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Saab Key ProgrammingSaab cars built since about 1994 feature an immobilizer mechanism based on coded keys. A new transponder is required for addition of an extra key, and special programming. This is usually done at the dealer with a specialized Tech2 diagnostic tool.The issue is that this could be extremely expensive. It is always advisable to keep an extra set of keys in your possession.saab keys replacement is a piece of key with an electronic chip. The chip transmits a signal when the key is inserted into the ignition. The car will check to see whether the signal matches the one on the key. If the signals are in sync then the car will be able to unlock and begin. This is a great method to protect your car from theft.Transponder keys are a favored feature in vehicles, but you should be aware that they are not as secure as traditional keys made of metal. While the metal portion of a conventional key can be cut and copied, a transponder is protected by an electronic chip. The chip is equipped with an individual 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. However, it is only able to do this if your key fob is unmodified and has a chip that has been programmed to match. The car will not start in the event that the key is not programmed to match.It's essential to ensure that you have an extra key for your Saab. This is particularly true for those who live in a rural area that is home to many car thieves. The good news is that you can find a new key for your Saab without having to go to a dealership and pay the high prices that they charge. You can get the replacement key on the spot for less than half the price you'd pay at dealerships.Key for WiredSaab cars are usually provided with two keys. If you own only one, you should get an extra key as soon as you can. This is because, if it's lost the car will require a new CIM and the locking cylinders replaced. This can be costly especially if you're buying a second-hand car.The next step is to connect the row and columns wires to your microcontroller. This is the most difficult aspect of the project and it will require lots of soldering. There's no standard way to do this, but it is crucial to plan the route you'll take and solder the columns and rows. There are 22 microcontroller wires as well as pins to connect for this keyboard. It has five rows and 17 column.After the rows and column are joined, it is time to connect the key switches. To do this, place a diode over each pin on the key switch and then solder it. This will protect the key switch pins from current and prevent them from being shorted. A diode allows current to only flow in one direction. It comes with a visual indicator, a black band, that shows the direction in which the current will flow.Some of the tools you can find at auto parts stores -- such as the Autel MaxiIM IM608 PRO and IM508 -- can assist customers at the shop or DIY customers in some cases program replacement keys and restore lost immobilizer data, Sanabria says. The tools plug into OBD ports and guide the user through each step which makes the process much easier than replacing the vehicle's computer.Jump-starting the batteryMost people keep an item in their trunk to jump-start a vehicle in an emergency, but it might not be the best idea for newer cars. They have numerous digital and electronic devices that communicate with each other. A surge of voltage when a battery is connected to another one could cause damage to the parts making your car unusable.Start the working vehicle and let it run for about two minutes before connecting the cables to the battery that is not working. Attach the red clip to the positive terminal of the good battery. (It will say "POS" or "+".) Attach the other end to a clean unpainted metal surface under the hood of the disabled vehicle. The engine block is an excellent option. Don't connect the black cable to the negative terminal of the dead battery because this could trigger an ignition that ignites the gasoline in the engine bay.After the cables have been connected, start the car and let it run for about five minutes. Then, disconnect the cables in reverse. The battery in the Saab 9-3 will charge as you drive. It may take a while it to drop back down. You should purchase a second key fob, when you can. Replacing the only one that works requires the installation and programming of a new computer chip.Replacement CaseMany Saab owners only have one key for their vehicle and if they lose that it's going to cost them. The reason for this is that it's not inexpensive to buy a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. In the event of theft, or any other calamity it is best to have a spare key. Don't buy a secondhand key even it's "new." Keys that are claimed-new from aftermarket sellers will not be effective and are almost guaranteed to fail in the crucial moment.The dealer will charge the highest dollars if you only have one working key. We can reset and reprogram the computer's EEEPROM to be able to accept a new key without replacing the entire system. This could save you a significant amount of money. It's much cheaper than wait until you lose the only key.