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Saab Key Programming Saab cars that were built prior to 1994 feature an immobilizer mechanism that is based on codes for keys. A new transponder is required to allow the addition of a second key, and special programming. This is usually done at the dealer using a special 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 can be described as a key equipped with an electronic chip. The chip transmits a signal when the key is put in the ignition. The car will then check the signal to determine whether it matches that of the key. If the signals match, the car will unlock and begin. This is a great way to prevent auto theft and keep your car safe from thieves. Transponder keys are a favored feature in vehicles, but you must be aware that they are not as secure as traditional metal keys. While the metal component of a conventional key can be cut and copied the transponder is protected by an electronic chip. This chip has a unique code that is encoded into the car's system to identify it. When a Saab key fob is used the car recognizes it and allows it to turn on. The car will only recognize the key fob if the device has a chip that is unmodified and has been programmed to match. The car will not start if the key is not programmed to match. It is vital to have a spare Saab key. This is particularly true if you reside in a rural area that is home to numerous car thieves. The good part is that you can find a replacement key to your Saab without having to go to a dealership and pay the high costs that they charge. In most cases, you can have a new key made on-the-spot for less than half the cost of what you would pay at a dealer. Key for Wired Saab cars are usually provided with two keys. If you have only one, you should get an additional key as fast as you can. This is because if the key is lost and the car is damaged, it will require an entirely new CIM and the locking cylinders replaced. This could be expensive, especially if you are purchasing a used vehicle. The next step is to connect the column and row wires to the microcontroller. This is the most laborious part of the project and it will require a lot of soldering. It's not a standard way to do it, but you must consider how you will connect and solder each column and row. 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. To do this you must place a diode across each key switch pin and then solder it. This will protect the key switch pins from current and stop them from being shorted. A diode lets current only flow in one direction. It comes with a visual indicator, a black band, that indicates the direction in which current will flow. Sanabria says that a few of the tools that are sold in auto parts stores, like the Autel MaxiIM IM608PRO and the IM508 can assist customers who are shopping or DIY customers to program replacement keys and restore the immobilizer's data. The tools plug into OBD ports and guide the customer through each step, making the process easier than replacing the car's computer. Jump-starting the battery Most people keep an assortment of tools in their trunk to jump-start their car in an emergency, but this might not be the best option for vehicles with newer technology. They have numerous digital and electronic devices that communicate with one another. A voltage spike when the battery is connected another battery could damage the components and render your vehicle unusable. Connect the cables to the vehicle that is working. Allow it to run for two minutes. 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 of the black cable to a clean, unpainted metal surface underneath the car's hood. lost saab keys www.g28carkeys.co.uk is a good option. Don't connect the black cable to the negative terminal of the dead battery because it could spark an ignition spark that ignites the gasoline in the engine bay. Once the cables are connected, you should start the car and let it run for approximately five minutes. Then, disconnect them in reverse. The battery in your Saab 9-3 will be recharged while you drive. It may take a while it to recharge again. You should purchase an additional key fob when you can. Replacing the one that works requires the installation and programming of a new computer chip. Replacement Case Many Saab owners have only one key for their car and if they lose it, key, it will cost them. It's costly to add the key and also requires replacing the CIM or TWICE for older models. In the event of theft, or any other calamity, it is best to have a spare key. Even if the key is “new” it will not function. The dealer will charge the highest dollar for only one working key. We can, however, reset and re-program the computer's EEPROM to prepare it to accept an alternative key without replacing the entire system. This could save you a lot of money. It's cheaper to do this instead of waiting until you loose the only key.