2021 Audi S4: trims, real prices & how to pick yours

6 builds left the factory as a 2021 S4, each a different combination of engine, transmission and body identified by the first eight characters of its VIN. The 4 main configurations sell for $25,999–$43,799 today.

  • 4 main configurations
  • 1,320 vehicles built
  • 38 for sale right now
  • $25,999–$43,799 typical price range

Which S4 is yours?

Enter a VIN — the 17 characters on the windshield or the title — and we’ll match it to its exact factory configuration, typical price and equipment.

Works with any VIN — a different year or model takes you straight to its own page.

Pick your S4

What actually differs

Quattro Premium Plus · AWD Quattro Prestige · AWD WAUC4AF4-M Quattro Premium · AWD Quattro Prestige · AWD WAUC4BF4-M
Typical price today $34,910 $40,220 — $33,139
For sale right now 27 7 1 2
Vehicles built 997 212 70 23
Same on every 2021 S4
  • Engine 3L 6-cyl
  • Power 349 hp
  • Drivetrain All-wheel drive
  • Transmission Automatic
  • Fuel Gasoline
  • Body Sedan
  • Seats 5
  • Doors 4-door

What people actually pay

53 price observations · updated Aug 30, 2026
Quattro Premium Plus · AWD
$34,910
$25,219 $30,193 $35,166 $40,140 $45,113
Price trend

Median down $1,732 over the last 12 months.

2021 S4 price history →
Will it hold value?

A S4 typically keeps about 55% of its price over 5 years — a 5-year-old one runs about $19,491 today.

S4 depreciation by year →
Cost to run

20/28 mpg city/highway. Roughly $2,020/yr on fuel at 15,000 miles.

EPA estimate for the 2021 S4

Safety, in plain English

Driver assistance — varies by configuration
  • ✓ Brakes for you in an emergency
  • ✓ Watches your blind spot
Decoded from NHTSA build records.

What WAUC4AF4-M means

WAU C4AF4 · M
WAU
the World Manufacturer Identifier Audi registered — assembled in Germany
C4AF4
together encode the S4 line — Sedan, 3L 6cyl, All-wheel drive — as Audi filed it, these five characters are read as one block, not letter by letter
M
in position 10 — model year 2021
9, 11–17
differ on every car: check digit, plant code and the serial number
2 rare configurations — mostly fleet, export or irregular VIN patterns. Fewer than 20 known vehicles each.

Already looking at a specific S4?

Paste its VIN — we’ll open that exact car’s page: its configuration, market position and every listing we’ve tracked.

2021 Audi S4 prices →