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Saab Key Programming Saab cars produced since 1994 utilize an immobilizer that relies on key codes. To add an additional key, you need an entirely new transponder and programming. This is usually done by the dealer using a Tech2 diagnostic tool. The issue is that it can be quite costly. This is why you should always have a spare key on hand. Transponder key The transponder key is a piece of hardware with an electronic chip that transmits a signal to the car when it is put into the ignition. The car then examines the signal to determine whether it matches the one in the key. If the signals are in sync it will unlock and begin. This is a great way to avoid auto theft and keep your vehicle secure from thieves. Transponder keys are an extremely popular accessory for cars, but they're not as secure as traditional keys made of metal. While the metal part of a traditional key may be cut and copied however, a transponder is secured by an electronic chip. The chip contains a unique code that's programmed into a car's computer in order to identify it. The car will recognize the Saab keyfob and permit it to be turned on. The car will only recognize the key fob if it has a chip that is unmodified and programmed to match. The car won't start if the key is not programmed to match. It is essential to have a spare Saab key. This is especially important especially if you live in a rural area that is home to many car thieves. You can get a new key for your Saab by going to the dealership, without having to pay their expensive cost. In the majority of instances, you can get an original key made on the spot at a fraction of the cost of what you'd pay at dealerships. Key for Wired Saab cars usually come with two keys when they are new. If you only have one, it's an ideal idea to purchase an additional key fob as soon as possible as if you lose it, the car will require the replacement of a CIM unit, and the locking cylinders need to be replaced. This can be costly particularly if you are buying a second-hand car. The next step is to wire the column and row wires to the microcontroller. This is the most difficult part of the project and requires a significant deal of soldering. There is g28carkeys.co.uk standardized way to accomplish this, but it's important to plan out the route you'll take and solder the columns and rows. There are 22 microcontroller pins and wires to connect to this keyboard. It includes 5 rows and 17 columns. After the columns and rows are soldered, it's the time to connect them to key switches. Solder a diode to each key switch pin. This will protect the pins from current, preventing them from being shorted. A diode can only allow the flow of current to be in one direction, and it comes with a an indicator of black color that indicates the direction current will flow. Sanabria states that some of the tools sold in auto parts stores, including the Autel MaxiIM IM608PRO and the IM508 are able to assist customers shopping or DIY users to program replacement keys and restore immobilizer information. The tools connect to the OBD port and guide the user through the procedure, making it much easier than replacing the computer inside the vehicle. Jump-starting the battery The majority of people have a set of jumper cables in their trunk for emergencies however, jumping a battery on modern automobiles might not be the best choice. These vehicles have many digital and computer systems that communicate with one another. A surge in voltage when the battery is connected another can fry the components and render your vehicle unusable. Connect the cables to the vehicle that is operating. Let it run for two minutes. Attach the red clip to the positive terminal of the good battery (it will have “POS” or “+” on it). Attach the other end to a clean unpainted metal surface beneath the hood of the affected vehicle. The engine block is an excellent choice. Do not connect the black cable to the negative terminal of the dead battery because this could trigger an ignition source that ignites gasoline in the engine bay. Once the cables are connected, you should start the car and let it run about five minutes. Then disconnect the cables in reverse. Be aware that the battery of the Saab 9-3 gets recharged when you drive, and it will take a while for the battery to go down. It's a good idea buy a spare key fob as soon as you can, since replacing the only functioning one requires the installation of a brand new computer module and a special program to convince it that your lost 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 they'll be charged. The reason is that it's costly to purchase a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, in addition to programming. It is best to have a second key in the event of theft or other disaster and the best option is to purchase a second key as early as you can. Even even if the key is “new”, it will not function. Most locksmiths can't help you if you have only one working key, and the dealer will charge you high prices to replace the computer in your vehicle to create a replacement. We can, however, reset and reprogram the computer's EEPROM to prepare it to accept the new key, without replacing the entire system. This can save you a great deal of money. It's also less expensive than waiting until you lose the only key.