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Saab Key Programming Saab cars made since 1994 come with an immobilizer system that is based on codes for keys. A new transponder is required to allow the addition of an extra key, and special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. The problem is that it can be very expensive. It is always advisable to keep a spare set of keys in your possession. Transponder key The transponder is a key equipped with an electronic chip. This chip sends out a signal when the key is inserted in the ignition. The car then analyzes the signal to see whether it is the same as that of the key. If the signals are the same it will open itself and start. This is a great method to protect your vehicle from theft. Transponder keys can be an extremely popular accessory for cars, but they're not as safe as traditional keys made of metal. The metal portion of a traditional key can be easily copied and cut, but transponders are protected by an electronic chip that protects it. This chip contains an unique code which is programmed into the car's computer in order to identify it. The car will recognize the Saab keyfob, and allow it to be turned on. The car will only recognize the key fob if it is equipped with an unmodified chip and has been programmed to match. The car will not start when the key isn't programmed to match. It is vital to have an extra Saab key. This is particularly important for those who live in a rural location where there are many car thieves. You can purchase a new key for your Saab by going to the dealership, without having to pay their pricey costs. You can have a replacement key created on the spot for less than half of the price you'd pay at a dealership. Wired key Saab cars are usually provided with two keys. If you only have one, it is recommended to get an extra key as soon as you can. This is because if it's lost and the car needs a new CIM and the locking cylinders replaced. This can be costly, especially for used cars. The next step is to connect the row and column wires to the microcontroller. This is the most tedious part of the project and it will require lots of soldering. There is no standardized way to accomplish this, but it is important to think about how you will route and solder the rows and columns. For this keyboard, there are 5 rows and 17 columns. This means there will be 22 microcontroller wires and pins to connect. After the columns and rows are soldered, it's time to connect them to key switches. Solder a diode to each key switch pin. This will protect the key switch pins from current and prevent them from being shorted. A diode lets current only flow in one direction. It has a visual indicator, a black band, that indicates which direction current will flow. Sanabria says that some of the tools available in auto parts stores, like the Autel MaxiIM IM608PRO and IM508 will assist shoppers or DIY users to program replacement keys and restore immobilizer information. The tools connect to OBD ports and help the customer through each step which makes the process much easier than replacing the vehicle's computer. Jumpstarting the battery A lot of people keep a set of jumper cables in their trunks in case of emergency however, jumping a battery for newer automobiles might not be the most efficient option. They have numerous computers and digital devices that communicate with each other. A surge in voltage when the battery is connected to another could cause damage to the components and render your car undriveable. Connect the cables to the vehicle operating. Let saab key code run for two minutes. Attach the red clip on the positive terminal of the good battery. (It will read “POS” or “+”.) Attach the other end of the black cable to an unpainted, clean metal surface underneath the vehicle's hood. An engine block is an ideal choice. The black cable is not to be connected to the negative terminal of the dead battery. This could result in a spark, which would ignite the gasoline in the engine compartment. After the cables have been connected, you need to start the vehicle and let it run for approximately five minutes. Then disconnect them in reverse. The battery in your Saab 9-3 will be recharged while you drive. It takes a while for it to return to its original state. You should consider purchasing a second key fob, as soon as possible. Replacing the only one that works requires the installation and programming of a new computer chip. Replacement Case Many 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 add a new key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, in addition to programming. In the event of theft, or any other calamity, it is best to have an extra key. Don't purchase a used key even it's “new.” Claimed-new keys from a second-hand store will not work and are almost guaranteed to fail in the most critical moment. Most locksmiths can't help you in the event that you only have one working key, and the dealer will charge top dollar to replace the computer in your car to make a new replacement. We can reset and reprogram the computer's EEEPROM in order to get it ready to accept a replacement key without the need to replace the entire system. This could save you a lot of money. It's also less expensive than waiting until you lose your one key.