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Saab Key Programming Saab cars produced since 1994 feature an immobilizer system that is based on coded keys. To add an additional key, you need a new transponder, as well as special programming. This is usually done at the dealer using a special Tech2 diagnostic tool. This can be expensive. It is always advisable to keep an extra set of keys in your possession. Transponder key The transponder keys are keys equipped with an electronic chip. It sends a signal to car when it is inserted into the ignition. The car checks to see whether the signal matches the one on the key. If the signals match the car will be able to unlock itself and start. This is a great method to avoid auto theft and keep your car secure from thieves. Transponder keys may be a popular addition to cars, but they are not as safe as traditional metal keys. While the metal part of a traditional key could be cut and copied, a transponder is protected by an electronic chip. The chip has a unique code that is encoded into the car's system to identify it. The car will recognize the Saab keyfob and allow it to be turned on. The car will only recognize the key fob if it has an unmodified chip and programmed to match. If not, the car will reject the key and not start. It's crucial to ensure that you have a spare key for your Saab. This is particularly important when you live in a rural region that has numerous car thieves. You can purchase a new key for your Saab by visiting the dealership without paying their high prices. In most cases, you can have a new key created on-the-spot at a fraction of the cost you would pay at the dealer. Wired key Saab cars usually come with two keys when new. If you have only one, it is best to acquire an extra key fob as soon as is possible in case you lose it, your car will require the replacement of a CIM unit, and the locking cylinders will have to be replaced. This can be expensive, especially for used cars. The next step is to connect the wires for the column and row to the microcontroller. This is the most tedious component of the project and it will require a lot of soldering. There is no standard method to accomplish this, however it is crucial to plan the route you'll take and solder the columns and rows. For this keyboard, there are five rows and 17 columns. This means there will be 22 microcontroller pins and wires to connect. After the columns and rows are soldered together after which it is time to connect the key switches. To do this you must place a diode over each key switch pin and solder it. This will protect the pins from current, and prevent them from being shortened. A diode allows the flow of current to be in one direction, and it comes with a an indicator of black color that indicates which way the current will flow. Sanabria states that a number of the tools offered in auto parts stores, including the Autel MaxiIM IMM608PRO and IM508 will assist shoppers or DIY users to program replacement keys and restore immobilizer data. The tools connect to OBD ports and help the customer through each step and make the process more straightforward than replacing the vehicle's computer. Jumpstarting the battery A lot of people keep an assortment of tools in their trunks to jump start a vehicle in an emergency, but it might not be the best idea for cars with more modern technology. These cars have a variety of digital and electronic devices that communicate with each other. A surge in voltage while the battery is connected to another could cause damage to the components and render your vehicle unable to drive. Start the working vehicle and allow it to run for around two minutes before you connect the cables to the disabled one. Attach the red clip on the positive terminal of the battery that's good. ( saab keys replacement will read “POS” or “+”.) Attach the other end of the black cable to an unpainted, clean metal surface beneath the damaged car's hood. The engine block would be a good option. Don't connect the black cable to the negative terminal of the dead battery as it could spark an ignition source that ignites gasoline in the engine bay. After the cables have been connected, begin the car and let it run for about five minutes. Then disconnect them in reverse. The battery in the Saab 9-3 will charge 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 sole working one requires the installation of a 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 Saab owners often only have one car key, and if it is lost, they'll be charged. The reason for this is that it's expensive to buy a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, in addition to programming. In the event of theft or any other catastrophe, it is best to have a spare key. But don't buy a used key even it's “new.” Keys that are claimed to be new from a second-hand store will not work and are likely to fail in the most critical moment. The dealer will charge you the highest dollar if you have only one working key. We can, however, reset and reprogram the computer's EEPROM in order to prepare it to accept an alternative key without replacing the whole system. This could save you a lot of money. It's less expensive instead of waiting until you lose the only key.