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Saab Key Programming Saab cars made since 1994 use an immobilizer system that is based on key codes. In order to add a second key, it requires an entirely new transponder and programming. This is usually done by the dealer using the Tech2 diagnostic tool. It can be costly. This is the reason why you should always have a spare key available. Transponder key The transponder is a piece of key that is equipped with an electronic chip. This chip sends a signal when the key is put into the ignition. The car then examines the signal to see whether it is the same as the one on the key. If the signals are in sync it will open and start. This is a great way to prevent car theft and keep your car safe from thieves. Transponder keys are a popular feature in automobiles, however you must be aware that they aren't as secure as classic keys made of metal. While the metal portion of a conventional key can be cut and copied but a transponder key is protected by an electronic chip. The chip is a unique code that is programmed into a car's computer order to identify it. The car will recognize the Saab keyfob and allow it to turn on. However, it will only do this if the fob has a non-modified chip that has been programmed to match. If not, the car will reject the key and refuse to start. It is vital to have a spare Saab key. This is particularly important for those who live in a rural region where there are many car thieves. You can get a brand new key for your Saab by going to the dealership without paying their expensive prices. You can get the replacement key on the spot for less than half the price you'd pay at the dealership. Key for Wired Saab cars usually come with two keys when new. If you have only one, you need to purchase an additional key as fast as you can. This is because if the key is lost and the car is damaged, it will require a new CIM and the locking cylinders replaced. This can be costly especially for used vehicles. The next step is connecting the wires for columns and rows to your microcontroller. This is the most tedious component of the project and will require lots of soldering. It's not a common way to do it, but you need to consider how you will connect and solder each column and row. For this keyboard, there are 5 rows and 17 columns. This means there will be 22 microcontroller pins and wires to connect. After the columns and rows are soldered together, it is time to connect the key switches. To do this, put a diode on each pin of the key switch and then solder it. This will shield the pins of the key switch from current and stop them from being shorted. A diode permits current to only flow in one direction. saab key replacement has a visual indicator, a black band, that indicates which direction current will flow. Sanabria says that a few of the tools offered in auto parts stores, including the Autel MaxiIM IM608PRO or IM508 can assist customers who are shopping or DIY customers to program replacement keys and restore data from the immobilizer. The tools plug into OBD ports and guide the customer through each step which makes the process much easier than replacing the vehicle's computer. Jump-starting the battery A lot of people keep a set of jumper cables in their trunk to use in an emergency however, jumping a battery in newer cars might not be the most efficient option. These vehicles are equipped with a number of computers and digital devices that communicate with one another. A voltage surge while the battery is connected to another can fry these components and render your car undriveable. Connect the cables to the vehicle that is operating. Allow it to run for two minutes. 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 clear, unpainted metal surface underneath the hood of your disabled vehicle. The engine block is an excellent option. Don't connect the black cable to the negative terminal on the dead battery, since it could spark an ignition source that ignites gasoline in the engine bay. Once the cables are connected, turn on the vehicle that is 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 be recharged while you drive. It takes a while for it to recharge again. You should purchase an additional key fob as soon as you can. Replacing the one that works requires the installation and programming of a brand new computer chip. Replacement case Saab owners typically only have one car key, and if that is lost, they'll be charged. It's expensive to add the key and also requires replacing the CIM or TWICE in the case of older models. It's recommended to have a second key in case of theft or any other catastrophe, and the best way is to buy an extra key as soon as you can. Even when the key is “new”, it will not work. The dealer will charge the highest dollars if you only have one working key. We can reset and reprogram the computer's EEEPROM to make it ready to accept a replacement key without replacing the entire system. This can save you a significant amount of money. It's much cheaper than waiting until you loose the only key.