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Saab Key Programming Saab cars built since about 1994 have an immobilizer system that is based on codes for keys. A new transponder is required for inclusion of an additional key, and special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. The issue is that it can be extremely expensive. This is the reason why you should always have a spare key on hand. Transponder key The transponder key comes with an electronic chip that sends a signal back to the car when it is inserted into ignition. The car then checks to see if the signal matches the one on the key. If the signals are in sync the car will then open and start. This is a great way to stop auto theft and keep your vehicle safe from thieves. Transponder keys are a popular feature in automobiles, but it is important to know that they are not as secure as traditional metal keys. While the metal component of a traditional key may be cut and copied, a transponder is protected by an electronic chip. This chip contains a unique code that is embedded 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. The car can only recognize the key fob if it is equipped with an unmodified chip and has been programmed to match. The car will not start if the key is not programmed to match. It's essential to ensure that you have an extra key for your Saab. This is particularly important if you reside in a rural location that has many car thieves. The good news is that it's possible to get a replacement key for your Saab without needing to visit a dealer and pay the high prices that they ask. In most cases, you can have a brand new key made right on the spot at a fraction of the price of what you would pay at a dealer. Key for Wired Saab cars are usually provided with two keys. If you have only one, you should purchase an additional key as quickly as you can. This is because if you lose it the car will require a new CIM and the locking cylinders replaced. This could be expensive especially if you're purchasing a used car. The next step is to wire the column and row wires to the microcontroller. This is the toughest part of the project, and will require lots of soldering. saab 9-3 key replacement 's not a common way to do it, but you must determine how to connect and solder each column and row. For this keyboard, there are five rows and 17 columns. This means there will be 22 microcontroller wires and pins that you need to connect. After the columns and rows are joined It is now time to connect the key switches. To do this you must place a diode on each key switch pin and then solder it. This will shield the pins from current and prevent them from being shortened. A 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. Some of the tools offered at auto parts stores- such as the Autel MaxiIM IM608 Pro and IM508 — may help customers in the shop, or even DIY customers in certain instances programme replacement keys and recover lost immobilizer information, Sanabria says. The tools plug into OBD ports and guide the user through each step making the process simpler than replacing the car's computer. Jump-starting the battery Most people keep a set of jumper cables in their trunk for emergency situations however, jumping a battery on newer vehicles may not be the best choice. These vehicles have many computers and digital devices that communicate with each other. A surge in voltage while a battery is hooked up to another could cause damage to the components and render your car undriveable. 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 have “POS” or “+” on it). Attach the other end to a clean, unpainted metal surface underneath the hood of the damaged car. The engine block is a great alternative. Do not connect the black cable to the negative terminal on the dead battery, as it could ignite an ignition that ignites the gasoline in the engine bay. Once the cables are connected, you can start the vehicle and let it run for about five minutes. Then, disconnect the cables in reverse. The battery in the Saab 9-3 will charge while you drive. It takes a while for it to fall back. You should invest in an additional key fob as soon as possible. Replacing the only one that works requires the installation and programming of a new computer chip. Replacement Case Saab owners typically only have one car key, and if it is lost, they'll be charged. It's costly to add the key and also requires replacing the CIM or TWICE for older models. In the event of theft, or any other disaster it is advisable to have an extra key. But don't buy a used key even if it's “new.” Keys that are claimed as new from sellers selling aftermarket keys won't perform and are almost certain to fail at the critical moment. The dealer will charge the highest dollar if you only have one working key. We can, however, reset and re-program your computer's EEPROM in order to prepare it to accept a new key without replacing the whole system. This can save you a great deal of money. It's also cheaper than waiting until you lose the only key.