Audi A4, S4 (B9) (2017-2019) – Fuse and Relay Box Diagram
In this article, we cover the Audi A4 and Audi S4 (B9 generation), produced from 2017 to 2019. You will find detailed fuse box diagrams for these model years, information about the location of the fuse and relay panels inside the vehicle, and a complete breakdown of each fuse and relay function (fuse layout). This guide helps with troubleshooting, maintenance, and electrical repairs.
3 Facts about the Audi A4 / S4 (B9)
The B9 generation uses Audi’s MLB Evo platform, making the car lighter and more fuel-efficient while improving handling and rigidity.
The Audi S4 (B9) features a turbocharged 3.0L V6 engine, replacing the previous supercharged setup for better performance and efficiency.
The B9 introduced advanced digital technology, including the Audi Virtual Cockpit, upgraded MMI infotainment, and improved driver-assistance systems.