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Saab Key Programming Saab cars manufactured since 1994 feature an immobilizer system based on a set of keys. A new transponder is required for the addition of an extra key, and special programming. This is usually done by the dealer using a Tech2 diagnostic tool. The issue is that this could be quite costly. You should always keep a spare set of keys available. Transponder key The transponder is a piece of key that is equipped with an electronic chip. The chip sends a signal when the key is inserted in the ignition. The car then checks to see whether the signal matches the one on the key. If the signals match, the car will unlock and begin. This is a great method to stop auto theft and keep your vehicle secure from thieves. Transponder keys are an increasingly popular feature in automobiles, but you should be aware that they are not as secure as classic metal keys. While the metal portion of a conventional key can be cut and copied however, a transponder is secured by an electronic chip. The chip contains a unique code that is inserted into a car's computers in order to identify it. The car will recognize the Saab keyfob and allow it to be turned on. However, it will only do this if your key fob has an unmodified chip that has been programmed to match. saab key fob repair will not start when the key isn't programmed to match. It's essential to ensure that you have a spare key for your Saab. This is particularly important when you live in a rural location where there are a lot of car burglars. You can get a new key for your Saab by going to the dealership, without having to pay their expensive prices. You can get a replacement key made on the spot for less than half what you would spend at dealerships. Key for Wired Saab cars are usually delivered with two keys. If you only have one, it's best to acquire an additional key fob as soon as is possible as if you lose it, your car will require an entirely new CIM unit, and the locking cylinders will have to be replaced. This can be costly especially for used vehicles. The next step is to connect the wires for columns and rows to your microcontroller. This is the most challenging part of the project and will require a large deal of soldering. It's not a common way to do it, however, you should consider how you will route and solder each column and row. There are 22 microcontroller wires and pins to connect to this keyboard. It includes 5 rows and 17 column. After the rows and column are soldered together then it's time to connect the key switches. To do this you must place an inverter over each pin of the key switch and solder it. This will protect the pins on the key switch from current and prevent them from being shorted. A diode allows current to only flow in one direction. It has a visual indicator with a black band that indicates which direction current will flow. Sanabria states that some of the tools sold in auto parts stores, such as 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 much easier than replacing the computer inside the vehicle. Jump starting the battery Most people keep an assortment of tools in their trunk to jump-start their car in case of emergency, but it may not be the best idea for newer cars. These vehicles have many digital and computer systems that communicate with one another. A surge in voltage while a battery is hooked up to another can fry these components, rendering your car unable to drive. Connect the cables to the vehicle working. Let it run for two minutes. Attach the red clip to the positive terminal of the good battery. (It will say “POS” or “+”.) Attach the other end of the black cable to a clean, unpainted metal surface beneath the damaged car's hood. The engine block is an ideal choice. Don't connect the black cable to the negative terminal of the dead battery as this could cause an ignition spark that ignites the gasoline in the engine bay. Once the cables are connected, turn on the vehicle that has been disabled and let it run for approximately five minutes before disconnecting the cables in reverse order. The battery in your Saab 9-3 will recharge while you drive. It will take a while for it to recharge again. It is a good idea to purchase a spare fob as soon as you can, because replacing the one that works requires the installation of a brand new computer module and a special program to convince the system that your lost keys aren't in the process of trying to steal the car. Replacement case Many Saab owners have only one key for their vehicle and if they lose it, key, it will cost them. It's expensive to add a key and requires replacing the CIM or TWICE in the case of older models. It is best to have a backup key in the event of theft or other disaster and the most effective way is to purchase an extra key as early as you can. Don't buy a secondhand key even the case that it's “new.” Keys that are claimed-new from a second-hand store will not work and are likely to fail at the critical moment. The dealer will charge you the highest dollar if you have only one working key. However, we can reset and re-program the computer's EEPROM to accept the new key, without replacing the whole system. This could help you save money. It's much cheaper rather than wait until you lose your only key.