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How to Repair a Remote Key Although most remote key fobs have impressive battery lifespan, they eventually degrade. Sometimes it's as easy as changing the batteries, but sometimes there are more serious problems. One quick fix that may aid is to disassemble the remote, cleaning the buttons and moving them in and out. These techniques might be all you need to get the key fob to work. Battery Car key remotes utilize CR2025 or CR2032 batteries and they can be replaced when the fob is operational. If not, you can inspect the battery terminals or buttons to see if there are any parts that are loose. remote car key repairs should be able to solder the buttons and terminals back in place. However, you will be required to know which type of battery is used in the fob. If you're unsure if the battery is at fault then make use of a backup fob to start or unlock your car. If you're able to do so, it's probably time to replace the primary fob. If not, a professional inspection is necessary to determine the reason it's not working correctly. It could be a simple reset, or it could require other types repair. You might also discover that your vehicle has forgotten the fob. This isn't something you can tackle by yourself. Case Study The plastic housing that covers the outside of a remote is referred to as the case. It typically comes with a replacement button pad. It is essential to choose an entirely new case since the original case is likely to be quite dirty, and it is essential that the circuit board is placed correctly in the case. The circuit board is what is responsible for controlling the function of the key fob. You can test it by using an instrument set to RF (radiofrequency) mode and a radio scanner that is tuned to the same frequency as the key fob. Another thing to look at is the contact points for buttons on the keypad, which may have become loose or broken over time. Soldering them back in place can often restore them to full function, in the event that they snap completely. Buttons If the buttons on your key fob aren't working or are difficult to push, you can purchase an alternative dorman or Motormite remote key housing online at the lowest cost for the model/year/make. Then, you can take the circuit board from your old case and put it 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 with aluminum foil and double-sided tape. Programming The key fob and receiver inside your car are linked, but this connection can be corrupted. A professional will examine the vehicle to determine the make of the vehicle, year of manufacture and model. They make use of specialist equipment to repair or program the fob with a blank transponder chip (or make a key replica in the event that it is possible). Then they will test the remote to make sure it functions. When reprogramming blank keys, it is important to be careful. The process is complicated and each manufacturer offers different instructions. It is also possible to miss a step, or wait too long before exiting the programming mode, therefore it is best to use a professional with comprehensive knowledge of the security system of your vehicle to reduce the chance of damaging the car. Certain programming tools that are essential to use can also detect diagnostic trouble codes in your vehicle. This will help you repair or troubleshoot other issues.