Audi’s that use the 4.2 V8. 2003-2005 Audi B6 S4; 2004-2008 Audi B7 S4; 2002-2005 Audi C5 A6; 2004-2006 Audi C6 A6; 2002-2010 Audi D3 A8; 2003-2010 Volkswagen Phaeton; Audi 4.2 V8 40v vs. 32v FSI. In 2005 Audi built a revised, 32-valve version of the 4.2L V8.
In my experience not on the Gen 3. Some of the very early IS20 Turbo’s has issues but the S3 has a different turbo so you don’t have to worry about that. This platform has been out for 5+ years now and any common issues would have been documented by now. There’s some around with 100K miles with basic maintenance.
Aside from that, there aren't too many things to watch out for. Early waterpump failures and thermostats sticking closed, but those may have already been replaced on whatever car you pick up. Most owners drive these cars for years and put little into them aside from gas, brakes, and tires. Good luck on your search.
Table of Contents show. The Audi S4 has been one of Audi’s most successful models in the company’s history. However, despite what many people think, the best year in the S4’s career has been 2012. The 2012 Audi S4 is one of the most brilliant cars ever made. It’s almost a decade old, but it still holds the charm it had when it first
The 2020 Audi S4 has been recalled 3 times by NHTSA. A typical model has about 200 to 400 samples for each model year. Learn How To Avoid A Lemon Car. What the less powerful A4 Quattro gives up in acceleration due to the added weight of an all-wheel-drive system, the S4 more than makes up for with a street-fighting 0-60-mph time of 5.5 seconds truo6W. 229 458 123 372 396 85 54 319 113

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