Saab Key Programming Saab cars made since 1994 feature an immobilizer that relies on a set of keys. A new transponder is required for inclusion of an additional key, as well as special programming. This is usually done at the dealer using a Tech2 diagnostic tool. The problem is that it can be very expensive. This is why it is important to always have a spare key at hand. Transponder key The transponder is a type of key that has an electronic chip. The chip transmits a signal when the key is placed into the ignition. The car then analyzes the signal to see whether it is the same as the one on the key. If the signals are the same the car will be able to unlock itself and begin. This is a great method to stop car theft and keep your car safe from thieves. Transponder keys are an increasingly popular feature in cars, but you should be aware that they aren't as secure as classic metal keys. The metal component of the traditional key can be easily copied and cut, but the transponder is protected by an electronic chip that safeguards it. This chip contains an unique code that is embedded into the car's computer to identify it. The car will recognize the Saab keyfob, and allow it to turn on. However, https://www.thekeylab.co.uk/saab-car-keys/ can only do this if the key fob has an unmodified chip that has been programmed to match it. Otherwise, the car will reject the key and refuse to start. It is important to have a spare Saab key. This is particularly true if you reside in a rural area that is home to numerous car thieves. The good news is that you can find a replacement key to your Saab without having to go to an auto dealership and pay the hefty prices that they charge. In the majority of cases, you can have a new key made on-the-spot at a fraction of the cost you'd pay at the dealer. Wired key Saab cars usually come with two keys when they are new. If you have only one, it is a good idea to get an additional key fob as soon as possible, because if you lose it, the car will require a new CIM unit and the locking cylinders have to be replaced. This can be costly especially for cars that are used. The next step is to connect the wires for columns and row to your microcontroller. This is the most challenging part of the project and requires a significant deal of soldering. There isn't a standard method to do it, but you must plan how to route and solder each column and row. There are 22 microcontroller wires and pins to connect to this keyboard. It has 5 rows and 17 column. After the columns and rows are joined, it is time to connect the key switches. To do this you must place a diode over each pin of the key switch and then solder it. This will shield the pins from current, and prevent them from being shorted. A diode allows current to flow in one direction, and it comes with a an indicator of black color that shows the direction in which current will flow. Some of the tools you can find at auto parts stores -- such as the Autel MaxiIM IM608 PRO and IM508 -- can help shop customers or even DIY customers in certain cases replace keys in the program and restore lost immobilizer data Sanabria says. The tools plug into the OBD port and guide the user through the process, making it easier than replacing the computer in the vehicle. Jump starting the battery Most people keep a few sets of jumper cables in their trunks for emergencies, but jumping a battery for newer vehicles may not be the best idea. These vehicles are equipped with computers and digital devices which communicate with one another. A voltage surge when the battery is connected to another can fry the components making your car inoperable. Connect the cables to the vehicle working. Allow it to run for two minutes. Attach the red clip to the positive terminal of the good battery (it will have "POS" or "+" on it). Attach the other end to a clean and unpainted metal surface beneath the hood of the damaged vehicle. The engine block is a good choice. Don't connect the black cable to the negative terminal on the dead battery, since it could ignite a spark that ignites the gasoline in the engine bay. Once the cables are connected, start the car and let it run for about five minutes. Then disconnect the cables in reverse. Keep in mind that the battery on your Saab 9-3 is charged during your drive, which means it may take some time for the battery to come back to its original level. It is a good idea to purchase a spare fob as soon as you can, because replacing the only working one requires the installation of a brand new computer module and a special program to convince it that your missing keys aren't trying to steal the car. Replacement case Saab owners usually have only one car key, and if it is lost, they'll be charged. It's expensive to add the key and also requires replacing the CIM or TWICE in the case of older models. It's recommended to have a spare key in case of theft or any other catastrophe the best solution is to purchase a second key as soon as you can. Even even if the key is "new" it will not function. The dealer will charge you top dollar for only one working key. We can reset and reprogram the EEEPROM of your computer to get it ready to accept a replacement key without replacing the entire system. This could save you a lot of money. It's also much less expensive than waiting until you lose your only key.