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Why Your Seat Leon Replacement Key Won't Work? If your Seat Leon remote key stopped working abruptly, there are several possible causes. These include the battery of your coin is dead, water damage, receiver module problems, and radio interference. Make sure you replace a lost key using the correct type and size. Also, be sure the new key is programmed to your vehicle. Dead coin battery The most common reason for your seatleon key fob not working is a dead coin battery. It is simple to repair and will only take some minutes. However, the issue could be caused by damaged buttons, worn buttons, signal interference, and receiver module issues. These issues can be solved with an OBDII scan or by reprogramming your key fob. The coin battery that is located in the key fob of your Seat Leon is a very crucial component of the remote keyless system. It has metal retaining clips to keep it in position and complete the circuit to send power to the receiver module. If the clips become loose or are corroded, it can cause the circuit to fail. To fix the issue replace the battery one of the same size, voltage and type. If the key fob has been exposed to water, it is suggested to wipe it clean using a paper towel and isopropyl alcohol. This will prevent further corrosion or damage. It is essential to allow the electronics to completely dry before replacing the battery. Contacts to the battery are not working properly. The key fob on your Leon is equipped with metal clips that bind the battery and complete the circuit. Contact issues can happen if these clips are not properly tensioned. This can also happen in the event that the battery was replaced with one that's the wrong size or voltage. The best method to fix this is to replace the old battery with a new one. Choose pop over to this website that is similar in size and power as the original. The fob may also fail due to damaged battery contacts damaged or leaking water, signal interference or a dead 12 volt battery. In this scenario, you must disconnect the 12 Volt batteries for a few seconds. Reconnect the positive and negative cables following. If your Seat Leon keys don't work, you may need to contact an experienced auto locksmith. UK Auto Locksmith can help you with a range of car key services including reprogramming of the key chip. They offer reasonable rates and are trained to handle your car keys repair requirements. A malfunctioning receiver module The key fob of the seat Leon is a tiny device that transmits signals to your vehicle. The immobilizer system in the car may stop working when these signals aren't received in a timely manner. This could be because of interference from objects, bad weather conditions, or transmitters using the same frequency band. The key fob can function within a certain range. The battery inside the key fob is secured by clips made of metal. Contact points may fail if they're worn out, corroded, or damaged by rust. You can replace the battery on your key fob quickly however you must ensure that it's the exact size and voltage as the original. If your key fob is not functioning properly and it is not working, it could be time to replace the battery or the receiver module. A professional can repair this issue for a small cost. You can also program the key fob by yourself and save money by not paying the dealer to complete the process. A professional can also assist you with other issues, for instance the malfunctioning TIPM (transmission immobilizer control unit). They can also install a brand new ignition switch or sensor. Radio interference The key fob communicates with the car via radio waves, but they are susceptible to being snuffed out by a lot of interference. This can be due to broadcast towers, airplanes and even satellites. This type of interference may also affect the range your key. If your remote key operates from a short distance you can try placing it next to your head or chin to see if it fixes the problem. Resetting the receiver module will usually be enough to fix a Leon keyfob that has stopped working. It is as simple as dismantling the battery for a couple of minutes (first, the negative cable, then the positive cable). Afterwards the key fob will function as usual. If not, you may have to visit an authorized dealer to reprogramme the. You can also utilize an OBDDII scanner for diagnosing the problem. It could be that the chip inside the key fob has developed a fault, that will require replacement. This is more likely to happen when the key fob has been exposed to salt or water.