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How to Repair a Remote Key Although many remote key fobs come with impressive battery lifespan, they eventually wear out. Some times it is simple to replace the batteries in the device but sometimes the issue could be more serious. An easy fix that could help is dismantling the remote, cleaning the buttons and flexing them in and out. These methods could be all that you need to get your key fob working again. Battery If the fob is functioning you can replace the CR2025 or CR2032 battery. If it's not, you can open the fob and examine the buttons and battery terminals to look for signs of wear or damaged parts. You should be able to solder the terminals and buttons back into their original positions. However, you'll need to know what kind of battery is being used in the fob. If you're not sure if the battery is at fault, use a backup fob to start or unlock your car. If it's possible, it's time for a replacement of the primary fob. If not require replacement, you'll require a professional assess the fob to identify the issue. It could be as easy as reprogramming it, or require different types of repairs. You might also discover that your car has lost the fob. This is not something you can fix on your own. Case Study The plastic housing that covers the outside of a remote is known as the case. It typically comes with an alternative button pad. It is best to use a brand new case, because the one you have will likely to be extremely dirty. Additionally, it is crucial that the circuit board within the case is placed correctly. The circuit board is what is responsible for controlling the function of the key fob. You can test it using a multimeter 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 button contact points on the keypad, which might have become damaged or loose in the course of time. Soldering them back into place can often restore them to their original 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 could be purchased for a low price online for the year/make/model you have. Then pop the circuit board from your old case into the new. For certain models, you may need to adjust the position of 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 can become corrupted. A professional will examine the vehicle to determine the make, year and model and employ specialist equipment to re-pair or program a blank fob or transponder chip (or clone a key should this be possible). Then key repair service test the remote to be sure it functions. It is crucial to be cautious when reprogramming the blank key, because the process is often complicated and different brands require certain steps that are slightly different. It is also possible to skip a step or delay too long before leaving the programming mode, so it is best to use an expert with a thorough understanding of your car's security system to avoid harming the car. Certain programming tools also have the capability of analyzing diagnostic trouble codes from your vehicle. This can aid in repairing or resolving further issues.