Saab Key Programming Saab cars built since 1994 use an immobilizer that relies on coded keys. In order to add a second key, it requires a new transponder, as well as special programming. This is usually handled by the dealer using the Tech2 diagnostic tool. The issue is that this could be quite costly. Always keep an extra set of keys available. Transponder key The transponder is a key that is equipped with an electronic chip. This chip sends out a signal when the key is put into the ignition. The car checks to see whether the signal matches with the one on the key. If the signals match the car will then unlock and begin. This is a fantastic way to protect your vehicle from theft. Transponder keys are a popular addition to cars, but they're not as safe as traditional keys made of metal. While the metal parts of a conventional key can be cut and copied the transponder is protected by an electronic chip. https://www.thekeylab.co.uk/saab-car-keys/ has a unique code that is encoded into the car's system 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 when it has an unmodified chip and has been programmed to match. The car won't start when the key isn't programmed to match. It is essential to have an extra Saab key. This is especially true when you live in a rural region that has numerous car thieves. You can purchase a new key for your Saab by visiting the dealership and not paying their high costs. You can have a replacement key created on the spot at a fraction of the cost you would pay at dealerships. Key for Wired Saab cars are usually delivered with two keys. If you only have one, it is recommended to purchase an additional key fob as quickly as you can since if you lose it, the car will require a new CIM unit, and the locking cylinders will need to be replaced. This can be expensive particularly for used cars. The next step is to connect the wires of the column and row to the microcontroller. This is the most tedious component of the project and it will require a lot of soldering. There is no standardized way to accomplish this, but it is crucial to plan the routes you'll use to solder the rows and columns. For this keyboard, there are 5 rows and 17 columns, which means there will be 22 microcontroller pins and wires to connect. After the columns and rows are joined after which it is time to connect the key switches. Solder a diode on each key switch pin. This will protect the pins from current, and prevent them from being shortened. A diode allows current to only flow in only one direction. It comes with a visual indicator of a black line that shows the direction in which the current will flow. Sanabria says that a few of the tools sold in auto parts stores, such as the Autel MaxiIM IM608PRO or IM508 are able to assist customers shopping or DIY customers to program replacement keys and restore immobilizer data. The tools plug into OBD ports and help the customer through each step making the process simpler than replacing the vehicle's computer. Jumpstarting the battery The majority of people have a set of jumper cables in their trunks to use in an emergency, but jumping a battery on newer automobiles might not be the best option. These cars have a variety of electronic devices and computers that communicate with each other. A surge in voltage when the battery is connected to another could cause damage to the components making your car unusable. Connect the cables to the vehicle that is working. Let it run for two minutes. 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 a clean, unpainted metal surface underneath the vehicle's hood. An engine block is a good option. Don't connect the black cable to the negative terminal of the dead battery, since this could trigger an ignition that ignites the gasoline in the engine bay. Once the cables are connected the vehicle you are not using and let it run for approximately five minutes before disconnecting the cables in reverse order. The battery in your Saab 9-3 will be recharged while you drive. It will take some time for it to fall back. It's a good idea purchase a spare key fob as soon as you can, because replacing the only working one requires the installation of a new computer module and a special program to convince it that the lost keys aren't in the process of trying to steal the car. Replacement Case Saab owners typically only have one car key, and if that is lost, they'll be charged. The reason for this is that it's costly to purchase a new key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. In the event of theft, or any other catastrophe it is best to have an extra key. Even it's "new", it will not work. The dealer will charge you the highest dollar if you have only one working key. We can, however, reset and re-program your computer's EEPROM to prepare it to accept the new key, without replacing the entire system. This can help you save a significant amount of money. It's also less expensive than waiting until you lose the only key.