How to Repair a Remote Key
While the majority of remote key fobs come with impressive battery lives they will eventually wear out. Sometimes it's as simple as replacing the batteries, but sometimes there are more serious issues.
An easy fix that could aid is to disassemble the remote, cleaning the buttons and stretching them out and in. These methods could be all you need to get the key fob to work.
Battery
Car key remotes utilize CR2025 or CR2032 batteries and can usually be replaced in the event that the device is functional. If not accessible, you can take it off the fob and check the buttons and battery terminals to look for signs of wear or damaged parts. You can usually solder the terminals and buttons back into their original positions. However, you'll be required to know which type of battery is used in your fob.
If remote car key repair near me isn't the issue you can try an alternative key fob to see whether you can unlock or start your car using it. If it's possible do so, it's probably time to replace the primary fob. If not, you will require a professional examine it to find the problem. It could be as simple as reprogramming, or it could require other repairs. It could also be that your vehicle has lost the fob. This is not something you can do by yourself.
Case
The outer plastic housing of a remote is known as the case. It usually comes with an alternative button pad. It is important to use a new case as the original will probably be pretty grungy and it is vital that the circuit board is installed properly in the case. The circuit board is the main component of the key fob and can be tested with a normal multimeter by setting it to RF (radio frequency) mode and then holding a radio scanner tuned to the same frequency that the key fob uses next to it, listening for pulsing signals when a the button's presses.
Another thing to examine is the button contact points on the keypad, which might have become damaged or loose over time. Soldering them back into place can often restore them to full functionality, in the event that they snap completely.
Buttons
IF your key fob buttons do not function anymore 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 from your old case into the new one. In some cases it may be necessary to adjust the position of the board slightly. You can then apply aluminum foil using double-sided tape to adhere to the black contact points on the buttons.
Programming
The key fob and receiver inside your car are connected however, this connection may be damaged. A professional will inspect your vehicle to determine the year, make and model. They'll then use specialist equipment to recouple or program the transponder chip with a blank fob (or copy the key, if possible). Then, they test the remote to make sure it works.
When programming blank keys it is essential to be careful. The process is complicated and each manufacturer comes with distinct instructions. It is also easy to miss a step, or wait too long before exiting the programming mode, so it is recommended to work with professionals with extensive knowledge of your car's security system to minimize the risk of harming the car. Some key programming tools can also read diagnostic trouble codes on your vehicle. This can help you solve other issues.