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How to Repair a Remote Key Even though most remote key fobs have amazing battery life, they will eventually wear out. Some times it is as simple as changing the batteries inside the device, but in other cases the problem can be more serious. Take apart the remote and clean the buttons. Then move them out and in. These steps could be all you need to get your key fob to work. Battery Car key remotes are powered by CR2025 or CR2032 batteries, and they can often be replaced in the event that the device is functional. If it isn't accessible, you can take it off the fob and inspect the batteries' terminals and buttons for any signs of looseness or damaged parts. You can usually connect the terminals and buttons back into their original positions. However, you'll have to know the type of battery is used in your fob. If the battery isn't the problem Try using a backup key fob to determine whether you are able to unlock or start your vehicle with it. If you can, then it's time to replace the primary fob. If it doesn't require replacement, you'll require a professional to examine it to find the issue. It could be as easy as reprogramming, or it could require other types of repair. You might also discover that your car has lost the fob. This is not something you can tackle on your own. Case The outer plastic housing of a remote is known as the case. It is usually equipped with an additional button pad. It is recommended to purchase the latest case since the original one is likely to be very grungy. Additionally, it is essential that the circuit board in the case is correctly placed. The circuit board is what controls the key fob's function. You can test it with an instrument set to RF (radiofrequency) mode, and a radio scanner that is tuned to the same frequency as the key fob. Examine the contact points of the keys on the keypad. They could have become loose over time, or even broken. Soldering them back to their original position can often restore them to their original functionality, except if they snap completely. Buttons If your key fob buttons don't work anymore or are difficult to press for any reason, a motormite or dorman remote key housing replacement can be purchased online for a reasonable price for your year/make and model. Then pop the circuit board from your old case into the new. It is possible to alter the position of the circuit board on certain models. key repair can then apply aluminum foil using double-sided tape to adhere to the black contact points on the buttons. Programming The key fob is paired with the receiver inside your vehicle, and this connection can be corrupted. A professional will examine the car to determine the manufacturer, year, year and model and use specialist equipment to re-pair or program the fob with a blank transponder chip (or duplicate a key should this be possible). Then they test the remote to be sure that it works. It is crucial to be cautious when programming a blank key, as the process can be complicated and different manufacturers have distinct steps. It is easy to skip a step or wait too long before exiting the programming mode. To avoid the risk of damaging your car, it is best to hire an expert with vast knowledge of the security system in your vehicle. Certain key programming tools are also capable of reading diagnostic trouble codes from your vehicle, which can aid in repairing or resolving additional issues.