Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

2021 Audi S4 Fuel & Emissions

What year is your
Free Same Day Shipping

2021 Audi S4 Fuel & Emissions

Filter Results
  • Notify When Available
    O2 Oxygen Sensor

    Replaces 2021 Audi S4 V6 3.0L Downstream Bank 2 Sensor 2 O2 Oxygen Sensor TRQ OSA60637

    Brand: TRQ - OSA60637

    $39.95
    Save 22%
    List $50.95 Save $11.00

    Guaranteed to Fit 2021 Audi S4

    Guaranteed to Fit 2021 Audi S4

  • Notify When Available
    High Pressure Fuel Pump - Delphi

    Replaces 2021 Audi S4 To 6/29/20 Production Date High Pressure Fuel Pump Delphi HM10151

    Brand: Delphi - HM10151

    Out of Stock

    $ 612.95

    Guaranteed to Fit 2021 Audi S4

    Guaranteed to Fit 2021 Audi S4

Close



Audi is a registered trademark of Audi AG. 1A Auto is not affiliated with or sponsored by Audi or Audi AG. See all trademarks.
Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.

Go To Top
Specify your vehicle

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

If your vehicle isn't listed, close the window to return to search.