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Saab Key Programming Saab cars built since 1994 feature an immobilizer that relies on coded keys. A new transponder is required in order to enable the inclusion of an additional key, as well as special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. This can be expensive. It is always advisable to keep an extra set of keys on hand. Transponder key The transponder key is a piece of hardware with an electronic chip that sends a signal back to the car when it is put into the ignition. The car is able to check whether the signal is the same as the one on the key. If the signals match then the car will be able to unlock and begin. This is a great method to guard your car against theft. Transponder keys could be an extremely popular accessory for cars, but they are not as secure as traditional metal keys. While the metal parts of a traditional key can be cut and copied the transponder is protected by an electronic chip. The chip is equipped with an unique code that is embedded into the car's computer to identify it. The car will recognize the Saab keyfob and permit it to turn on. The car will only recognize the key fob if the device has an unmodified chip and programmed to match. The car won't start in the event that the key is not programmed to match. It is essential to have an extra Saab key. This is particularly true when you live in a rural area with numerous car thieves. The good part is that you can find a replacement key to your Saab without having to go to a dealer and pay the high prices that they ask. You can have a replacement key created on the spot at a fraction of the price you'd pay at a dealership. Key for Wired Saab cars are usually provided with two keys. If you own only one, you should purchase an additional key as fast as you can. This is because if you lose it and the car is damaged, it will require an entirely new CIM and the locking cylinders replaced. This can be expensive particularly for used cars. The next step is to connect the wires for columns and rows to your microcontroller. This is the most laborious component of the project and will require lots of soldering. There is no standard method to accomplish this, however it is essential to determine the way you'll route and solder the rows and columns. There are 22 microcontroller wires as well as pins to connect for this keyboard. It has 5 rows and 17 column. 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 key switch pins from current and prevent them from being shorted. A diode lets current only flow in only one direction. It has a visual indicator, a black band, that indicates the direction in which current will flow. Some of the tools available at auto parts stores- such as the Autel MaxiIM IM608 PRO and IM508 — may help shop customers or even DIY users in some cases replace keys in the program and restore lost immobilizer information, Sanabria says. The tools connect to OBD ports and guide the user through each step making the process simpler than replacing the vehicle's computer. Jumpstarting the battery Most people keep a set of jumper cables in their trunks for emergencies however, jumping a battery on modern vehicles may not be the most efficient option. These vehicles have many digital and computer systems that communicate with each other. A surge of voltage when the battery is connected to another one could cause damage to the parts making your car unusable. Connect saab 9-3 replacement key G28 Car Keys to the vehicle that is working. Allow it to 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 of the black cable to an unpainted, clean metal surface underneath the disabled car's hood. The engine block would be a good choice. Do not connect the black cable to the negative terminal of the dead battery as it could spark an ignition spark that ignites the gasoline in the engine bay. Once the cables are connected, turn on the vehicle you are not using and let it run for approximately five minutes before disconnecting the cables in reverse order. The battery in your Saab 9-3 will recharge while you drive. It may take a while it to drop back down. It is a good idea to buy a spare key fob as soon as you can, since replacing the one that works requires the installation of a new computer module and special programming to convince the system that your lost keys are not trying to steal the car. Replacement Case Many Saab owners have only one key for their car and if they lose it, key, it will cost them. The reason is that it's not cheap to add a new key, and this 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 a spare key. Even when the key is “new”, it will not function. Most locksmiths aren't able to help with a single working key, and the dealer will charge you top dollar to replace the computer in your car for a replacement. However, we can reset and re-program the computer's EEPROM in order to prepare it to accept the new key without having to replace the whole system. This can save you a lot of money. It's much cheaper instead of waiting until you loose the only key.