do, the problem may lie in the locks of your car instead of the fob.If your keys don't work you need to look for a key slot with a mechanical lock concealed in the trim of your door handle or on another part of the vehicle (consult the owner's manual). Insert the mechanical key, and try again. If this doesn't work certain cars come with an app that lets you unlock the doors remotely. For example the FordPass Connect app, myChevrolet mobile app, and myMazda app permit owners to open their doors using their smartphones. These apps charge monthly subscription fees.You should also check whether your key fob won't drain the batteries of your car by sitting on them. remote car key repair can drain your battery fast especially if it's used to control the TV or phone while you are watching.A key fob that's just low on battery may be activated by bringing it up to the start button. This simple fix could save you from a trip to your dealer or Interstate All Battery Centers.If your key fob doesn't work You can test it in a car with an electronic starter button. If it doesn't, you may need to replace the fob battery. It's a good idea keep a spare key fob in your bag or purse.Damaged ButtonsIf your key fob is unable to unlock doors or start your car remotely, it's possible that one or more of its buttons have been damaged. Your key fob is equipped with a circuit with "contact pads" that are covered with an electrically conductory film. This film wears off over time. The wear may cause your fob to react less quickly, or not at all.The good news is that the contact pad inside a car key fob can be replaced easily, and is done using a flathead screwdriver. If, however, the key fob is badly smashed or harmed in any way, it may be more difficult to remove the case, and you'll need to take the fob to an auto shop for repair.It's not unusual for a key fob to being dropped, trampled, or exposed water. These incidents can cause physical damage, such as bending and snapping the keys.This could also cause internal damage to the fob that could result in a malfunction. This is why it's a good idea to carry a spare key fob inside your pocket or wallet in case you accidentally damage the one you own.Make sure the battery is charged first to determine if the buttons on your key fob aren't working as they should. Remember that key fobs don't come with a particular type of electronic device - most of them run on the same two-dollar batteries that are used in watches and hearing aids that are readily available at drug stores, hardware stores, and online.If the battery is good it is possible that the buttons are dirty or worn out. You can easily clean them with a damp cloth. If the buttons don't work, you can test an alternative car key fob. This will help determine if the problem is yours or a particular model. If the other key fob is working, then yours might need to be reprogrammed or replaced.ReprogrammingThe hidden world of car keys fobs is much more complex than many myths suggest. The basic fobs function by using unique radio frequency signals that are assigned to specific vehicles. The fobs have to be programmed correctly to be able to unlock and start the vehicle. Unfortunately it's not as simple as pressing a few buttons, and with a few exceptions, it needs to be handled by the dealer.Check the owner's manual for more detailed instructions. Certain manufacturers, such as Mercedes, use proprietary technologies that only dealers are able to create a new key fob and resync it to your vehicle. Some independent shops might offer this service, so be sure to read reviews and prices prior to choosing the right shop.Certain car models wipe out all other fobs after they've been programmed, meaning you'll have to have any additional fobs programmed professionally. This is a costly proposition especially if you're only down to one functioning fob. Even in the event that the mechanical key will not start the vehicle, it's a good idea to have a backup that can open the doors and trunk.If you do attempt to reprogram your fob yourself, be prepared for a difficult journey. You'll be disappointed with the numerous guides on the internet that claim to be successful. A lot of these guides were written by people with no experience and are based on unsubstantiated statements. Some even claim that you can program your own car key fob with just a few clicks, which can be very misleading.Most key fobs are held by a plastic clip which is easy to remove, however, the battery is located inside the circuit board, and you'll have to carefully pry it out with a tool. You should be able find the button battery. It's usually an insignificant battery for a watch, which you can purchase at most pharmacies or at home improvement stores. It's typically simple to replace the battery. Before replacing the whole device, you should try it first.ReplacementThere are several methods to fix a broken or non-functioning car key fob. An easy fix could be as easy as replacing the battery or programming the key fob but a more in-depth repair might be required. It's also beneficial to keep a spare fob in the event that one is lost or stolen.The majority of modern key fobs have a small physical key in addition to the electronics they use, which makes them both more expensive and more complex to replace than traditional keys. Some "smart" fobs come with a remote starter. It's important to understand that it could take an hour or more to cut and program the replacement fob to your vehicle.Fobs use a small radio transmitter on circuit boards to communicate with the car's receiver. When you press a button, the transmitter emits an RF signal unique to the car's receiver. The receiver receives the signal and validates it against the preprogrammed codes. This lets the driver unlock the car and begin it from a distance, without inserting the key into the ignition or turning the lock.If your key fob buttons are not responding or working intermittently, they may be damaged by water. It is possible to fix the fob by disassembling it and inspecting for any broken or non-responsive buttons. If this doesn't fix the issue, try reprogramming your fob or getting another one.You should check with an auto dealer in your area or a locksmith prior to purchasing a replacement keyfob online to make sure it's compatible with the security system of your vehicle. Fobs purchased from a third party can be cheaper but you should look into the brands and read reviews prior to attempting to program them yourself. While some fobs can be replaced by a reputable locksmith, others require specialized equipment to program them that can only be used by a vehicle dealer or auto technician.