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Saab Key Programming Saab cars that were built prior to 1994 have an immobilizer feature built on coded keys. A new transponder is required for the addition of a second key, as well as special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. The issue is that it can be extremely expensive. You should always keep a spare set of keys available. Transponder key The transponder is a type of key that has an electronic chip. The chip sends a signal when the key is inserted in the ignition. The car then analyzes the signal to see whether it matches the one in the key. If the signals match, the car will unlock and start. This is a great way to avoid car theft and keep your car safe from thieves. Transponder keys are an increasingly popular feature in cars, but you should be aware that they're not as secure as classic keys made of metal. The metal component of a traditional key is easily cut and copied, however transponders have an electronic chip that protects it. The chip contains a unique code that is inserted into the car's computer in order to identify it. The car will recognize the Saab keyfob and permit it to be turned on. However, it is only able to do this if your key fob is equipped with a chip that is not modified that has been programmed to match it. If not, the car will reject the key and refuse to start. It's essential to ensure that you have a spare key for your Saab. This is especially important for those who live in a rural location where there are many car thieves. You can get a brand new key for your Saab by going to the dealership, without having to pay their pricey costs. You can have an original key made on the spot for less than half the cost you would spend at dealerships. Wired key Saab cars are usually provided with two keys. If you only have one, you should purchase an extra key as soon as you can. This is because if it's lost and the car needs a new CIM and the locking cylinders replaced. This can be costly especially if buying a second-hand car. The next step is to wire the row and column wires to the microcontroller. This is the most difficult part of the project and it will require lots of soldering. There's no standard way to go about it, however, you should plan how to route and solder each column and row. There are 22 microcontroller wires as well as pins to connect to this keyboard. It includes 5 rows and 17 column. After the columns and rows are soldered together, it is time to connect the key switches. Solder a diode on each key switch pin. This will shield the pins of the key switch from current and prevent them from being shorted. A diode permits current to only flow in one direction. It has a visual indicator that is black, that shows which way current will flow. A few of the tools that are available at auto parts stores — such as the Autel MaxiIM IM608 PRO and IM508 — could help customers in the shop, or even DIY users in some cases replace keys in the program and restore lost immobilizer data Sanabria says. The tools connect to the OBD port and guide the customer through the process, making it easier than replacing the computer inside the vehicle. Jump-starting the battery A lot of people keep a set in their trunk to jump-start a car in an emergency, but this might not be a good idea for cars with more modern technology. These vehicles have many digital and electronic devices that communicate with one another. A surge in voltage when the battery is connected to another can fry these components, rendering your vehicle undriveable. Start the vehicle that is working and allow it to run for approximately two minutes before you connect the cables to the non-working one. Attach the red clip to the positive terminal of the battery that is good (it will have “POS” or “+” on it). Attach saab 9-3 key of the black cable to a clean, unpainted metal surface underneath the disabled 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 result in sparks, which would ignite gasoline in the engine compartment. 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 may take some time for the battery to go back down again. You should purchase 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 Many Saab owners have only one key for their vehicle and if they lose that key, it will cost them. It's expensive to add keys and will require replacing the CIM or TWICE in the case of older models. It's recommended to have a second key in case of theft or other disaster, and the best way is to purchase an additional key as quickly as you can. Don't purchase a used key, even if it's “new.” Keys that are claimed as new from sellers selling aftermarket keys won't be effective and are almost guaranteed to fail in the crucial moment. The dealer will charge you the most expensive dollar if you have only one working key. However, we can reset and re-program the computer's EEPROM to prepare it to accept the new key without having to replace the entire system. This can save you a significant amount of money. It's also less expensive than waiting until you lose the only key.