ecu upgrade chips, and of course they are made for VW engines
what you seem as though you are speaking of though would be the shut off speed where if you hit a certain speed your engine shuts off, an ecu upgrade wont really fix this, and if you are hitting the shut off speed and your engine has approx. stock horse power, then you are probably hitting almost your redline while you are in your top gear, meaning you shouldn't try to go any faster anyway or you'll blow your engine