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How to Repair a Dead Car Key Sometimes extreme heat or cold can cause a car key to stop functioning properly. Take a moment before replacing it. If your car keys are damaged, it's a real trouble. It happens at the worst possible timing! There are a variety of ways to fix the broken car key that don't involve paying for the purchase of a new key. Dead Key Fob Battery Modern key fobs allow us to open doors, trunks, and tailgates easily without the need to search for a key in the car. Some key fobs even have a built-in key that can be used to start our vehicles. The fobs are powered by a small battery. If the battery fails then the key fob will not be able to transmit the signal to activate the vehicle. Luckily, there are several ways you can repair the problem and get your car functioning again. First, try to find out if your key fob is actually dead. If it appears dead, you will require replacing the batteries. You can do this yourself by disconnecting the fob from its clip, or using a screwdriver with a flat head. Be cautious not to apply too much pressure or you could cause damage to the fob. You should also make sure that you're using a correct type of battery. Some models may require a different battery. If you aren't sure what type your car requires it is possible to find the details in your owner's manual or visit an Interstate All Battery Center to have a battery expert help you. If the key fob isn't dead, you can sometimes revive it by bringing it closer to your car. The majority of key fobs utilize RFID (radio frequency identification), which only works in a limited range. The ignition system must be able detect the signal. If you are able to move just a few inches closer to your vehicle, it could unlock or even start. Many car makers have an emergency mechanism that is activated when the key fob battery is dead. For instance, the majority of Ford models have a dedicated slot for the key fob which will activate the engine when inserted correctly. You can find instructions in the owner's manual of how to locate this slot and insert the key fob in the correct way. If you're unable to start your car with this method, make sure to contact roadside assistance for assistance. Broken Key Ring The internal chip inside the key fob is what transmits to your car's immobilizer to allow it to start the motor. If this chip becomes damaged or if there are programming mistakes, the key fob will not be able send the correct identification code, and your car will not start. In some instances the problem with a defective transponder key may be caused by physical damage or wear and tear to the key shell or contact pads. You will often see warning signs on your dashboard if keys are not communicating with the immobilizer system of your vehicle. These could include error messages, a flashing light or the key not locking or unlocking the vehicle. If you are noticing these warnings contact your local locksmith immediately for key fob replacement or repair. It is very easy to damage your key ring by putting too much pressure on it, especially when carrying multiple keys. This can cause the fob to break in half. This is one of the main causes of broken car key. You can apply super glue on both sides of the crack and gently press them together to repair the issue. It is crucial to make use of a gel-type glue that is slow drying to avoid drips or runniness. If this method doesn't work then you must contact a professional locksmith right away to avoid further damage to your vehicle. A locksmith who is certified can replace or repair your key fob quickly, and they will be able to ensure that the ignition lock as well as the door lock aren't affected during the process. It can be very frustrating when your key fob is damaged. However, it's not a reason to panic or be angry. You can take proactive steps to decrease the chance of your key fob breaking in the near future. These include regular maintenance, key protectors, and keeping a spare. Quicksmith's staff is on hand to assist you in the event that your key fob fails. Broken Key Loop One of my MK5 keysfobs broke off the small key ring on the top, which is where it joins the keyfob. It appears to be made of very soft plastic or metal. I've made a hole, then wet-sanded the area to make it more durable. But I suspect that's not helping. repair car keys 've also wrapped the broken part of the ring with clear tape, but that isn't doing any good. keys repair is a pity, as I rely on the small split ring to keep my keys in place. If the key fob case itself is broken it is usually possible to open up the case and replace the battery (assuming the battery isn't dead). Online kits are available however they're only an interim solution. It is more efficient to have it repaired by a mechanic. You can also find a new case at the locksmith or home improvement store. They're unlikely to cost as much as an entirely new key fob.