Driving on freeway at about 70 mph and intermediate shaft failed. created dangerous situation as engine started billowing smoke, obscuring traffic causing many cars to swerve dangerously and had stop abruptly. car towed to repair shop empire autohaus, inc. where problem was diagnosed. owned car for three years with zero problems and regular service. learned that many porsche automobiles with the m96 engine (up to 25%) with less than 90,000 miles have had same problem and has yet to be addressed by manufacturer. *jb