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Saab Key Programming Saab cars that were built prior to 1994 have an immobilizer feature that is based on codes for keys. A new transponder is required for the addition of an additional key, and special programming. This is usually done by the dealer using a special Tech2 diagnostic tool. It can be costly. It is recommended to always have a spare set of keys on hand. Transponder key The transponder keys are keys with an electronic chip that sends a signal to car when it is inserted into ignition. The car then checks the signal to determine whether it matches the one in the key. If the signals match then the car will be able to unlock and start. This is a great way to protect your vehicle from theft. Transponder keys are a common feature in cars, but you should be aware that they aren't as secure as traditional keys made of metal. The metal component of a traditional key is easily cut and copied, however the transponder is protected by an electronic chip that guards it. The chip contains a unique code that is programmed into a car's computer order 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 the key fob is equipped with a chip that is not modified that has been programmed to match. The car will not start if the key is not programmed to match. It is crucial to have a spare Saab key. This is especially important if you live in a rural area, where there are numerous car thieves. You can get a brand new key for your Saab by going to the dealership and not paying their high prices. In most cases, you can have an original key made on the spot for less than half the price of what you would pay at the dealer. Key for Wired Saab cars are typically delivered with two keys. If you only have one, it's an ideal idea to purchase an additional key fob as quickly as you can, because if you lose it, the car will require a new CIM unit and the locking cylinders have to be replaced. This can be expensive especially for cars that are used. The next step is to wire the column and row wires to the microcontroller. This is the most laborious part of the project, and will require lots of soldering. There isn't a standard method to do it, but you should consider how you will connect and solder each column and row. For this keyboard, there are five rows and 17 columns, which means there will be 22 microcontroller pins and wires to connect. After the columns and rows are soldered together then it's time to connect the key switches. Solder a diode on each key switch pin. This will shield the pins from current, preventing them from being shorted. A diode only allows the current to flow in a single direction, and it also has a the black band as a visual indicator that shows the direction in which current will flow. Sanabria says that some of the tools offered in auto parts stores, like the Autel MaxiIM IMM608PRO and IM508 can assist customers who are shopping or DIY customers to program replacement keys and restore the immobilizer's data. The tools connect to the OBD port and guide the customer through the procedure, making it much easier than replacing the computer inside the vehicle. Jumpstarting the battery Most people keep a set of jumper cables in their trunk for emergency situations, but jumping a battery in newer automobiles might not be the best option. These cars are equipped with a variety of digital and computers that communicate with one another. A surge in voltage when a battery is connected to another one could cause damage to the parts, rendering your car undriveable. Connect TheKeyLab to the vehicle working. Let it run for two minutes. Attach the red clip to the positive terminal of the good battery (it will have “POS” or “+” on it). Attach the other end to a clean and unpainted metal surface under the hood of the affected car. The engine block is a good alternative. The black cable is not to be connected to the negative terminal of the dead battery. This could cause sparks that 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. The battery in your Saab 9-3 is recharged as you drive. It will take a while for it to return to its original state. It is a good idea to invest in a spare key fob as soon as you can, because replacing the one that works requires the installation of a new computer module and a special program to convince the system that your lost keys aren't attempting to steal the car. Replacement case Saab owners usually have only one car key, and if that is lost, they'll be charged. It's costly to add keys and will require replacing the CIM or TWICE in the case of older models. It's best to have a spare key in the event of theft or any other catastrophe, and the best way is to purchase an additional key as soon as you are able to. But don't buy a used key even when it's “new.” Claimed-new keys purchased from third-party sellers won't work and are likely to fail at the crucial moment. The dealer will charge you the highest dollars if you only have one working key. We can reset and reprogram the computer's EEEPROM to get it ready to accept a new key without having to replace the entire system. This can help you save a significant amount of money. It's also a lot cheaper than waiting until you lose your one key.