Are mechanical parts linked to the VIN for warranty?

[atikovi]

Example: Car has damage to a mechanical part due to accident so the 4 year/50,000 mile factory warranty obviously doesn’t cover it. New part is $1600, used around $350. If I install a used part, what happens say a year later if it goes bad while the car is still under warranty? Will Audi be able to tell it’s not the original part? I imaging they record the serial numbers of the engine and transmission and would know about those, but what about smaller things, alternator, a/c compressor, brake booster, etc. for example. Do those also have I.D. connecting them to the car?

[rally3]

Most all components have a manufacture date on them, if you have a 2012 and install a 2009 (alternator for example) it will probably be noticed but may not, depending on how Audi does there warranty audits.