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Saab Key Programming Saab cars made since 1994 feature an immobilizer system based on key codes. In order to add a second key, it requires a new transponder, as well as special programming. g28carkeys.co.uk is usually done by the dealer using a Tech2 diagnostic tool. It can be costly. This is the reason why you should always have a spare key at hand. Transponder key The transponder is a piece of key that has an electronic chip. This chip sends out a signal when the key is inserted into the ignition. The car then examines the signal to determine if it matches the one on the key. If the signals are in sync it will unlock and start. This is a great method to protect your car from theft. Transponder keys are a common feature in automobiles, but you should be aware that they aren't as secure as classic keys made of metal. While the metal component of a conventional key can be cut and copied but a transponder key is protected by an electronic chip. The chip has a unique code that is inserted into a car's computer in order to identify it. The car will recognize the Saab keyfob and allow it to be turned on. The car can only recognize the key fob if it is equipped with a chip that is unmodified and programmed to match. If not, the car will refuse to accept the key and will not start. It's essential to ensure that you have an extra key for your Saab. This is especially important when you live in a rural location where there are numerous car thieves. You can get a brand new key for your Saab by going to the dealership and not paying their expensive cost. In the majority of cases, you can have a new key created on-the-spot at a fraction of the cost you'd pay at dealerships. Key for Wired Saab cars are usually supplied with two keys. If you only have one, it's best to acquire an additional key fob as soon as is possible in case you lose it, your car will require a new CIM unit and the locking cylinders need to be replaced. This can be expensive especially for cars that are used. The next step is to wire the wires of the column and row to the microcontroller. This is the toughest part of the project, and will require a lot of soldering. There is no standard method to accomplish this, but it is crucial to plan the route you'll take and solder the rows and columns. For this keyboard, there are five rows and 17 columns. So there will be 22 microcontroller pins and wires to connect. Once the rows and columns are soldered, it's time to connect them to key switches. To do this, put a diode over each pin of the key switch and then solder it. This will shield the pins that are used for key switches from current and prevent them from being shorted. A diode permits current to only flow in only one direction. It features a visual indicator that is black, that shows the direction in which the current will flow. Sanabria states that a number of the tools available in auto parts stores, such as the Autel MaxiIM IMM608PRO and IM508 can assist customers shopping or DIY users to program replacement keys and restore the immobilizer's data. The tools connect to the OBD port and guide the customer through the procedure, making it simpler than replacing the computer inside the vehicle. Jump-starting the battery A lot of people keep a set in their trunks to jump-start their car in an emergency, but it might not be a good option for vehicles with newer technology. These cars are equipped with a variety of digital and computer systems that communicate with each other. A surge in voltage while a battery is hooked up to another can fry these components, rendering your car undriveable. Start the vehicle you are using and allow it to run for around two minutes before connecting the cables to the one that is disabled. Attach the red clip to the positive terminal on the battery that is good (it will have “POS” or “+” on it). Attach the other end to a clear, unpainted metal surface under the hood of the damaged vehicle. The engine block is a great choice. Don't connect the black cable to the negative terminal of the dead battery, since it could spark an ignition source that ignites gasoline in the engine bay. Once the cables are connected, start the vehicle that has been disabled and let it run for approximately five minutes before you disconnect the cables in reverse order. The battery in your Saab 9-3 will recharge as you drive. It will take a while for it to return to its original state. It is a good idea to purchase a spare key 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 car and if they lose it, the cost will be. It's expensive to add an additional key and it requires replacing the CIM or TWICE in the case of older models. It is best to have a spare key in the event of theft or other disaster the best solution is to buy an extra key as soon as you can. However, don't purchase a secondhand key even when it's “new.” Keys that are claimed-new from a second-hand store will not work and are almost guaranteed to fail at the critical moment. The dealer will charge the highest dollar for only one working key. We can reset and reprogram the computer's EEEPROM in order to get it ready to accept a new key without having to replace the entire system. This could save you a great deal of money. It's also much less expensive than waiting until you lose your only key.