How to Repair a Remote Key
While most remote key fobs come with excellent battery life, they will eventually wear out. Sometimes it's as simple as replacing the batteries, but occasionally there are more serious issues.
Take the remote apart and clean the buttons. Then, flex them out and in. These steps could be all you need to get the key fob to work.
Battery
Car key remotes use CR2025 or CR2032 batteries and they can be swapped out in the event that the device is operational. If not, you can look at the battery terminals and buttons to determine if there are any missing parts. You can usually solder the terminals and buttons back into place. However, you will have to know the type of battery is installed in your fob.
If key repair service whether the battery is at fault you can utilize a backup fob in order to unlock or start your car. If you can, then it's time to replace your primary fob. If not then you'll require a professional to examine it to find the issue. It could be as simple as reprogramming or it may require other types of repair. There's also the possibility that your car has lost your fob and isn't something you can fix on your own.
Case
The case of remote keys is the plastic case that surrounds it and usually comes with the replacement button pad. It is best to use a brand new case, since the original one will likely to be extremely grungy. It is crucial that the circuit board inside the case is properly positioned. The circuit board is responsible for controlling the function of the key fob. You can test it with a multimeter set to RF (radiofrequency) mode and a scanner that is tuned to the same frequency as the key fob.
Another thing to examine is the button contact points on the keypad, which may be loose or damaged over time. Soldering them back in place will often allow them to return to full functionality, in the event that they snap completely.
Buttons
IF your key fob buttons no longer work or are difficult to press, a dorman or motormite remote key housing replacement can be purchased online for a reasonable price for the year/make/model you have. Then pop the circuit board out of your old case into the new one. For certain models you may have to move the board slightly. The black contact points of buttons can be adhered to aluminum foil using double-sided tape.
Programming
The key fob is linked with the receiver inside your vehicle, and this connection could be damaged. A professional will inspect your vehicle to determine the year, make, and model. They will then employ specialist equipment to recouple or program the transponder chip with a blank fob (or clone the key if possible). Then they will test the remote to be sure that it works.
It is crucial to be cautious when programming an unprogrammed key, since the process can be complicated and different manufacturers require slightly different steps. It is also easy to skip a step or wait too long before exiting the programming mode, which is why it is recommended to work with professionals with extensive knowledge of your car's security system to reduce the chance of damaging the car. Certain key programming tools can also read diagnostic trouble codes in your vehicle. This can assist you to repair or troubleshoot other issues.