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Saab Key Programming Saab cars made from 1994 have an immobilizer system based on coded keys. A new transponder is required for the addition of an additional key, as well as special programming. This is usually done at the dealer using a special Tech2 diagnostic tool. It can be costly. Always keep an extra set of keys in your possession. Transponder key The transponder key comes with an electronic chip that sends a signal to the car when it is inserted into ignition. The car then examines the signal to see whether it is identical to the one that is in the key. If the signals are identical, the car will unlock itself and start. This is a great way to prevent car theft and keep your car safe from thieves. Transponder keys are a common feature in cars, but you should be aware they're not as secure as classic metal keys. The metal component of a traditional key is easily cut and copied, however transponders are protected by an electronic chip that guards it. The chip has a unique code that's 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. But, it's only able to do this if the fob has an unmodified chip that has been programmed to match it. The car won't start in the event that the key has not been programmed to match. It is important to have a spare Saab key. This is especially true when you live in a rural location where there are numerous car thieves. You can get a new key for your Saab by going to the dealership, without having to pay their expensive costs. You can have an original key made on the spot for less than half of the cost you would spend at dealerships. Wired key Saab cars typically come with two keys when new. If you only have one, it's an ideal idea to purchase an additional key fob as soon as possible, because if you lose it, the car will require an entirely new CIM unit and the locking cylinders have to be replaced. This can be costly particularly if you are buying a used car. The next step is to connect the row and columns wires to your microcontroller. This is the most difficult component of the project and it will require lots of soldering. There's no standard way to accomplish this, however it is crucial to plan how you will route and solder the columns and rows. For this keyboard, there are 5 rows and 17 columns. This means there will be 22 microcontroller wires and pins that you need to connect. Once the rows and columns are soldered, it's time to connect them to the key switches. Solder a diode to each key switch pin. This will protect the pins on the key switch from current and keep them from being shorted. A diode allows current to flow in one direction, and it comes with a an indicator in black that indicates which way the current will flow. Some of the tools offered at auto parts stores- such as the Autel MaxiIM IM608 Pro and IM508 — may help shop customers or even DIY users in some cases create replacement keys and restore lost immobilizer data Sanabria says. The tools plug into the OBD port and guide the customer through the process, making it easier than replacing the computer in the vehicle. Jump-starting the battery Most people keep an assortment of tools in their trunks to jump-start a vehicle in the event of an emergency, but it might not be a good idea for cars with more modern technology. These vehicles are equipped with a number of digital and electronic devices that communicate with each other. A surge of voltage when the battery is connected to another battery could damage the components making your car inoperable. Start the working vehicle and allow it to run for around two minutes before you connect the cables to the one that is disabled. Attach the red clip to the positive terminal on the good battery (it will have “POS” or “+” on it). Attach the other end of the black cable to a clean, unpainted metal surface under the disabled car's hood—the engine block is a good choice. The black cable is not to be connected to the negative terminal of the dead battery. This could cause sparks, which could ignite the gasoline that is in the engine compartment. After the cables have been connected, you can begin the car and let it run about five minutes. Then, disconnect them in reverse. The battery in your Saab 9-3 will recharge as you drive. It will take some time for it to drop back down. It's a good idea to buy a spare key fob as soon as you can, because replacing the one that works requires the installation of a new computer module and special programming to convince it that your missing keys are not trying to steal the car. Replacement case Saab owners often only have one car key, and if that is lost, they'll be charged. It's expensive to add keys and will require replacing the CIM or TWICE in the case of older models. It's recommended to have a second key in the event of theft or any other catastrophe and the best option is to buy an extra key as soon as you are able to. Even even if saab keys is “new”, it won't work. Most locksmiths can't help you with a single working key and the dealer will charge top dollar to replace the computer in your car to make a replacement. We can reset and reprogram the EEEPROM of your computer to make it ready to accept a replacement key without replacing the entire system. This could save you a lot of money. It's cheaper to do this than waiting until you loose the only key.