Platform guide
Audi S4 B9
The B9 S4 is the generation where the supercharger went away. Audi replaced the B8 blower with the turbocharged EA839 3.0T V6, driving an 8-speed automatic and quattro all-wheel drive. US cars are sedans, model years 2018 through 2024.
- Production
- 2018 to 2024
- Chassis
- 8W
- Platform
- MLB evo
- Engine
- EA839
- Transmission
- ZF 8HP
- Drivetrain
- quattro
- Body
- Sedan
- Factory rating
- 354 hp
Factory specifications
| Engine | Family | Displacement | Induction | Output |
|---|---|---|---|---|
| 3.0T V6 | EA839 | 3.0 L · 6 cyl | Turbocharged | 354 hp · 369 lb-ft |
Catalog data: BuildBay vehicle dataset (US market).
- 3.0T V6: Single twin-scroll turbo inside the vee.
Owning and working on it
- Chassis code 8W on the MLB evo platform. The B9 S5 runs the same drivetrain under an F5 body.
- The EA839 carries a single twin-scroll turbo inside the vee, rated 354 hp and 369 lb-ft in US trim.
- Oil service is a topside job: filter and level access are both from above, so no ramps are needed for the change itself.
- The rear axle uses an electronic parking brake. Service mode goes in before rear brake work and a basic setting runs on the way out.
DIY jobs on this platform
Resolved the way BuildBay resolves them for a garage vehicle of this platform: jobs the identity confirms, jobs that apply only if the car has the equipment, and the rows where verified vehicle-specific data exists.
- Applicable jobs
- 617
- If equipped
- 10
- Documented rows
- 14
Where the work is
- Engine maintenance74
- Exterior & body46
- Suspension & steering44
- Electrical, battery & charging41
- Brakes40
- Fuel, intake & forced induction40
Verified vehicle-specific rows
Each row names a job and the scope its data was verified for. Values stay in the product, attached to an exact vehicle; the label says how far the row is verified.
- Change engine oil and filterAudi · S5 / S4 / SQ5 · B9 / FY · EA839Community-verified — confirm for your VIN
- Change rear differential fluidAudi · AWDCommunity-verified — confirm for your VIN
- Change sport-differential fluidAudi · AWDUnverified — treat as a lead
- Drain and refill coolantAudi / VolkswagenCommunity-verified — confirm for your VIN
- Perform walnut-shell carbon cleaningEA888 / EA839 / EA837 / EA855Community-verified — confirm for your VIN
- Register replacement batteryAudi / Volkswagen / BMWCommunity-verified — confirm for your VIN
- Replace automatic-transmission pan and filter8HP / ZF8Community-verified — confirm for your VIN
- Replace engine mountEA837 / EA839Unverified — treat as a lead
- Replace front CV axleAudi / VolkswagenCommunity-verified — confirm for your VIN
- Replace front lower control armAudi · B8 / 8K / 8T / B9 / 8W / F5Community-verified — confirm for your VIN
- Replace PCV valveEA839Unverified — treat as a lead
- Replace rear brake padsAudi · B9Community-verified — confirm for your VIN
- Replace rear CV axleAudi / VolkswagenCommunity-verified — confirm for your VIN
- Retract electronic parking brakeAudi · B9Community-verified — confirm for your VIN
Tools that come up
The tools required most often across the jobs that apply here. BuildBay checks them against your inventory before a job starts.
- Jack stands (pair, rated)46 jobs
- Low-profile floor jack46 jobs
- Wheel chocks46 jobs
- Metric socket set (1/4" + 3/8")37 jobs
- OBD scan tool (OBDEleven / VCDS)33 jobs
- Torque wrench (1/2", 30–150 ft-lb)32 jobs
- Breaker bar (1/2")31 jobs
- Triple-square (XZN) bit set24 jobs
Same platform architecture
Shared architecture scopes research and job discovery. It never implies parts interchange.
- Audi RS 5 B9
- Audi RS 6 C8
- Audi RS 7 C8
- Audi S5 B9
- Audi SQ5 FY
- Porsche Cayenne 9Y0
Add this vehicle to your garage
Pick the Audi S4 B9 by phase, engine, and gearbox, and BuildBay keeps its maintenance, mods, tools, and costs together from the first record.