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Saab Key Programming Saab cars manufactured since 1994 feature an immobilizer system based on a set of keys. The addition of a key requires the purchase of a new transponder as well as special programming. This is usually done by the dealer using a Tech2 diagnostic tool. saab 9-3 key is that this can be quite costly. This is why you should always have a spare key available. Transponder key The transponder is a piece of key equipped with an electronic chip. This chip sends a signal when the key is put into the ignition. The car then checks the signal to see whether it is identical to that of the key. If the signals match it will open and start. This is a great method to stop auto theft and keep your car safe from thieves. Transponder keys are an extremely popular accessory for cars, but they're not as safe as traditional metal keys. The metal portion of a traditional key can be easily cut and copied, however a transponder has an electronic chip that protects it. The chip is a unique code which is programmed into a car's computer order 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 your key fob has an unmodified chip that has been programmed to match. The car will not start in the event that the key has not been programmed to match. It is essential to ensure that you have a spare key for your Saab. This is especially true if you reside in a rural region that has many car thieves. The good part is that you can obtain a replacement key for your Saab without having to go to a dealership and pay the high prices they ask. In most instances, you can get a brand new key made right on the spot at a fraction of the price of what you'd pay at dealerships. Key for Wired Saab cars are usually provided with two keys. If you only have one, you need to purchase an additional key as soon as you can. This is because if you lose it and the car is damaged, it will require a new CIM and the locking cylinders replaced. This can be costly, especially for used cars. The next step is connecting the wires for columns and rows to your microcontroller. This is the most difficult aspect of the project and it will require a lot of soldering. There's no standard way to do this, but it is important to think about the route you'll take and solder the columns and rows. There are 22 microcontroller wires and pins to connect to this keyboard. It includes 5 rows and 17 columns. After the rows and column are soldered together, it is time to connect the key switches. Solder a diode on each key switch pin. This will protect the pins of the key switch from current and prevent them from being shorted. A diode only allows the current to flow in a single direction, and it has an indicator of black color that indicates which way the current will flow. Sanabria says that some of the tools sold in auto parts stores, including the Autel MaxiIM IM608PRO or IM508 will assist customers shopping or DIY customers to program replacement keys and restore immobilizer information. The tools plug into the OBD port and automatically guide the user through the procedure, making it simpler than replacing the computer in the vehicle. Jump-starting the battery Most people keep a set of jumper cables in their trunks to use in an emergency, but jumping a battery on newer cars might not be the best option. These vehicles are equipped with numerous computers and digital devices which communicate with each other. A voltage surge when the battery is connected another one could cause damage to the parts making your car inoperable. Connect the cables to the vehicle working. Allow it to run for two minutes. Attach the red clip on 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 car's hood. The engine block would be an ideal choice. Do not connect the black cable to the negative terminal on the dead battery as it could spark an ignition that ignites the gasoline in the engine bay. Once the cables are connected, you should start the car and allow it to run for around five minutes. Then disconnect the cables in reverse. The battery in the Saab 9-3 will charge while you drive. It takes a while for it to fall back. You should consider purchasing a second key fob, when you can. Replacing the only one that works requires the installation and programming of a brand new computer chip. Replacement Case Many Saab owners only have one key for their vehicle and if they lose that key, it will cost them. It's expensive to purchase the key and also requires replacing the CIM or TWICE for older models. In the event of theft or any other calamity it is recommended to have a spare key. But don't buy a used key, even it's “new.” Keys that are claimed to be new purchased from third-party sellers won't perform and are almost certain to fail in the crucial moment. The majority of locksmiths won't be able to help if you have only one working key, and the dealer will charge you high prices to replace the computer in your vehicle to make a replacement. We can, however, reset and reprogram the computer's EEPROM in order to prepare it to accept the new key, without replacing the whole system. This can save you a great deal of money. It's much cheaper instead of waiting until you lose the only key.