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Saab Key Programming Saab cars that were built prior to 1994 have an immobilizer system that is based on codes for keys. In order to add a second key, it requires the purchase of a new transponder as well as special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. It can be costly. This is why it is important to always have a spare key on hand. Transponder key The transponder is a key that is equipped with an electronic chip. This chip sends out a signal when the key is placed in the ignition. The car checks to see whether the signal is the same as the one on the key. If the signals match the car will then unlock and begin. G28 is a great way to avoid car theft and keep your vehicle secure from thieves. Transponder keys are an increasingly popular feature in automobiles, but you should be aware that they aren't as secure as classic metal keys. The metal part of the traditional keys can be easily copied and cut, but transponders are protected by an electronic chip which protects it. The chip contains a unique code that is programmed into a car's computer in order to identify it. The car will recognize the Saab keyfob and permit it to be turned on. But, it's only able to do so if the key fob has an unmodified chip that has been programmed to match the original. The car will not start when the key isn't programmed to match. It's important to make sure that you have a spare key for your Saab. This is particularly important when you live in a rural region where there are a lot of car thieves. You can get a new key for your Saab by going to the dealership and not paying their expensive prices. In the majority of cases, you can have an original key made on the spot at a fraction of the cost of what you would pay at the dealer. Wired key Saab cars are usually delivered with two keys. If you only have one, you should get an extra key as soon 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 costly especially for cars that are used. The next step is to wire the column and row wires to the microcontroller. This is the most challenging part of the project and will require a good amount of soldering. There isn't a standard way to accomplish this, however it is essential to determine the way you'll route and solder the columns and rows. There are 22 microcontroller wires as well as pins to connect to this keyboard. It has 5 rows and 17 column. Once the rows and columns are soldered, it's time to connect them to the key switches. To do this, you need to place a diode across each pin of the key switch and then solder it. This will protect the pins from current, preventing them from being shortened. The diode will only allow the current to flow in a single direction, and it comes with a the black band as a visual indicator that indicates the direction in which current will flow. Sanabria says that some of the tools offered in auto parts stores, like the Autel MaxiIM IM608PRO or IM508 will assist customers shopping or DIY customers to program replacement keys and restore the immobilizer's data. The tools plug into the OBD port and automatically guide the customer through the process, making it more simple than replacing the computer inside the vehicle. Jump-starting the battery A lot of people keep an assortment of tools in their trunks to jump-start a vehicle in an emergency, but it may not be the best idea for newer cars. They have numerous digital and computer systems that communicate with one another. A voltage spike when a battery is connected to another could cause damage to the components making your car unusable. Start the vehicle that is working and allow it to run for around two minutes before connecting the cables to the disabled one. Attach the red clip on the positive terminal of the battery that is good. (It will read “POS” or “+”.) Attach the other end to a clean, unpainted metal surface beneath the hood of the damaged car. The engine block is a good alternative. The black cable should not be connected to the negative terminal of the dead battery. This could create sparks, which could ignite the gasoline that is in the engine compartment. After the cables have been connected, start the car and let it run about five minutes. Then disconnect the cables in reverse. The battery in your Saab 9-3 is recharged while you drive. It takes a while for it to drop back down. It's a good idea buy a spare key fob as soon as you can, because replacing the only functioning one requires the installation of a new computer module and a special program to convince it that your missing keys aren't trying to steal the car. Replacement Case Many Saab owners have only one key for their car and if they lose it, the cost will be. The reason is that it's not inexpensive to replace a key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. In the event of theft, or any other disaster, it is best to have a spare key. However, don't purchase a secondhand key even if it's “new.” Keys that are claimed to be new from sellers selling aftermarket keys won't work and are almost guaranteed to fail at the crucial moment. The dealer will charge you top dollar for only 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 can save you a significant amount of money. It's also cheaper than waiting until you lose your sole key.