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Saab Key Programming Saab cars produced since 1994 feature an immobilizer system based on a set of keys. To add an additional key, you need a new transponder, as well as special programming. This is usually done at the dealer, using a specially-designed Tech2 diagnostic tool. It can be costly. Always keep an extra set of keys at hand. Transponder key The transponder can be described as a key that has an electronic chip. The chip transmits a signal when the key is inserted in the ignition. The car will check to see whether the signal matches the one on the key. If the signals are identical the car will be able to unlock itself and start. This is a great method to safeguard your car from theft. Transponder keys are an increasingly popular feature in cars, but you must be aware that they are not as secure as classic metal keys. The metal part of the traditional key can easily be copied and cut, but a transponder has an electronic chip that safeguards it. The chip is equipped with a unique code that is programmed into the car's computers to identify it. When a Saab key fob is used, the car recognizes it and allows it to turn on. The car will only recognize the key fob if it has a chip that is unmodified and has been programmed to match. The car will not start in the event that the key has not been programmed to match. It is crucial to have a spare Saab key. This is particularly true especially if you live in a rural area that is home to numerous car thieves. The good part is that you can find a new key for your Saab without needing to visit an auto dealership and pay the hefty prices that they charge. You can have the replacement key on the spot for less than half the price you'd spend at an auto dealer. Wired key Saab cars are typically delivered with two keys. If you only have one, it's a good idea to get an additional key fob as soon as is possible since if you lose it the car will require the replacement of a CIM unit, and the locking cylinders will have to be replaced. This can be expensive particularly for used cars. The next step is connecting the row and columns wires to your microcontroller. This is the most challenging part of the project and requires a significant amount of soldering. It's not a standard way to go about it, but you should consider how you will route and connect each column and row. There are 22 microcontroller wires and pins to connect for this keyboard. It has 5 rows and 17 columns. Once the rows and columns are soldered, it's time to connect them to key switches. Solder a diode on each key switch pin. This will protect the pins from current, and prevent them from being shortened. A diode allows the flow of current to be in one direction, and it comes with a the black band as a visual indicator that indicates which way the current will flow. Sanabria states that some of the tools offered in auto parts stores, like the Autel MaxiIM IM608PRO and the IM508 are able to assist customers shopping or DIY customers to program replacement keys and restore immobilizer data. The tools connect to OBD ports and guide the customer through each step, making the process easier than replacing the car's computer. Jump-starting the battery A lot of people keep a set in their trunk to jump start a vehicle in an emergency, but it might not be the best idea for cars with more modern technology. These vehicles are equipped with digital and computer systems that communicate with one another. A surge in voltage when batteries are connected to another could cause damage to the components making your car inoperable. Start the vehicle you are using and let it run for about two minutes before connecting the cables to the disabled one. Attach the red clip to the positive terminal of the good battery. (It will read “POS” or “+”.) Attach the other end to a clean and unpainted metal surface beneath the hood of your disabled car. The engine block is a great alternative. The black cable should not be connected to the negative terminal of the dead battery. This could cause sparks, which could ignite the gasoline that is in the engine compartment. After the cables have been connected, you can start the vehicle and let it run about five minutes. Then, disconnect the cables in reverse. Be aware that the battery of the Saab 9-3 gets recharged during your drive, which means it may take some time for the battery to come back down again. It's a good idea to invest in a spare key fob as soon as you can, because replacing the sole working one requires the installation of a new computer module and special programming to convince it that your lost keys aren't attempting to steal the car. Replacement case Many Saab owners have only one key for their vehicle and if they lose it, they'll be charged. The reason is that it's costly to buy a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, in addition to programming. In how to program saab 9-3 key fob of theft, or other catastrophe it is advisable to have a spare key. However, don't purchase a secondhand key even when it's “new.” Keys that are claimed to be new from a second-hand store will not be effective and are almost guaranteed to fail at the critical moment. Most locksmiths can't help you with a single working key, and the dealer will charge for the cost of replacing the computer in your vehicle to create a replacement. We can reset and reprogram the EEEPROM of your computer to make it ready to accept a replacement key without replacing the entire system. This can save you a lot of money. It's cheaper to do this instead of waiting until you lose the only key.