Saab Key Programming Saab cars made from 1994 have an immobilizer system based on key codes. A new transponder is required to allow the addition of an additional key, as well as special programming. This is usually handled by the dealer using a Tech2 diagnostic tool. The problem is that it can be extremely expensive. It is always advisable to keep a spare set of keys available. Transponder key The transponder keys are keys with an electronic chip that sends a signal to the car when it is put into the ignition. The car then checks the signal to see whether it matches the one in the key. If the signals are the same, the car will unlock itself and begin. This is a great way to deter auto theft and keep your car safe from thieves. Transponder keys are a common feature in automobiles, but you must be aware that they are not as secure as traditional metal keys. While the metal part of a traditional key can be cut and copied but a transponder key is protected by an electronic chip. The chip has a unique code that is inserted into the car's computer in order to identify it. The car will recognize the Saab keyfob and allow it to be turned on. However, it is only able to do so if the key fob is equipped with a chip that is not modified that has been programmed to match the original. If not, the car will reject the key and won't start. It's important to make sure that you have a spare key for your Saab. This is especially important for those who live in a rural area that is home to many car thieves. You can get a new key for your Saab by going to the dealership without paying high costs. In most cases, you can have an original key made on the spot for less than half the cost you'd pay at the dealer. Key for Wired Saab cars typically come with two keys when new. If https://www.thekeylab.co.uk/saab-car-keys/ , you should purchase an extra key as soon as you can. This is because, if it's lost, the car will need a new CIM and the locking cylinders replaced. This can be costly particularly if you are purchasing a used vehicle. The next step is to connect the wires for columns and row to your microcontroller. This is the most difficult part of the project and requires a significant amount of soldering. There isn't a standard way to accomplish this, but it's important to plan out how you will route and solder the columns and rows. There are 22 microcontroller wires and pins that you can connect for this keyboard. It includes 5 rows and 17 columns. Once the rows and columns are soldered, it's the 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 stop them from being shorted. The diode allows current to only flow in only one direction. It is equipped with a visible indicator, a black band, that shows the direction in which the current will flow. Sanabria states that some of the tools offered in auto parts stores, like the Autel MaxiIM IM608PRO or IM508 are able to assist customers shopping or DIY customers to program replacement keys and restore immobilizer data. The tools connect to OBD ports and guide the user through each step which makes the process much easier than replacing the car's computer. Jump-starting the battery Most people keep an item in their trunks to jump-start their vehicle in the event of an emergency, but it might not be the best option for vehicles with newer technology. They have numerous digital and computer systems that communicate with each other. A surge in voltage when the battery is connected to another battery could fry these components and render your vehicle unable to drive. Start the vehicle that is working and let it run for about two minutes before connecting the cables to the disabled one. Attach the red clip to the positive terminal of the battery that is good. (It will read "POS" or "+".) Attach the other end to a clean and unpainted metal surface under the hood of your disabled vehicle. The engine block is an excellent alternative. Don't connect the black cable to the negative terminal of the dead battery because this could trigger a spark that ignites the gasoline in the engine bay. Once the cables are connected the vehicle you are not using and let it run for about five minutes before disconnecting the cables in reverse order. The battery in your Saab 9-3 will recharge as you drive. It will take a while for it to recharge again. You should invest in an additional key fob when you can. Replacing the only one that works requires the installation and programming of a brand new computer chip. Replacement Case Saab owners often only have one car key, and if that is lost, they will be charged. It's expensive to add a key and requires replacing the CIM or TWICE in the case of older models. It's best to have a spare key in case of theft or other disaster the best solution is to purchase an extra key as quickly as you can. Don't purchase a used key even the case that it's "new." Keys that are claimed-new from aftermarket sellers will not be effective and are almost guaranteed to fail at the critical moment. Most locksmiths aren't able to help with a single working key and the dealer will charge for the cost of replacing the computer in your vehicle to make a new replacement. We can reset and reprogram the EEEPROM of your computer to make it ready to accept a replacement key without replacing the entire system. This could save you a lot of money. It's also cheaper than waiting until you lose the only key.