I had a 2005 X-Trail for four years, drove it through four cold, wet winters and didn't have a single problem. No loose parts sucked into the engine, no frozen door locks, no nothing. Maybe I was just lucky, but it was a very satisfying vehicle.
EDIT: Come to think of it, I think the problems associated with the 2.5-litre engine only affected Altimas and souped-up Sentras, which were assembled at American plants. Unless there is later info that I'm not aware of, the Japan-built X-Trail did not ingest loose screws, bits of gasket, or anything else.