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Saab Key Programming Saab cars built since about 1994 have an immobilizer system that is based on codes for keys. A new transponder is required for addition of an additional key, as well as special programming. This is usually done at the dealer using a Tech2 diagnostic tool. The problem is that this could be extremely expensive. This is why it is important to always have a spare key available. Transponder key The transponder key comes with an electronic chip that sends a signal to the car when it is inserted into the ignition. The car then checks the signal to see whether it is identical to the one on the key. If both signals match it will open itself and start. This is a great method to guard your car against theft. Transponder keys may be an increasingly popular feature for cars, but they're not as safe as traditional keys made of metal. The metal component of the traditional key is easily copied and cut, but a transponder has an electronic chip which protects it. This chip contains a unique code that is programmed into the car's computer to identify it. The car will recognize the Saab keyfob and allow it to turn on. However, it can only do this if your key fob has an unmodified chip that has been programmed to match. saab keys will not start if the key is not programmed to match. It's essential to ensure that you have a spare key for your Saab. This is particularly true for those who live in a rural location that has many car thieves. The good part is that you can get a replacement key for your Saab without needing to visit a dealer and pay the high prices they ask. You can have the replacement key on the spot for less than half what you would spend at a dealership. Wired key Saab cars typically come with two keys upon purchase. If you have only one, it's an ideal idea to purchase an extra key fob as soon as possible in case you lose it the car will require the replacement of a CIM unit and the locking cylinders will have to be replaced. This can be expensive especially for cars that are used. The next step is to wire the wires for the column and row to the microcontroller. This is the most laborious part of the project, and will require a lot of soldering. There is no standardized way to do this, but it is important to think about how you will 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 the key switches. Solder a diode to each key switch pin. This will protect the pins from current, thus preventing them from getting shorted. A diode allows current to only flow in one direction. It has a visual indicator with a black band that shows which way current will flow. Sanabria states that a number of the tools available in auto parts stores, like the Autel MaxiIM IM608PRO and IM508 can assist customers shopping or DIY users to program replacement keys and restore immobilizer data. The tools plug into the OBD port and guide the customer through the process, making it more simple than replacing the computer inside the vehicle. Jump starting the battery The majority of people have an item in their trunks to jump-start a car in an emergency, however it might not be the best idea for vehicles that are newer. These vehicles are equipped with many digital and computer systems that communicate with one another. A surge of voltage when the battery is connected another could cause damage to the components making your car unusable. Connect the cables to the vehicle working. Let it run for two minutes. Attach the red clip on the positive terminal of the battery that's good. (It will say “POS” or “+”.) Attach the other end of the black cable to a clean, unpainted metal surface beneath the damaged car's hood. The engine block is an excellent choice. Don't connect the black cable to the negative terminal of the dead battery as it could ignite an ignition spark that ignites the gasoline in the engine bay. After the cables have been connected, you need to begin the car and allow it to run for around five minutes. Then disconnect them in reverse. The battery in your Saab 9-3 is recharged while you drive. It will take a while for it to return to its original state. You should invest in a second key fob, when you can. Replacing the original 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 the cost will be. The reason for this is that it's costly to purchase a new key, and it 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 an extra key. Even if the key is “new” it won't work. Most locksmiths aren't able to help in the event that you only have one working key and the dealer will charge you high prices to replace the computer in your vehicle to create a replacement. We can, however, reset and reprogram the computer's EEPROM to accept the new key without having to replace the entire system. This can save you a significant amount of money. It's less expensive than wait until you lose your only key.