67 plate Audi A5 3.0 tdi 218ps chain tensioner failure??

[Andy2113]

https://m.youtube.com/watch?v=yFPyAgdveHc.  hi guys I’ve just brought a 17 plate Audi A5 3.0tdi 218ps and it’s starting making a weird ticking sound coming from both sides of the engine but more from the drivers side .

Could this be  the dreaded chain tensioner failure?  If so the car only has 58000 on the clock surely Audi must have to fix this as it’s a fault with the car ??? Or am I being paranoid and it’s just the injectors ?  Any advice appreciated thanks !