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Saab Key Programming Saab cars built since about 1994 have an immobilizer system made up of coded keys. The addition of a key requires a new transponder, as well as special programming. This is usually done by the dealer using a Tech2 diagnostic tool. The problem is that it can be very expensive. It is always advisable to keep a spare set of keys at hand. Transponder key The transponder is a type of key that is equipped with an electronic chip. This chip sends a signal when the key is inserted into the ignition. The car will then check the signal to determine whether it is identical to the one that is in the key. If The Key Lab match, the car will unlock itself and begin. This is a great method to safeguard your car from theft. Transponder keys are a common feature in cars, but you should be aware they're not as secure as traditional metal keys. While the metal component of a traditional key can be cut and copied, a transponder is protected by an electronic chip. This chip contains a unique code programmed into the car's computers to identify it. The car will recognize the Saab keyfob and allow it to turn on. The car will only recognize the key fob if it is equipped with an unmodified chip and programmed to match. The car will not start in the event that the key is not programmed to match. It is vital to have an extra Saab key. This is especially important if you reside in a rural area that is home to numerous car thieves. The good news is that it's possible to obtain a replacement key for your Saab without having to go to a dealer and pay the expensive prices that they ask. In most cases, you can have a new 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 when they're new. If you only own one, it is recommended to get an additional key as quickly as you can. This is because if the key is lost, the car will need an entirely new CIM and the locking cylinders replaced. This can be expensive, especially for used cars. The next step is to wire the wires of the column and row to the microcontroller. This is the most laborious component of the project and it will require lots of soldering. There's no standard way to go about it, but you should think about how to route and solder each column and row. For this keyboard, there are 5 rows and 17 columns, so there will be 22 microcontroller pins and wires to connect. After the rows and column are joined after which it is time to connect the key switches. Solder a diode to each key switch pin. This will shield the key switch pins from current and stop them from being shorted. A diode only allows current to flow in one direction, and it has an indicator in black that indicates which way the current will flow. Sanabria states that some of the tools available in auto parts stores, including the Autel MaxiIM IM608PRO or IM508 can assist customers shopping or DIY users to program replacement keys and restore the immobilizer's data. The tools connect to OBD ports and help the customer through each step and make the process more straightforward than replacing the vehicle's computer. Jump-starting the battery Most people keep a few sets of jumper cables in their trunk to use in an emergency however, jumping a battery on newer automobiles might not be the best idea. These vehicles are equipped with numerous electronic devices and computers that communicate with one another. A surge of voltage when the battery is connected another could cause damage to the components making your car inoperable. Start the working vehicle and allow it to run for approximately 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 clean and unpainted metal surface underneath the hood of the affected vehicle. The engine block is a good option. The black cable is not to be connected to the negative terminal of the dead battery. This could trigger sparks that could ignite the gasoline inside the engine compartment. Once the cables are connected, you can start the car and let it run for approximately five minutes. Then disconnect the cables in reverse. The battery in the Saab 9-3 will charge while you drive. It takes a while for it to recharge again. It's a good idea purchase a spare fob as soon as you can, because replacing the only functioning one requires the installation of a new computer module and special programming to convince it that your lost keys aren't in the process of trying to steal the car. Replacement Case Saab owners typically only have one car key, and if that is lost, they will be charged. It's expensive to buy a key and requires replacing the CIM or TWICE for older models. It's best 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 are able to. However, don't purchase a secondhand key, even when it's “new.” Claimed-new keys purchased from third-party sellers won't perform and are almost certain to fail in the crucial moment. The dealer will charge you top dollar if you have only one working key. We can reset and reprogram the computer's EEEPROM in order to be able to accept a replacement key without having to replace the entire system. This can save you a significant amount of money. It's cheaper to do this instead of waiting until you lose the sole key.