How to Repair a Remote Key
Even though most remote key fobs come with impressive battery life, they do eventually wear out. Sometimes it's as simple as replacing the batteries, however sometimes there are more serious issues.
Remove the remote from the unit and clean the buttons. Then bend them in and out. These techniques may be all that you require to get your key fob working again.
Battery
If the fob is working you can replace the CR2025 or CR2032 battery. If not, you can look at the battery terminals and buttons to determine if there are any missing parts. It is usually possible to solder the terminals and buttons back into their original positions. However, you'll be required to know which type of battery is installed in the fob.
If you're not sure if the battery is the issue Try using a backup key fob and see if you can start or unlock your vehicle using it. If you're able to do so, it's probably time to replace your primary fob. If not, a professional check is required to determine why it's not working correctly. It could be as simple as reconfiguration, or it may require other types of repairs. It could also be that your vehicle has lost the fob. This isn't something you can tackle on your own.
Case
The case of a remote key is the outer plastic housing and typically comes with the button pad that is replaced. It is important to use a new case as the original case is likely to be pretty grungy and it is crucial that the circuit board is installed correctly in the case. The circuit board controls the key fob's function. You can test it using a multimeter set to RF (radiofrequency) mode and a radio scanner that is tuned to the same frequency as the key fob.
Check the contact points of the keys on the keypad. They may be loose over time, or even broken. Soldering them back in place will often allow them to return to full function, in the event that they break completely.
Buttons
If the buttons on your key fob aren't working anymore or are difficult to push, you can buy a new dorman or motormite remote key housing online at the lowest cost for the model/year/make. Then pop the circuit board from your old case into the new. You may need to alter the position of the circuit board for certain models. You can then apply aluminum foil with double sided tape to adhere to the black contact points on the buttons.
Programming
The key fob and receiver inside your car are paired however this connection could be damaged. A professional will inspect the car to determine the manufacturer, year model, year and model. car keys repairs near me will make use of specialist equipment to repair or program the fob with a blank transponder chip (or clone a key if this is possible). They will then test the remote to confirm that it works.
When reprogramming blank keys, it is important to be careful. The process is complex and each manufacturer has different instructions. It is easy to miss a key step or to take too long before exiting the programming mode. To minimize the risk of damaging your vehicle, it is best to hire an expert with extensive knowledge of the security system in your vehicle. Certain key programming tools can also read diagnostic trouble codes in your vehicle. This will help you repair or troubleshoot other issues.