My 2019 PHEV manual shows to replace the HSG belt at 52,500 miles. Attaching maintenance schedule to this post.I only see the regular engine belt when I pull up the Niro service manual is there another belt I see no mention of it. See a Hybrid starter generator but its right next to the engine belt. Manual says replace engine belt every 75k miles.
I think you may be right about the HSG / Drive Belt being the same thing. This diagram only shows the one belt.Guess that's the PHEV I have the HEV this is what mine says. So the HSG belt and the drive belt are the same thing the maintenance schedule only talks about HSG belt but in the how to's they say drive belt on the HEV.
HSG (Hybrid Starter & Generator) belt *4
Except Middle East, Brazil : Inspect every 15,000 km (10,000 miles) or 12 months,
and replace every 105,000km (70,000 miles) or 48 months For Middle East :
Inspect every 10,000 km (6,500 miles) or 12 months,
and replace every 50,000km (30,000 miles) or 24 months