RE: 2003 Montero Timing Belt
The timing belt is hidden behind a cover...it's not something you notice like serpentine belts. The only way would be to remove the cover and check, or ask your dealer for the old one back before they change it.
'00 Mitsubishi Pajero: 3.0L 12-valve (311,500+ km/194,700+ miles, Original Owner)
'09 Mitsubishi Galant GTS Premium: 3.8L, Fully Loaded