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How to Repair a Remote Key Although most remote key fobs come with amazing battery lifespan, they eventually wear out. Sometimes it's as simple as replacing the batteries in the device but sometimes the problem can be more serious. Remove the remote from the unit and clean the buttons. Then move them in and out. These techniques might be all you need to get the key fob working. Battery Car key remotes are powered by CR2025 or CR2032 batteries, and they can often be swapped out if the fob is still functional. If not, you can examine the battery terminals or buttons to see if there are any parts that are loose. You should be able to solder the terminals and buttons back into place. However, you will need to know what type of battery is used in the fob. If you're not sure if the battery is the issue Try using a backup key fob to determine whether you are able to start or unlock your vehicle with it. If you are able to do so, it's time to replace the primary fob. If not, a professional inspection is necessary to determine the reason it's not working correctly. car key repair cost could be a simple reconfiguration, or it may require other types repair. There's also the possibility that your vehicle has forgotten your fob, which isn't something you can fix yourself. Case Study The outer plastic housing of a remote is called the case. It typically comes with an alternative button pad. It is essential to choose a new case as the original will probably be a bit shabby, and it is essential that the circuit board is placed correctly in the case. The circuit board controls the key fob's function. You can test it with an instrument set to RF (radiofrequency) mode and a scanner that is tuned to the same frequency as the key fob. Another thing to check is the contact points for buttons on the keypad, which could have become loose or broken over time. Carefully soldering them back in place will often restore them to full functionality unless they completely snap off. Buttons If the buttons on your key fob are no longer working or are difficult to push, you can buy an alternative dorman or Motormite remote key housing online for a low price for your model/year/make. Then, you can slide the circuit board out of your old case into the new one. In some cases, you may need to move the board slightly. The black contact points of the buttons can be adhered to aluminum foil using double-sided tape. Programming The key fob is paired with the receiver of your vehicle. This connection can become corrupted. A professional will examine the car to determine the make, year and model and employ specialist equipment to re-pair or program an empty fob or transponder chip (or make a key replica in the event that it is possible). Then, they test the remote to make sure it works. It is essential to be cautious when programming an unprogrammed key, since the process is often complicated and different manufacturers have certain steps that are slightly different. It is easy to miss a key step or to take too long before exiting the programming mode. To reduce the chance of damaging your car, it is best to hire an expert with extensive knowledge of the security system of your vehicle. Some key programming tools also have the capability of analyzing diagnostic trouble codes from your vehicle. This can aid in repairing or resolving other issues.