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Saab Key Programming Saab cars made since 1994 come with an immobilizer system that is based on codes for keys. A new transponder is required for addition of an extra key, and special programming. This is usually done by the dealer using the Tech2 diagnostic tool. It can be costly. It is always advisable to keep an extra set of keys in your possession. Transponder key The transponder is a piece of key with an electronic chip. The chip sends a signal when the key is placed in the ignition. The car then examines the signal to determine if it matches that of the key. If the signals match the car will then open and start. This is an excellent way to safeguard your car from theft. Transponder keys are a common feature in vehicles, but you should be aware they aren't as secure as traditional keys made of metal. While the metal parts of a traditional key may be cut and copied however, a transponder is secured by an electronic chip. This chip has a unique code 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. However, it can only do this if the fob has an unmodified chip that has been programmed to match the original. Otherwise, the car would reject the key and not start. It's crucial to ensure that you have a spare key for your Saab. This is particularly true especially if you live in a rural region that has many car thieves. The good news is that it's possible to find a new key for your Saab without needing to visit a dealer and pay the high costs that they ask. In most instances, you can get an original key made on the spot for less than half the cost you would pay at an auto dealer. Wired key Saab cars usually come with two keys upon purchase. If you only have one, you need to purchase an extra key as soon as you can. This is because if you lose it, the car will need a new CIM and the locking cylinders replaced. This could be expensive especially if purchasing a used car. The next step is to wire the column and row wires to the microcontroller. This is the toughest component of the project and it will require lots of soldering. There's no standard way to go about it, but you must consider how you will route and connect each column and row. There are 22 microcontroller wires as well as pins to connect to this keyboard. It has five rows and 17 columns. After the columns and rows are soldered, it's the time to connect them to key switches. To do this, you need to place a diode on each key switch pin and then solder it. This will shield the pins that are used for key switches from current and prevent them from being shorted. A diode allows current to only flow in only one direction. It is equipped with a visible indicator that is black, that shows which way current will flow. Some of the tools you can find at auto parts stores -like the Autel MaxiIM IM608 PRO and IM508 — can aid shop customers or DIY users in some cases program replacement keys and restore the lost immobilizer's data, Sanabria says. The tools connect to the OBD port and guide the customer through the process, making it more simple than replacing the computer inside the vehicle. Jumpstarting the battery The majority of people have a set of jumper cables in their trunks in case of emergency, but jumping a battery for newer cars might not be the best choice. They have numerous digital and computer systems that communicate with one another. A surge of voltage when the battery is connected to another one could cause damage to the parts and render your vehicle unusable. Start the vehicle you are using and allow it to run for around two minutes before connecting the cables to the one that is disabled. Attach the red clip to the positive terminal of the good battery. (It will read “POS” or “+”.) Attach the other end of the black cable to an unpainted, clean metal surface underneath the disabled car's hood. The engine block would be a good choice. The black cable should not be connected to the negative terminal of the dead battery. This could create sparks, which could ignite the gasoline in the engine compartment. Once the cables are connected, turn on the vehicle that has been disabled and let it run for approximately five minutes before disconnecting them in reverse order. Remember that the battery on the Saab 9-3 gets recharged when you drive, and it can take a while for the battery to go back to its original level. It is a good idea to purchase a spare key fob as soon as you can, since replacing the only functioning one requires the installation of a new computer module and special programming to convince it that your missing keys aren't attempting to steal the car. Replacement case Many Saab owners have only one key for their car and if they lose that key, it will cost them. It's costly to add the key and also requires replacing the CIM or TWICE for older models. It is recommended to have a spare key in the event of theft or any other catastrophe the best solution is to purchase a second key as early as you can. However, don't purchase a secondhand key, even the case that it's “new.” Claimed-new keys purchased from third-party sellers won't perform and are almost certain to fail at the crucial moment. The Key Lab will charge you the most expensive dollars if you only have one working key. We can, however, reset and reprogram the computer's EEPROM in order to prepare it to accept the new key, without replacing the entire system. This could help you save a significant amount of money. It's much cheaper than wait until you loose the only key.