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Saab Key Programming Saab cars made since 1994 utilize an immobilizer that relies on keys that are coded. A new transponder is required for addition of a second key, and special programming. This is usually done at the dealer using a Tech2 diagnostic tool. The problem is that it can be quite costly. This is why it is important to always have a spare key at hand. Transponder key The transponder is a key that has an electronic chip. how to program saab 9-3 key fob The Key Lab sends out a signal when the key is put in the ignition. The car will check to see if the signal matches the one on the key. If the signals match then the car will be able to unlock and begin. This is a great way to deter car theft and keep your vehicle secure from thieves. Transponder keys are a popular feature in cars, but you should be aware that they're not as secure as classic keys made of metal. While the metal parts of a traditional key can be cut and copied but a transponder key is protected by an electronic chip. The chip has a unique code that's programmed into a car's computers in order to identify it. The car will recognize the Saab keyfob and allow it to be turned on. The car can only recognize the key fob if the device has a chip that is unmodified and has been programmed to match. If not, the car will reject the key and refuse to start. It is essential to have an extra Saab key. This is especially true if you live in a rural area, where there are many car thieves. The good news is that it's possible to obtain a replacement key for your Saab without needing to visit an auto dealer and pay the high prices that they ask. You can get the replacement key on the spot for less than half what you would pay at dealerships. Wired key Saab cars are usually supplied with two keys. If you have only one, it's an ideal idea to purchase an extra key fob as soon as you can as if you lose it, the car will require a new CIM unit and the locking cylinders will need to be replaced. This can be costly especially if buying a used car. The next step is connecting the wires for columns and row to your microcontroller. This is the most difficult aspect of the project and it will require a lot of soldering. There isn't a standard method to go about it, but you should plan how to route and connect each column and row. There are 22 microcontroller pins and wires to connect to this keyboard. It has five rows and 17 column. After the rows and column are joined after which it is time to connect the key switches. To do this, you need to place a diode across each pin on the key switch and then solder it. This will shield the pins from current, thus preventing them from being shorted. The diode allows current to only flow in only one direction. It features a visual indicator of a black line that shows the direction in which the current will flow. Sanabria states that some of the tools available in auto parts stores, including the Autel MaxiIM IM608PRO and the IM508 can assist shoppers or DIY users to program replacement keys and restore the immobilizer's data. The tools plug into OBD ports and guide the user through each step making the process simpler than replacing the car's computer. Jumpstarting the battery The majority of people have a set of jumper cables in their trunks to use in an emergency however, jumping a battery on newer vehicles may not be the best idea. These vehicles are equipped with numerous computers and digital devices which communicate with one another. A voltage surge while the battery is connected to another can fry the components and render your vehicle undriveable. Start the vehicle you are using and let it run for about two minutes before you connect the cables to the disabled one. Attach the red clip to the positive terminal on the battery that is good (it will have “POS” or “+” on it). Attach the other end of the black cable to an unpainted, clean metal surface underneath the disabled car's hood. The engine block is an excellent choice. Don't connect the black cable to the negative terminal of the dead battery as it could ignite a spark that ignites the gasoline in the engine bay. Once the cables are connected, turn on the vehicle that has been disabled and let it run for about five minutes before disconnecting them in reverse order. The battery in your Saab 9-3 will recharge as you drive. It will take a while for it to drop back down. You should consider purchasing an additional key fob as soon as you can. Replacing the original one that works requires the installation and programming of a brand new computer chip. Replacement case Many Saab owners have only one key for their vehicle and if they lose that they'll be charged. The reason for this is that it's costly to replace a key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, and programming. It is recommended to have a spare key in case of theft or any other catastrophe and the most effective way is to purchase an additional key as soon as you can. Don't buy a secondhand key even when it's “new.” Claimed-new keys from sellers selling aftermarket keys won't work and are almost guaranteed to fail at the critical moment. The dealer will charge you the most expensive dollar for only one working key. We can reset and reprogram the computer's EEEPROM to be able to accept a replacement key without replacing the entire system. That can save you a significant amount of money. It's also much less expensive than waiting until you lose the only key.