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Saab Key Programming Saab cars built since about 1994 have an immobilizer feature built on coded keys. To add an additional key, you need an entirely new transponder and programming. This is usually done at the dealer using a Tech2 diagnostic tool. The problem is that this could be very expensive. It is always advisable to keep an extra set of keys on hand. Transponder key The transponder is a key equipped with an electronic chip. This chip sends out a signal when the key is inserted into the ignition. The car then analyzes the signal to see if it matches that of the key. If both signals match, the car will unlock itself and begin. This is a great way to protect your vehicle from theft. Transponder keys are an increasingly popular feature in automobiles, however it is important to know that they are not as secure as traditional metal keys. While the metal part of a traditional key may be cut and copied but a transponder key is protected by an electronic chip. The chip is a unique code that's programmed into a car's computer order to identify it. The car will recognize the Saab keyfob and allow it to be turned on. The car will only recognize the key fob if the device has a chip that is unmodified and 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 important especially if you reside in a rural area, where there are numerous car thieves. You can obtain a replacement key for your Saab by visiting the dealership and not paying their pricey cost. In the majority of 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 usually come with two keys when new. If thekeylab.co.uk have only one, it is best to acquire an extra key fob as soon as you can as if you lose it the car will require an entirely new CIM unit, and the locking cylinders need to be replaced. This can be expensive, especially for used cars. The next step is to wire the row and column wires to the microcontroller. This is the most challenging part of the project and will require a good deal of soldering. There's no standard way to go about it, but you need to consider how you will route and connect each column and row. For this keyboard, there are five rows and 17 columns, which means there will be 22 microcontroller wires and pins to connect. After the rows and column are joined after which it is time to connect the key switches. Solder a diode to each key switch pin. This will protect the pins of the key switch from current and also prevent them from being shorted. A diode allows the current to flow in a single direction, and it also has a a black band visual indicator that indicates which way the current will flow. Some of the tools available at auto parts stores -like the Autel MaxiIM IM608 Pro and IM508 — may aid shop customers or DIY users in some cases program replacement keys and restore lost immobilizer information, Sanabria says. The tools plug into OBD ports and guide the customer through each step, making the process easier than replacing the vehicle's computer. Jumpstarting the battery Most people keep a few sets of jumper cables in their trunks to use in an emergency however, jumping a battery on modern cars might not be the best idea. These vehicles are equipped with a number of digital and electronic devices that communicate with each other. A surge in voltage when a battery is connected to another one could cause damage to the parts and render your vehicle unusable. Connect the cables to the vehicle working. Let it run for two minutes. Attach the red clip to the positive terminal of the battery that is good. (It will read “POS” or “+”.) Attach the other end of the black cable to a clean, unpainted metal surface under the disabled car's hood. The engine block would be an excellent choice. Don't connect the black cable to the negative terminal on the dead battery, as it could spark an ignition that ignites the gasoline in the engine bay. Once the cables are connected, you can start the vehicle and let it run about five minutes. Then, disconnect them in reverse. Remember that the battery on your Saab 9-3 is charged when you drive, and it will take a while for the battery to go back to normal. It's a good idea purchase a spare key fob as soon as you can, since replacing the only functioning one requires the installation of a brand new computer module and a special program to convince it that your lost keys are not trying to steal the car. Replacement case Saab owners typically only have one car key, and if it is lost, they'll be charged. It's expensive to add a key and requires replacing the CIM or TWICE for older models. It's best to have a backup key in the event of theft or any other catastrophe and the most effective way is to purchase an extra key as quickly as you can. Even it's “new”, it will not function. Most locksmiths can't help you in the event that you only have one working key and the dealer will charge you for the cost of replacing the computer in your vehicle to create a replacement. We can reset and reprogram the EEEPROM of your computer for it to accept a new key without having to replace the entire system. This could save you a significant amount of money. It's cheaper to do this than waiting until you loose the only key.