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Saab Key Programming Saab cars built since about 1994 come with an immobilizer system based on coded keys. The addition of a key requires an entirely new transponder and programming. This is usually done by the dealer using a special 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. The chip transmits a signal when the key is put into the ignition. The car then analyzes the signal to see whether it is the same as that of the key. If the signals are in sync it will unlock and start. This is a great way to avoid auto theft and keep your car secure from thieves. Transponder keys are an increasingly popular feature for cars, but they're not as safe as traditional metal keys. The metal part of the traditional key can be easily cut or copied, while a transponder has an electronic chip that protects it. This chip contains an 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 turn on. The car can only recognize the key fob if it has an unmodified chip and has been programmed to match. The car will not start if the key is not programmed to match. It is essential to have an extra Saab key. This is especially true when you live in a rural area where there are a lot of car thieves. The good news is that you can obtain a replacement key for your Saab without needing to visit a dealership and pay the expensive prices that they ask. In the majority of cases, you can have a brand new key made right on the spot for less than half the cost you would pay at dealerships. Key for Wired Saab cars are typically delivered with two keys. If read on , it is recommended to get an additional key as fast as you can. This is because if the key is lost the car will require a new CIM and the locking cylinders replaced. This can be costly, especially if you are buying a used car. The next step is to connect the column and row wires to the microcontroller. This is the most challenging part of the project and will require a great deal of soldering. There isn't a standard method to go about it, but you must determine how to route and connect each column and row. For this keyboard, there are five rows and 17 columns. So there will be 22 microcontroller pins and wires to connect. After the columns and rows are soldered together then it's time to connect the key switches. To do this, you need to place an inverter over each pin on the key switch and then solder it. This will protect the pins that are used for key switches from current and stop them from being shorted. A diode allows the current to flow in a single direction, and it also has a a black band visual indicator that indicates the direction in which current will flow. Sanabria says that a few of the tools that are sold in auto parts stores, such as the Autel MaxiIM IMM608PRO and IM508 will assist customers who are shopping or DIY users to program replacement keys and restore the immobilizer's data. The tools connect to OBD ports and guide the user through each step which makes the process much easier than replacing the vehicle's computer. Jumpstarting the battery The majority of people have a set of jumper cables in their trunks for emergencies however, jumping a battery in newer cars might not be the most efficient option. These cars have a variety of digital and electronic devices that communicate with one another. A voltage spike when a battery is connected to another one could cause damage to the parts making your car inoperable. 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 battery that's good. (It will say “POS” or “+”.) Attach the other end to a clean unpainted metal surface underneath the hood of the disabled car. The engine block is a great option. The black cable should not be connected to the negative terminal of the dead battery. This could trigger a spark, which would ignite gasoline in the engine compartment. After the cables have been connected, you should start the car and let it run about five minutes. Then, disconnect them in reverse. The battery in your Saab 9-3 is recharged while you drive. It will take some time for it to return to its original state. You should purchase an additional key fob as soon as possible. Replacing the 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 an additional key and it requires replacing the CIM or TWICE for older models. It is recommended to have a second key in the event of theft or other disaster and the best option is to buy an extra key as quickly as you can. Don't buy a secondhand 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 the highest dollar if you only have one working key. We can reset and reprogram the computer's EEEPROM in order for it to accept a replacement key without the need to replace the entire system. This could save you a lot of money. It's also much less expensive than waiting until you lose your sole key.