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Saab Key Programming Saab cars made since 1994 have an immobilizer system based on coded keys. In order to add a second key, it requires the purchase of a new transponder as well as special programming. This is usually done at the dealer, using a specially-designed Tech2 diagnostic tool. The issue is that this could be very costly. This is why you should always have a spare key available. Transponder key The transponder is a key that has an electronic chip. The chip transmits a signal when the key is inserted in the ignition. The car then checks the signal to see whether it is identical to the one on the key. If the signals match, the car will open and start. This is a great method to deter auto theft and keep your car secure from thieves. Transponder keys are a favored feature in automobiles, but you should be aware they're not as secure as classic metal keys. While the metal component of a conventional key can be cut and copied the transponder is protected by an electronic chip. The chip has a unique code that is programmed into the car's computers to identify it. When a Saab key fob is used, the car recognizes it and allows it to turn on. However, it can only do this if the fob has an unmodified chip that has been programmed to match the original. The car won't start when the key isn't programmed to match. It is important to have an extra Saab key. This is particularly important if you reside in a rural area with many car thieves. The good thing is that you can obtain a replacement key for your Saab without having to go to a dealer and pay the high prices that they ask. You can have the replacement key on the spot for less than half the price you'd spend at a dealership. Wired key Saab cars usually come with two keys when they're new. If you own only one, you should purchase an additional key as fast as you can. This is because if the key is lost the car will require a new CIM and the locking cylinders replaced. This can be expensive especially for used vehicles. The next step is to connect the wires for the column and row to the microcontroller. This is the most challenging part of the project and will require a great deal of soldering. There isn't a standard method to do it, however, you should consider how you will route and connect each column and row. There are 22 microcontroller wires and pins to connect for this keyboard. It includes 5 rows and 17 columns. Once the rows and columns are soldered, it's time to connect them to key switches. To do this you must place a diode on each pin on the key switch and then solder it. This will protect the pins from current and prevent them from being cut off. A diode lets current only flow in one direction. It features a visual indicator of a black line that indicates which direction current will flow. A few of the tools that are available at auto parts stores- such as the Autel MaxiIM IM608 Pro and IM508 — may help customers in the shop, or even DIY users in some cases create replacement keys and restore lost immobilizer data Sanabria says. The tools connect to OBD ports and guide the customer 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, but jumping a battery on newer automobiles might not be the best option. They have numerous electronic devices and computers that communicate with each other. A voltage surge when the battery is connected another could cause damage to the components making your car inoperable. Start the vehicle that is working and allow it to run for approximately two minutes before you connect the cables to the battery that is not working. Attach the red clip to the positive terminal on the good battery (it will have “POS” or “+” on it). Attach the other end to a clean and unpainted metal surface beneath the hood of the disabled car. The engine block is a great alternative. Do not connect the black cable to the negative terminal on the dead battery because this could cause an ignition that ignites the gasoline in the engine bay. Once the cables are connected the vehicle that is disabled and allow it to run for around five minutes before disconnecting the cables in reverse order. Remember that G28 Car Keys on your Saab 9-3 is recharged when you drive, and it could take a while for the battery to go back to normal. It's a good idea to invest in a spare key fob as soon as you can, because replacing the only functioning one requires the installation of a brand new computer module and a special program to convince the system that your lost keys aren't in the process of trying to steal the car. Replacement Case Many Saab owners only have one key for their vehicle and if they lose it, it's going to cost them. It's expensive to purchase a key and requires replacing the CIM or TWICE in the case of older models. It is best to have a spare key in the event of theft or other disaster and the most effective way is to purchase a second key as quickly as you can. Even even if the key is “new” it will not work. The dealer will charge the highest dollar if you have only one working key. We can reset and reprogram the EEEPROM of your computer to get it ready to accept a replacement key without having to replace the entire system. This could help you save a significant amount of money. It's cheaper to do this rather than wait until you lose the sole key.