Model family
Audi S4 Avant
Observed 2001–2008 (US EPA) · observed model years, not a production range
- 2018 Audi S4 Avant B9
AudiWorld · Justsiff · 20 Oct 2026
My B9 Audi S4 Avant pinged a warning light after hard acceleration saying: "Drive System Fault take to workshop" It has since then been into a garage and had the boost pressure sensor replaced. It...