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Saab Key Programming Saab cars that were built prior to 1994 feature an immobilizer mechanism made up of coded keys. A new transponder is required in order to enable the addition of an extra key, as well as special programming. This is usually done by the dealer with a specialized Tech2 diagnostic tool. This can be expensive. This is why you should always have a spare key available. Transponder key The transponder keys are keys equipped with an electronic chip. It sends a signal back to the car when it is put into the ignition. The car then checks the signal to determine whether it is identical to the one on the key. If the signals are in sync it will open and start. This is a great way to protect your vehicle from theft. Transponder keys can be a popular addition to cars, but they are not as safe as traditional metal keys. The metal component of a traditional key can be easily cut and copied, however transponders are protected by an electronic chip that protects it. The chip has a unique code which is programmed into a car's computer order to identify it. The car will recognize the Saab keyfob and permit it to turn on. saab 9-3 key will only recognize the key fob if it is equipped with a chip that is unmodified and programmed to match. Otherwise, the car will reject the key and won't start. It is essential to ensure that you have a spare key for your Saab. This is particularly important when you live in a rural area where there are many car thieves. The good part is that you can find a new key for your Saab without having to go to an auto dealer and pay the high prices that they ask. You can get an original key made on the spot at a fraction of what you would pay at an auto dealer. Wired key Saab cars are usually delivered with two keys. If you have only one, it's best to acquire an additional key fob as soon as you can since if you lose it, your car will require the replacement of a CIM unit and the locking cylinders have to be replaced. This can be expensive particularly for used cars. The next step is to connect the wires for columns and row to your microcontroller. This is the most challenging part of the project and will require a large deal of soldering. There's no standard way to do this, but it's important to plan out the route you'll take and solder the columns and rows. There are 22 microcontroller wires and 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 on each key switch pin. This will shield the pins of the key switch from current and prevent them from being shorted. A diode permits current to only flow in only one direction. It is equipped with a visible indicator that is black, that shows which way current will flow. Sanabria says that some of the tools available in auto parts stores, such as the Autel MaxiIM IM608PRO and the IM508 are able to assist customers who are shopping or DIY users to program replacement keys and restore immobilizer information. The tools plug into the OBD port and automatically guide the user through the process, making it more simple than replacing the computer in the vehicle. Jump starting the battery The majority of people have a set in their trunks to jump-start their car in case of emergency, but it might not be the best option for vehicles with newer technology. These vehicles are equipped with numerous digital and computer systems that communicate with each other. A surge of voltage when a battery is connected to another could cause damage to the components and render your vehicle unusable. Start the working vehicle and let it run for about two minutes before connecting the cables to the disabled one. 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, unpainted metal surface underneath the hood of the damaged vehicle. The engine block is a great choice. Don't connect the black cable to the negative terminal of the dead battery, since this could cause an ignition spark that ignites the gasoline in the engine bay. Once the cables are connected, you can start the disabled vehicle and let it run for about five minutes before you disconnect the cables in reverse order. Remember that the battery on your Saab 9-3 is charged during your drive, which means it could take a while for the battery to go back to normal. It is recommended to purchase a second key fob, when you can. Replacing the only one that works requires the installation and programming of a brand new computer chip. Replacement Case Many Saab owners have only one key for their vehicle and if they lose it, it's going to cost them. The reason is that it's not cheap to add a new key, and it involves replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. It is recommended to have a spare key in case of theft or other disaster and the best option is to buy an extra key as soon as you are able to. Even if the key is “new” it won't work. The majority of locksmiths won't be able to help in the event that you only have one working key and the dealer will charge high fees to replace the computer in your car to make a new replacement. However, we can reset and re-program your computer's EEPROM to prepare it to accept the new key, without replacing the entire system. This can save you a lot of money. It's also a lot cheaper than waiting until you lose your sole key.