Audi say it's fit for life belt (shows no time or mileage interval on the official systems), but Audi UK recommends a belt change every 5 years. Smiljan 10,626 posts

Air filter - Replace and clean housing Every 40,000 miles RS7, RS7 performance, A8 TDI, A8 3.0T, A8 4.0T and Q5 TDI only (ex-cludes S8 4.0L V8 TFSI) Air filter - Replace and clean housing Every 60,000 miles All except RS7, RS7 performance, A8 TDI, A8 3.0T, A8 4.0T and Q5 TDI (The air filter replacement at this interval includes the S8 4.0L V8
Re: VR6 Timing chain replacement interval? (Massboykie) VRs actually have timing chains, and 2 of them i believe. service intervals on them are every ~100k miles. while you're getting them done, i'd suggest swapping out a bunch of your gaskets and maybe your thermostat housing, clutch etc. anything else that may need help.
The 3.2 is a solid engine and not prone to catastrophic timing chain failure. Typically when issues arise it is the upper tensioners that need replacement which can be done engine in the car. Your phase values are a little high on bank 1, but not in the danger zone yet. Above 10 degrees you’ll throw timing Correlation code.
Engine failure: Sometimes, if your timing chain is in a bad state, your engine won’t start at all. It won’t be able to gain the traction it needs to turn over. Volkswagen Timing Chain Replacement vs. Repair. The question whether to repair or replace a timing chain often comes up when Volkswagen owners realize this is the issue in their vehicle. 2014 Ford Fiesta timing belt guide broken: Maintenance, Warranty Issues & Troubleshooting: 6: Apr 28, 2022: T: 2014 ford fiesta timing belt replacement (perform misfire monitor neurtral correction procedure ) Maintenance, Warranty Issues & Troubleshooting: 6: Jun 1, 2021: 2011 Ford Fiesta 1.4i Water Pump Change (Timing Belt change) d2qGMP. 23 330 258 477 144 122 283 403 412

audi timing chain replacement interval