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Saab Key Programming Saab cars manufactured since 1994 feature an immobilizer mechanism that is based on codes for keys. A new transponder is required for the inclusion of an additional key, and special programming. This is usually done by the dealer using the Tech2 diagnostic tool. It can be costly. This is why it is important to always have a spare key on hand. Transponder key The transponder is a piece of key equipped with an electronic chip. This chip sends out a signal when the key is put in the ignition. The car then analyzes the signal to determine whether it matches that of the key. If the signals are in sync the car will then unlock and begin. This is a great way to deter car theft and keep your vehicle secure from thieves. Transponder keys are a common feature in cars, but it is important to know that they aren't as secure as traditional keys made of metal. While the metal parts of a traditional key could be cut and copied, a transponder is protected by an electronic chip. This chip has an unique code that is programmed into the car's computer to identify it. When a Saab key fob is used, the car recognizes it and allows it to turn on. However, it will only do this if your key fob has an unmodified chip that has been programmed to match it. Otherwise, the car will reject the key and refuse to start. It is crucial to have an extra Saab key. This is especially important if you reside in a rural area with many car thieves. The good news is that you can find a new key for your Saab without needing to visit an auto dealership and pay the hefty prices they ask. In most instances, you can get a new key created on-the-spot for less than half the cost you'd pay at dealerships. Wired key Saab cars are usually supplied with two keys. If you have only one, it is recommended to purchase an extra key fob as soon as you can in case you lose it, your car will require the replacement of a CIM unit and the locking cylinders will have to be replaced. This can be costly especially for cars that are used. The next step is connecting the row and columns wires to your microcontroller. This is the most laborious part of the project, and will require a lot of soldering. There's no standard way to accomplish this, however it's important to plan out the way you'll route and solder the rows and columns. For this keyboard, there are five rows and 17 columns, which means there will be 22 microcontroller wires and pins that you need to connect. After the columns and rows are soldered, it's time to connect them to the key switches. Solder a diode on each key switch pin. This will shield the key switch pins from current and prevent them from being shorted. A diode can only allow the flow of current to be in one direction, and it also has a an indicator of black color that indicates the direction in which current will flow. A few of the tools that are available at auto parts stores- such as the Autel MaxiIM IM608 PRO and IM508 — could help shop customers or even DIY customers in certain instances program replacement keys and restore lost immobilizer information, Sanabria says. The tools connect to OBD ports and guide the customer through each step and make the process more straightforward than replacing the vehicle's computer. Jump-starting the battery A majority of people keep a set in their trunks to jump-start a car in case of emergency, but it might not be a good idea for vehicles that are newer. These vehicles have many computers and digital devices that communicate with each other. A surge in voltage when a battery is hooked up to another could cause damage to these components, rendering your vehicle undriveable. Connect the cables to the vehicle working. Allow it to run for two minutes. 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 an unpainted, clean metal surface underneath the vehicle's hood. An engine block is an ideal choice. Do not connect the black cable to the negative terminal of the dead battery, as it could spark an ignition that ignites the gasoline in the engine bay. Once the cables are connected, you need to begin the car and let it run for approximately five minutes. Then disconnect the cables in reverse. Be aware that the battery in the Saab 9-3 will be charged while you drive, so it will take a while for the battery to come down. You should invest in a second key fob, as soon as you can. The replacement of the one that works requires the installation and programming of a new computer chip. Replacement case Many Saab owners only have one key for their vehicle and if they lose that the cost will be. It's expensive to buy the key and also requires replacing the CIM or TWICE for older models. In the event of theft or any other calamity it is recommended to have a spare key. Don't buy a secondhand key, even the case that it's “new.” Claimed-new keys from aftermarket sellers will not perform and are almost certain to fail at the crucial moment. The majority of locksmiths won't be able to help when you only have one working key, and the dealer will charge you for the cost of replacing the computer in your vehicle to make a replacement. saab replacement keys can reset and reprogram the computer's EEEPROM in order to get it ready to accept a replacement key without replacing the entire system. That can help you save money. It's much cheaper rather than wait until you lose the sole key.