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It is fairly common to see if a person works in a shop for a long time, but it is not something you would expect to happen again. There is no reason it happens other then poor luck and design flaw. A cold air intake will not damage the computer in anyway, so dont worry about that. You can get a used one from www.car-parts.com sort by price and have them ship it to you. If there was a problem causing your computer to go bad it would likely be a power to ground short, but you would have other symptoms too. Let me know if you have questions or if there is anything else I can do to help. Thanks
It is not anymore common then any other problem. Alot of people buy these cars and like racing them and adding performance parts as I'm sure you know so since so many people are still driving these vehicles parts are getting used and that is why they are not available just as many other parts wouldnt be. I have a database that shows common vehicle repairs in thousands of vehicles and I see a few pcm failures but nothing too serious. I've also owed a 95 talon tsi and have had friends who have owned also owned 1st Generation suchs who built them up. You will blow the motor or transmission/clutch usually before you would have a pcm problem but this is more commonly with the turbo vehicles. Go to the above website and you will find a pcm cheap and have them ship it to you do not have to worry about keeping it cool, if you tried it would probably more exposed to water, humidity, ect and cause more damage then good. Even if your vehicle is running hard the pcm does not work any harder but every moving part does. Let me know if you have questions or if there is anything else I can do to help. Thanks