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Saab Key Programming Saab cars manufactured since 1994 feature an immobilizer that relies on key codes. A new transponder is required for the inclusion of an additional key, as well as special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. The problem is that this can be extremely expensive. This is the reason why you should always have a spare key at hand. Transponder key The transponder keys are keys with an electronic chip that sends a signal back to the car when it is placed in the ignition. The car checks to see whether the signal matches the one on the key. If the signals are in sync it will unlock and begin. This is a great way to protect your car from theft. Transponder keys could be an increasingly popular feature for automobiles, but they are not as safe as traditional keys made of metal. While the metal parts of a traditional key may be cut and copied, a transponder is protected by an electronic chip. The chip is equipped with a unique code programmed into the car's computer to identify it. When a Saab key fob is used, the car recognizes it and allows it to turn on. However, it is only able to do this if the fob has a non-modified chip that has been programmed to match the original. The car won't start in the event that the key is not programmed to match. It's crucial to ensure that you have an extra key for your Saab. This is especially true especially if you live in a rural area with 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 prices that they demand. In most instances, you can get a brand new key made right on the spot at a fraction of the price of what you'd pay at a dealer. Wired key Saab cars typically come with two keys when they are new. If you have only one, it is recommended to purchase an additional key fob as soon as possible as if you lose it the car will require a new CIM unit and the locking cylinders need to be replaced. This can be costly, especially if you are buying a second-hand car. The next step is to connect the row and columns wires to your microcontroller. This is the most difficult part of the project and requires a significant amount of soldering. There isn't a standard method to do it, but you must determine how to connect and solder each column and row. There are 22 microcontroller wires as well as pins to connect for this keyboard. It has 5 rows and 17 columns. 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 shield the pins that are used for key switches from current and stop them from being shorted. A diode lets current only flow in only one direction. It is equipped with a visible indicator of a black line that shows the direction in which the current will flow. Sanabria says that a few of the tools offered in auto parts stores, such as the Autel MaxiIM IM608PRO and IM508 will assist shoppers or DIY customers to program replacement keys and restore immobilizer data. The tools connect to OBD ports and help the customer through each step making the process simpler than replacing the car's computer. Jump-starting the battery Most people keep a few sets of jumper cables in their trunks for emergencies, but jumping a battery on newer vehicles may not be the best option. These vehicles are equipped with computers and digital devices which communicate with each other. A surge of voltage when a battery is connected to another can fry the components making your car unusable. Connect the cables to the vehicle working. Allow it to run for two minutes. Attach how to open a saab 93 without a key to the positive terminal of the battery that's good. (It will read “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 a good choice. The black cable should not be connected to the negative terminal of the dead battery. This could create sparks, which could ignite the gasoline inside the engine compartment. After the cables have been connected, start the vehicle and let it run about five minutes. Then disconnect them in reverse. The battery in your Saab 9-3 will recharge while you drive. It takes a while for it to return to its original state. It's a good idea to invest in 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 missing keys aren't attempting 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. It's costly to add the key and also requires replacing the CIM or TWICE in the case of older models. It is recommended to have a spare key in case of theft or any other catastrophe and the best option is to purchase a second key as soon as you can. Even when the key is “new” it will not work. Most locksmiths aren't able to help in the event that you only have one working key, and the dealer will charge you for the cost of replacing the computer in your vehicle for a replacement. We can reset and reprogram the computer's EEEPROM for it to accept a replacement key without replacing the entire system. This can save you a lot of money. It's cheaper to do this rather than wait until you lose the only key.