Enter Vehicle Year Make Model

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

Year
Make
Model
Options
Drivetrain

2004 Audi A4 Emissions & Sensors

What year is your
Free Same Day Shipping

2004 Audi A4 Emissions & Sensors

Filter Results
  • Notify When Available
    Vapor Canister Purge Solenoid Valve

    Replaces 2004 Audi A4 Vapor Canister Purge Solenoid Valve TRQ EVA47788

    Brand: TRQ - EVA47788
    $24.95
    Save 17%
    List $29.95 Save $5.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    O2 Oxygen Sensor

    Replaces O2 Oxygen Sensor TRQ OSA60643

    1 reviews
    Brand: TRQ - OSA60643

    $46.95
    Save 10%
    List $51.95 Save $5.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    Vapor Canister Purge Solenoid Valve

    Replaces 2004 Audi A4 Vapor Canister Purge Solenoid Valve TRQ EVA47789

    Brand: TRQ - EVA47789
    $22.95
    Save 23%
    List $29.95 Save $7.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    13-17 Mazda; Scion; Toyota Oxygen Sensor

    Replaces O2 Oxygen Sensor TRQ OSA61714

    Brand: TRQ - OSA61714

    $65.95
    Save 20%
    List $82.95 Save $17.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    97-06 Audi A4; 07-08 S6; 00-06 TT; 99-05 Beetle; 98-01 Passat w/1.8L Gray Vacuum Check Valve

    Replaces 2004 Audi A4 L4 1.8L Air Injection Check Valve URO 058 905 291K

    Brand: URO - 058 905 291K

    $24.95

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available

    VIDEO

    Electric Air Pump

    Replaces Electric Air Pump Pierburg 7.22738.08.0

    Brand: Pierburg - 7.22738.08.0

    $384.95
    Save 33%
    List $572.95 Save $188.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    Mass Air Flow Sensor

    Replaces 2004 Audi A4 V6 3.0L Mass Air Flow Sensor Hitachi Automotive MAF0036

    Brand: Hitachi Automotive - MAF0036

    $164.95
    Save 31%
    List $238.95 Save $74.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    Mass Air Flow Sensor - Delphi

    Replaces 2004 Audi A4 V6 3.0L Mass Air Flow Sensor Delphi AF10149

    Brand: Delphi - AF10149

    $130.95
    Save 48%
    List $253.95 Save $123.00

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    Electric Air Pump

    Replaces Electric Air Pump Pierburg 7.01805.01.0

    Brand: Pierburg - 7.01805.01.0

    Out of Stock

    $ 47.58

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

  • Notify When Available
    MAP Sensor - Delphi

    Replaces 2004 Audi A4 L4 1.8L MAP Sensor Delphi PS10159

    Brand: Delphi - PS10159

    Out of Stock

    $ 114.95

    Guaranteed to Fit 2004 Audi A4

    Guaranteed to Fit 2004 Audi A4

Close



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.