I can't say for sure, but I think they were all pre-TSB from the factory. I could be wrong. I own a 2003, and it had the pre-TSB unit. I'm sure someone will chime in with the cutoff date, if they did ever come from the factory with the new design.
Zetec....is that like Vtec or something???
Zetec Crew #103/ATX Faction #27 (retired)