How to Repair a saab car key 93 Key Fob Your Saab 9-3 keyfob may have a malfunctioning chip. The metal component of old car keys is simple to copy. Modern key-fobs however, come with an immobilizer to guard your vehicle. The first step in determining the reason why your key fob isn't working is to replace the battery in your coin. This is a cheap and easy fi...