This is the correct answer. The switch over for all of the elements necessary in production happened around April '03 for all geographies. So, mid to late '03 or later should be fine. However, it was sold as a dealer option... so, if it was not installed at delivery it can be easily added by purchasing just the bluetooth box.

FWIW, It can be added to earlier models with a bit of effort and expense. The requirements include an upgraded navigation computer (if nav equipped), radio (the one mounted in the trunk), bluetooth box, mic and possibly cabling (depending on date of mfg). I did this upgrade to my early '03 model (built in oct. '02). Interestingly, mine had all of the cabling, but, none of the upgraded components.