Cooling fans don't work on 99 NB, so removed them. Have replacements that work, but one has section broken off outer ring and blade. My non-working fan could work, if the fan motor could be separated from the plastic rotor/blades. It doesn't look like they are made to disassemble.....but thought perhaps someone has tried. Thoughts, suggestions? At worst I'm going to cut and glue/pop rivet from my old to new to replace missing section, but rotor for rotor would be much better.