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Saab Key Programming Saab cars built since 1994 use an immobilizer system that is based on coded keys. A new transponder is required to allow the addition of an additional key, and special programming. This is usually done by the dealer using the Tech2 diagnostic tool. It can be costly. It is always advisable to keep a spare set of keys on hand. Transponder key The transponder can be described as a key that is equipped with an electronic chip. This chip sends a signal when the key is put in the ignition. The car is able to check whether the signal matches with the one on the key. If the signals are the same it will open itself and begin. This is a fantastic way to protect your car from theft. Transponder keys are an increasingly popular feature in automobiles, but you should be aware that they are not as secure as traditional keys made of metal. The metal component of the traditional keys can be easily cut or copied, while transponders have an electronic chip that safeguards it. This chip contains an unique code that is inserted into a car's computers in order to identify it. The car will recognize the Saab keyfob, and allow it to be turned on. However, it will only do this if your key fob is equipped with a chip that is not modified that has been programmed to match it. In the absence of that, the car will reject the key and won't start. It is vital to have an extra Saab key. This is especially important for those who live in a rural area with numerous car thieves. You can purchase a new key for your Saab by visiting the dealership, without having to pay their pricey costs. You can get an original key made on the spot for less than half of the price you'd spend at dealerships. Key for Wired Saab cars typically come with two keys when new. If you own only one, you need to purchase an extra key as soon as you can. This is because if it's lost, the car will need a new CIM and the locking cylinders replaced. This can be costly especially if you're buying a second-hand car. The next step is to connect the wires for the column and row to the microcontroller. This is the most tedious part of the project and will require lots of soldering. It's not a common way to go about it, but you must consider how you will route and solder each column and row. For this keyboard, there are five rows and 17 columns. So there will be 22 microcontroller wires and pins that you need to connect. Once the rows and columns are soldered, it's time to connect them to key switches. To do this you must place a diode across each pin on the key switch and solder it. This will protect the pins from current and prevent them from being cut off. The diode allows current to only flow in one direction. It is equipped with a visible indicator that is black, that shows which way current will flow. Sanabria says that a few of the tools offered in auto parts stores, such as the Autel MaxiIM IMM608PRO and IM508 are able to assist customers shopping or DIY users to program replacement keys and restore immobilizer information. 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. Jump starting the battery Most people keep a set in their trunks to jump-start their vehicle in an emergency, but it might not be a good idea for newer cars. They have numerous computers and digital devices that communicate with one another. A surge in voltage when a battery is hooked up to another battery could fry these components and leave your vehicle undriveable. Connect the cables to the vehicle working. Allow it to run for two minutes. Attach the red clip on the positive terminal of the good battery. (It will say “POS” or “+”.) Attach the other end to a clean unpainted metal surface underneath the hood of the disabled vehicle. The engine block is a great alternative. Do not connect the black cable to the negative terminal of the dead battery because it could ignite an ignition spark that ignites the gasoline in the engine bay. Once the cables are connected, start the vehicle that is disabled and let it run for about five minutes before disconnecting the cables in reverse order. Remember that the battery on the Saab 9-3 will be charged when you drive, and it could take a while to get the battery back down again. It is a good idea to buy a spare key fob as soon as you can, since replacing the only working one requires the installation of a new computer module and a special program to convince the system that your lost keys are not trying to steal the car. Replacement Case Saab owners typically only have one car key, and if that is lost, they will be charged. It's expensive to purchase an additional key and it requires replacing the CIM or TWICE in the case of older models. In the event of theft or any other catastrophe it is best to have an extra key. Don't buy a secondhand key, even it's “new.” Claimed-new keys from a second-hand store will not be effective and are almost guaranteed to fail at the critical moment. G28 Car Keys will charge you the most expensive dollar if you have only one working key. We can, however, reset and re-program the computer's EEPROM to accept an alternative key without replacing the entire system. This could save you a lot of money. It's also cheaper than waiting until you lose your one key.