I own two cars with timing chains. There is no service interval for these items in the manual but the caveat is that your car is serviced within the manufacturers guidelines. Does this mean they never need to be changed ? It's not a serviceable item like a timing belt, but the truth is it is still a wear and tear item i.e. chain stretch and in the case of the EA888 motor there is the well documented chain tensioner failure that causes $$$ of damage.
VW covering some cars completely under goodwill, some at 50% and while lots of owners are out of pocket makes it a grey area as to who is responsible for the failure. It would make sense that they'd be more willing to compensate those with full VW service history.
Not unusual to see posts on here (but more so on briskoda - I hear of a failure every other week) regarding failures on the 2.0T EA888 motor as early model tensioners were 5hithouse and VW kept updating the tensioner to better built units on newer built cars.
I was unaware this was an issue for the Polo and a relatively low km one at that - but the process is the same. Hope you get this sorted out by VW!
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