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Saab Key Programming Saab cars produced since 1994 use an immobilizer system that is based on coded keys. A new transponder is required for the addition of a second key, as well as special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. The issue is that this can be very expensive. This is why you should always have a spare key at hand. Transponder key The transponder can be described as a key equipped with an electronic chip. The chip sends a signal when the key is inserted into the ignition. The car then checks to see whether the signal matches the one on the key. If the signals are in sync it will unlock and begin. This is a great way to prevent auto theft and keep your vehicle safe from thieves. Transponder keys may be a popular addition to automobiles, but they are not as safe as traditional keys made of metal. While the metal parts of a conventional key can be cut and copied, a transponder is protected by an electronic chip. This chip contains an unique code that is inserted into a car's computer order to identify it. The car will recognize the Saab keyfob, and allow it to turn on. The car will only recognize the key fob if it has an unmodified chip and programmed to match. Otherwise, the car will reject the key and won't start. It's essential to ensure that you have a spare key for your Saab. lost saab key is especially true when you live in a rural region that has numerous car thieves. You can get a new key for your Saab by going to the dealership without paying their high costs. In most instances, you can get an original key made on the spot at a fraction of the cost of what you would pay at the dealer. Key for Wired Saab cars are usually provided with two keys. If you only have one, it's recommended to purchase an additional key fob as quickly as you can since if you lose it the car will require a new CIM unit, and the locking cylinders will have to be replaced. This can be expensive, especially for used cars. The next step is to wire the row and column wires to the microcontroller. This is the toughest component of the project and it will require a lot of soldering. There is no standardized way to accomplish this, but it is essential to determine the way you'll route and solder the columns and rows. There are 22 microcontroller wires and pins to connect for this keyboard. It has five rows and 17 column. Once the rows and columns are soldered, it's the time to connect them to the key switches. To do this, you need to place an inverter over each pin of the key switch and then solder it. This will shield the pins from current, preventing them from being cut off. A diode only allows the current to flow in a single 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 that are sold in auto parts stores, such as the Autel MaxiIM IM608PRO or IM508 can assist customers shopping or DIY customers to program replacement keys and restore data from the immobilizer. The tools plug into the OBD port and guide the customer through the process, making it easier than replacing the computer in the vehicle. Jump starting the battery Most people keep an item in their trunks to start a vehicle in the event of an emergency, but it may not be the best idea for newer cars. They have numerous computers and digital devices that communicate with one another. A surge in voltage when a battery is connected to another could cause damage to the components and render your vehicle unusable. Connect the cables to the vehicle that is working. Let it run for two minutes. Attach the red clip to the positive terminal of the good battery. (It will say “POS” or “+”.) Attach the other end of the black cable to a clean, unpainted metal surface under the disabled car's hood. The engine block would be a good option. The black cable should not be connected to the negative terminal of the dead battery. This could result in sparks that could ignite the gasoline inside the engine compartment. After the cables have been connected, begin the car and let it run for approximately five minutes. Then, disconnect them in reverse. Remember that the battery on the Saab 9-3 will be charged when you drive, and it can take a while for the battery to go back to its original level. It's a good idea to purchase a spare fob as soon as you can, since replacing the one that works requires the installation of a new computer module and a special program to convince it that your lost keys aren't attempting to steal the car. Replacement Case Saab owners typically only have one car key, and if that is lost, they will be charged. The reason for this is that it's not cheap to add a new key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. It's recommended to have a spare key in the event of theft or other disaster, and the best way is to purchase an extra key as soon as you are able to. However, don't purchase a secondhand key, even when it's “new.” Keys that are claimed to be new from sellers selling aftermarket keys won't be effective and are almost guaranteed to fail at the crucial moment. The dealer will charge you the highest dollar if you have only one working key. We can, however, reset and re-program the computer's EEPROM in order to prepare it to accept a new key without replacing the entire system. This can help you save a significant amount of money. It's also less expensive than waiting until you lose your sole key.