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Saab Key Programming Saab cars built since 1994 use an immobilizer system that relies on a set of keys. A new transponder is required for addition of an additional key, and special programming. This is usually done at the dealer with a specialized Tech2 diagnostic tool. This can be expensive. Always 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 to the car when it is put into the ignition. The car will then check the signal to determine whether it is identical to the one on the key. If the signals are identical the car will then unlock itself and start. This is a fantastic way to protect your car from 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 portion of a traditional keys can be easily cut or copied, while transponders have an electronic chip that guards it. This chip contains an unique code that's programmed into a car's computers in order to identify it. The car will recognize the Saab keyfob and permit it to be turned on. However, it can only do this if the key fob has an unmodified chip that has been programmed to match the original. Otherwise, the car would reject the key and won't start. It is important to have an extra Saab key. This is especially true when you live in a rural location that has numerous car thieves. The good part is that you can obtain a replacement key for your Saab without having to go to a dealership and pay the high costs that they charge. In most cases, you can have a new key created on-the-spot at a fraction of the cost of what you'd pay at dealerships. Wired key Saab cars typically come with two keys upon purchase. If you have only one, it is best to acquire an additional key fob as soon as possible, because if you lose it the car will require a new CIM unit and the locking cylinders will need to be replaced. This can be costly 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 challenging part of the project and requires a significant deal of soldering. There's no standard way to do this, but it's important to plan out how you will route and solder the rows and columns. There are 22 microcontroller wires and pins to connect to this keyboard. It includes 5 rows and 17 columns. After the rows and column are soldered together then it's time to connect the key switches. Solder a diode on each key switch pin. This will shield the pins from current, thus preventing them from being shorted. A diode only allows the flow of current to be in one direction, and it has a black band visual indicator that indicates the direction current will flow. Sanabria states that a number of the tools sold in auto parts stores, such as the Autel MaxiIM IM608PRO and IM508 can assist shoppers or DIY users to program replacement keys and restore immobilizer information. saab 9-3 key fob programming G28 Car Keys into the OBD port and automatically guide the customer through the procedure, making it simpler 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 modern cars might not be the best idea. These vehicles are equipped with digital and computer systems that communicate with each other. A surge in voltage when batteries are connected to another can fry the components making your car unusable. Start the vehicle you are using and allow it to run for approximately two minutes before connecting the cables to the non-working one. Attach the red clip to the positive terminal of the good battery. (It will say “POS” or “+”.) Attach the other end of the black cable to an unpainted, clean metal surface underneath the disabled car's hood—the engine block is a good choice. Don't connect the black cable to the negative terminal of the dead battery as this could cause a spark that ignites the gasoline in the engine bay. After the cables have been connected, start the vehicle and let it run for approximately five minutes. Then disconnect the cables in reverse. The battery in your Saab 9-3 will be recharged as you drive. It takes a while for it to fall back. It is a good idea to buy a spare key fob as soon as you can, since replacing the sole working one requires the installation of a brand new computer module and special programming to convince it that your lost keys aren't in the process of trying to steal the car. Replacement case Many Saab owners have only one key for their vehicle and if they lose it, the cost will be. It's expensive to purchase the key and also requires replacing the CIM or TWICE for older models. In the event of theft, or any other catastrophe it is advisable to have an extra key. However, don't purchase a secondhand key, even it's “new.” Claimed-new keys from aftermarket sellers will not perform and are almost certain to fail in the most critical moment. The dealer will charge you the most expensive dollar if you only have one working key. We can reset and reprogram the EEEPROM of your computer to get it ready to accept a replacement key without having to replace the entire system. This could save you a lot of money. It's also a lot cheaper than waiting until you lose your sole key.