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Saab Key Programming Saab cars produced from 1994 have an immobilizer system that relies on coded keys. A new transponder is required in order to enable the inclusion of an additional key, as well as special programming. This is usually done at the dealer using a Tech2 diagnostic tool. This can be expensive. Always keep saab 9-5 key replacement of keys available. Transponder key The transponder key is a key equipped with an electronic chip. It transmits a signal to the car when it is inserted into the ignition. The car checks to see whether the signal matches with the one on the key. If the signals match then the car will be able to unlock and start. This is a great way to avoid auto theft and keep your vehicle safe from thieves. Transponder keys are an extremely popular accessory for cars, but they're not as safe as traditional metal keys. The metal component of a traditional key is easily cut or copied, while a transponder has an electronic chip which protects it. The chip is a unique code that's programmed into a car's computer order 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 when it has a chip that is unmodified and has been programmed to match. The car won't start in the event that the key has not been programmed to match. It is essential to have an extra Saab key. This is especially important especially if you reside in a rural area, where there are a lot of car thieves. The good part is that you can obtain a replacement key for your Saab without having to go to a dealership and pay the hefty prices that they charge. You can have the replacement key on the spot at a fraction of what you would pay at a dealership. Wired key Saab cars are typically delivered with two keys. If you only have one, it is a good idea to get an additional key fob as quickly as you can as if you lose it, the car will require a new CIM unit, and the locking cylinders will have to be replaced. This can be costly especially for used vehicles. The next step is to connect the wires for columns and rows to your microcontroller. This is the most laborious component of the project and will require lots of soldering. There is no standardized way to do this, but it is important to think about the way you'll route and solder the columns and rows. For this keyboard, there are 5 rows and 17 columns, so there will be 22 microcontroller wires and pins that you need to connect. Once the rows and columns are soldered, it's time to connect them to key switches. Solder a diode on each key switch pin. This will protect the pins from current, thus preventing them from being shortened. A diode lets current only flow in only one direction. It features a visual indicator with a black band that shows which way current will flow. Sanabria states that some of the tools available in auto parts stores, like the Autel MaxiIM IM608PRO and the IM508 are able to assist customers who are shopping or DIY users to program replacement keys and restore the immobilizer's data. The tools plug into OBD ports and guide the user through each step and make the process more straightforward than replacing the car's computer. Jump-starting the battery The majority of people have a set of jumper cables in their trunk in case of emergency however, jumping a battery on newer vehicles might not be the best option. These vehicles are equipped with many digital and computers that communicate with one another. A voltage spike when batteries are connected to another can fry the components, rendering your car undriveable. Start the working vehicle and allow it to run for around two minutes before you connect the cables to the non-working one. Attach the red clip to the positive terminal of the good battery. (It will read “POS” or “+”.) Attach the other end of the black cable to an unpainted, clean metal surface beneath the damaged car's hood—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 create sparks, which would ignite the gasoline inside the engine compartment. Once the cables are connected, you should start the vehicle and let it run for about five minutes. Then disconnect them in reverse. The battery in the Saab 9-3 will charge while you drive. It will take a while for it to return to its original state. It's a good idea buy a spare key fob as soon as you can, because replacing the one that works requires the installation of a new computer module and special programming to convince it that your missing keys aren't attempting to steal the car. Replacement Case Saab owners usually have only one car key, and if it is lost, they'll be charged. It's expensive to add an additional key and it requires replacing the CIM or TWICE for older models. It's recommended to have a spare key in case of theft or other disaster and the best option is to purchase an extra key as soon as you are able to. Even if the key is “new”, it will not function. Most locksmiths cannot help you if you have only one working key and the dealer will charge you for the cost of replacing the computer in your car to make a new replacement. We can reset and reprogram the computer's EEEPROM in order to make it ready to accept a new key without having to replace the entire system. This could save you a lot of money. It's also much less expensive than waiting until you lose your only key.