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Saab Key Programming Saab cars built since 1994 utilize an immobilizer system that is based on a set of keys. A new transponder is required for addition of an additional key, and special programming. This is usually done by the dealer using the Tech2 diagnostic tool. The problem is that it can be very expensive. This is why it is important to always have a spare key at hand. Transponder key The transponder is a piece of key equipped with an electronic chip. The chip sends a signal when the key is placed in the ignition. The car then checks to see whether the signal is the same as the one on the key. If the signals are the same the car will then unlock itself and begin. This is a great way to prevent car theft and keep your car safe from thieves. Transponder keys may be a popular addition to cars, but they are not as safe as traditional metal keys. The metal portion of a traditional key can easily be cut and copied, however a transponder has an electronic chip that safeguards it. This chip contains an unique code that's programmed into the car's computer in order to identify it. The car will recognize the Saab keyfob and allow it to turn on. However, it is only able to do so if the key fob is unmodified and has a chip that has been programmed to match. In the absence of that, the car will reject the key and won't start. It is essential to have a spare Saab key. This is particularly important if you live in a rural area 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 pricey prices. In most instances, you can get an original key made on the spot for less than half the cost of what you would pay at an auto dealer. Wired key Saab cars typically come with two keys when they're new. 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 needs an entirely new CIM and the locking cylinders replaced. This can be costly especially for cars that are used. The next step is to connect the wires of the column and row to the microcontroller. This is the most challenging part of the project and will require a great deal of soldering. There's no standard way to do it, but you should plan how to route and connect each column and row. There are saab replacement key programming and pins that you can connect to this keyboard. It has 5 rows and 17 columns. Once the rows and columns are soldered, it's the time to connect them to the key switches. To do this, put a diode over each pin on the key switch and then solder it. This will protect the key switch pins from current and prevent them from being shorted. A diode lets current only flow in one direction. It features a visual indicator, a black band, that shows the direction in which the current will flow. Sanabria says that some of the tools that are sold in auto parts stores, such as the Autel MaxiIM IM608PRO and the IM508 are able to assist shoppers or DIY customers to program replacement keys and restore data from the immobilizer. The tools plug into the OBD port and automatically guide the customer through the process, making it easier than replacing the computer inside the vehicle. Jump starting the battery Most people keep a few sets of jumper cables in their trunk in case of emergency however, jumping a battery on newer vehicles might not be the most efficient option. These vehicles are equipped with many digital and computers that communicate with one another. A voltage surge when a battery is connected to another can fry the components making your car unusable. Start the vehicle that is working and allow it to run for around two minutes before you connect the cables to the battery that is not working. Attach the red clip to the positive terminal on the good battery (it will have “POS” or “+” on it). Attach the other end of the black cable to an unpainted, clean metal surface under the disabled car's hood. The engine block would be an excellent choice. Don't connect the black cable to the negative terminal of the dead battery as this could trigger an ignition that ignites the gasoline in the engine bay. Once the cables are connected, you can start the vehicle that is disabled and allow it to run for around five minutes before you disconnect them in reverse order. The battery in your Saab 9-3 will recharge as you drive. It will take a while for it to fall back. It is a good idea to purchase a spare key fob as soon as you can, because replacing the only functioning one requires the installation of a new computer module and special programming to convince it that the lost keys are not trying to steal the car. Replacement case Many Saab owners have only one key for their vehicle and if they lose that it's going to cost them. The reason is that it's costly to purchase a new key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, and programming. It is best to have a spare key in the event of theft or any other catastrophe the best solution is to purchase an extra key as soon as you are able to. Even if the key is “new” it will not work. The majority of locksmiths won't be able to help if you have only one working key and the dealer will charge you top dollar to replace the computer in your car for a replacement. We can, however, reset and re-program the computer's EEPROM to prepare it to accept an alternative key without replacing the entire system. This can save you a lot of money. It's also much less expensive than waiting until you lose your one key.