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Saab Key Programming Saab cars made since 1994 utilize an immobilizer system that is based on coded keys. A new transponder is required to allow the addition of an additional key, and special programming. This is usually done by the dealer using a Tech2 diagnostic tool. The problem is that this could be extremely expensive. It is recommended to always have an extra set of keys on hand. Transponder key The transponder key is a piece of hardware with an electronic chip that sends a signal to car when it is inserted into the ignition. The car is able to check if the signal matches the one on the key. If the signals are identical the car will be able to unlock itself and start. This is a great way to deter auto theft and keep your vehicle safe from thieves. Transponder keys are an extremely popular accessory for cars, but they are not as safe as traditional keys made of metal. The metal part of the traditional key can be easily cut and copied, whereas a transponder has an electronic chip that guards it. This chip has a unique code that is programmed into the car's computers to identify it. The car will recognize the Saab keyfob, and allow it to turn on. However, it is only able to do this if your key fob has a non-modified chip that has been programmed to match. Otherwise, the car would reject the key and not start. It's essential to ensure that you have a spare key for your Saab. This is particularly true when you live in a rural area that is home to many car thieves. The good news is that you can get a replacement key for your Saab without having to go to an auto dealer and pay the high prices that they ask. In the majority of instances, you can get an original key made on the spot at a fraction of the cost of what you would pay at an auto dealer. Key for Wired Saab cars usually come with two keys upon purchase. If you have only one, it's recommended to purchase an extra key fob as soon as you can, because if you lose it, the car will require the replacement of a CIM unit and the locking cylinders need to be replaced. This can be costly especially if you're purchasing a used car. The next step is connecting the wires for columns and row to your microcontroller. This is the most difficult part of the project and will require a lot of soldering. There isn't a standard way to accomplish this, but it is important to think about the way you'll route and solder the rows and columns. There are 22 microcontroller wires as well as pins to connect to this keyboard. It includes 5 rows and 17 columns. After the columns and rows are soldered, it's time to connect them to the key switches. To do this you must place a diode over each pin on the key switch and then solder it. This will shield the key switch pins from current and also prevent them from being shorted. A diode lets current only flow in one direction. It has a visual indicator with a black band that indicates the direction in which current will flow. Some of the tools available at auto parts stores — such as the Autel MaxiIM IM608 PRO and IM508 — may help shop customers or even DIY customers in certain instances programme replacement keys and recover lost immobilizer information, Sanabria says. The tools plug into OBD ports and help the customer through each step and make the process more straightforward than replacing the car's computer. Jump-starting the battery A lot of people keep a set of jumper cables in their trunk for emergency situations however, jumping a battery on newer automobiles might not be the best idea. These vehicles are equipped with digital and computer systems that communicate with each other. A surge in voltage when batteries are connected to another one could cause damage to the parts making your car inoperable. Start the vehicle that is working and allow it to run for around two minutes before connecting the cables to the disabled one. Attach the red clip to the positive terminal of the battery that is good (it will have “POS” or “+” on it). Attach the other end to a clean and unpainted metal surface beneath the hood of your disabled car. The engine block is an excellent choice. Do not connect the black cable to the negative terminal of the dead battery because this could cause an ignition spark that ignites the gasoline in the engine bay. After the cables have been connected, you can start the vehicle and let it run 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 could take a while for the battery to go back to its original level. It is recommended to purchase an additional 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 it, the cost will be. The reason for this is that it's costly to add a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. It is best to have a second key in case of theft or any other catastrophe the best solution is to purchase an additional key as quickly as you can. Don't purchase a used key, even if it's “new.” Claimed- replacement saab 9-3 key G28 Car Keys purchased from third-party sellers won't be effective and are almost guaranteed to fail at the crucial moment. The dealer will charge you the most expensive dollar if you have only one working key. We can, however, reset and re-program the computer's EEPROM in order to prepare it to accept the new key without having to replace the whole system. This could save you a lot of money. It's much cheaper rather than wait until you lose your only key.