Exhaust & Emission Systems for 2004 Audi S4
Find parts that fit
We need more information about your vehicle to confirm fit.
2004
Audi
S4
Shop by Popular Categories
SPONSOREDSPONSOREDSPONSOREDSPONSOREDSPONSOREDSPONSORED
1,794 Results
2004 Audi S4 4.2L Right EGR Valve 078131102F
FAST N FREE SHIPPING ~ 30 DAY WARRANTYPre-Owned: Audi$105.59Was: $119.99or Best OfferFree shippingEngine ECM ECU/DME Electronic Control Module Fits 04 AUDI S4 B6 OEM (Fits: 2004 Audi S4)
Top Positive Feedback. Fast Shipping. Trusted Seller!Pre-Owned: Audi$129.00or Best Offer2004-2009 AUDI S4 4.2L - Right Exhaust Manifold 079253034A (Fits: 2004 Audi S4)
Pre-Owned: Audi$27.50Free shippingAUDI S4 4.2L V8 PASSENGER - Exhaust Manifold 079253034A 2004-2008 (Fits: 2004 Audi S4)
Pre-Owned: Audi$44.99or Best Offer$12.00 shippingMagnaFlow 51235-ID Catalytic Converter for 2004-2007 Audi S4 (Fits: 2004 Audi S4)
Catalytic Converter for 2004-2007 S4Brand New: MagnaFlow$197.00Free shippingAudi K04 KO4 RS4 XLC HUGE A6 S6 S4 B5 ALLROAD 2.7T 1998-2004 STAGEII UPGRADE C5
Brand New: XS Power$899.00or Best OfferFree shipping2000-2004 Audi B5 S4 C5 A6 Allroad 2.7T EGT Sensor OEM 078 919 529D
Pre-Owned: Audi$90.00or Best OfferFree shipping2004-2009 AUDI S4 4.2L - EGR Valve HOSE / LINE SET 8E0133817A (Fits: 2004 Audi S4)
Pre-Owned: Audi$33.00Free shipping2004-2008 AUDI S4 - Charcoal Canister HOSE / LINE 8E0201946H (Fits: 2004 Audi S4)
Pre-Owned: Audi$22.99Free shippingBosch OEM Oxygen O2 Sensor for Audi A4 A6 S4 TT/ VW Beetle Golf Jetta Passat (Fits: 2004 Audi S4)
New (Other): Bosch$40.99Trending at $50.17eBay determines this price through a machine learned model of the product's sale prices within the last 90 days.Free shippingOnly 3 left2004-2009 AUDI S4 - LEAK Detection PUMP HOSE 8H0201945 (Fits: 2004 Audi S4)
Pre-Owned: Audi$8.99Free shippingMagnaFlow 49917 Direct-Fit Catalytic Converter for 2004-2006 Audi S4 4.2L (Fits: 2004 Audi S4)
Brand New: MagnaFlow$1,012.00$17.00 shippingMagnaFlow 24317 Direct-Fit Catalytic Converter for 04-06 Audi S4 4.2L (Fits: 2004 Audi S4)
Brand New: MagnaFlow$964.00$17.00 shipping3 watchingAir Flow Meter Fits 04-09 AUDI S4 74072 (Fits: 2004 Audi S4)
90 DAY MONEY BACK GUARANTEE!! 100% TESTED PARTS!!Pre-Owned: Audi$88.34Was: $92.99or Best OfferFree shippingMagnaFlow 441204-OC for 2004 Audi S4
MESSAGE US FOR BETTER THAN ADVERTISED PRICING!!Brand New: MagnaFlow$585.00Free shipping2 pc Bosch Downstream Oxygen Sensors for 2004-2009 Audi S4 4.2L V8 O2 sn (Fits: 2004 Audi S4)
The #1 Seller of Genuine Bosch Parts on eBayBrand New: Bosch$180.23Was: $360.49Canister Purge Solenoid/Purge Valve For 2003-05 Kia Rio 1.6L, 04-09 Audi S4 4.2L (Fits: 2004 Audi S4)
Brand New: Unbranded$10.51Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shippingDorman Vapor Canister Purge Valve for 2004-2009 Audi S4 4.2L V8 Emission yp (Fits: 2004 Audi S4)
The #1 Seller of Genuine Dorman Parts on eBayBrand New: Dorman$40.65Was: $81.24Free shipping04-09 Audi S4 4.2L V8 Secondary Air Injection Hose 8E0133817F (Fits: 2004 Audi S4)
Pre-Owned: Audi$29.99Free shippingFor AUDI / VW (1980-2010) A/C Schrader Valve - R134A (1) SANTECH + WARRANTY (Fits: 2004 Audi S4)
Brand New$12.85Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shippingMagnaflow Sport Series Cat-Back Performance Exhaust System For 2004-2006 Audi S4 (Fits: 2004 Audi S4)
Authorized Dealer - Free Returns - 100% 50K+ FeedbackBrand New: MagnaFlow$1,651.10Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
or Best OfferFree shipping2004-2006 AUDI S4 4.2L - Secondary AIR PUMP HOSE / PIPE 079121070J (Fits: 2004 Audi S4)
Pre-Owned: Audi$54.99Free shippingOEM Vapor Canister Purge Valve Emission 6QE906517A For VW GOLF AUDI A4 S4 (Fits: 2004 Audi S4)
Brand New: OEM$26.40Was: $29.33or Best OfferFree shippingOnly 1 left!2004-2009 AUDI S4 - 4.2L EGR Combi Valve HOSE / LINE 079133817C (Fits: 2004 Audi S4)
Pre-Owned: Audi$18.99Free shippingMagnaFlow for 2004-2009 Audi S4 OEM Grade Federal / EPA Compliant Direct-Fit Cat (Fits: 2004 Audi S4)
Brand New: MagnaFlow$980.00Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shippingOE GENUINE Oxygen Sensor 0258007275 For Audi TT S4 S4 A8 Quattro VW A8 Quattro (Fits: 2004 Audi S4)
New (Other): OE+$44.22Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Was: $47.97Free shippingFits 04-06 Audi S4 4.2L Direct-Fit Catalytic Converter 24318 Magnaflow (Fits: 2004 Audi S4)
Brand New: MagnaFlow$933.00$36.00 shippingMagnaFlow 441204-OD for 2004 Audi S4
MESSAGE US FOR BETTER THAN ADVERTISED PRICING!!Brand New: MagnaFlow$585.00Free shippingMagnaFlow 99235HM-IT for 2004-2007 Audi S4 (Fits: 2004 Audi S4)
MESSAGE US FOR BETTER THAN ADVERTISED PRICING!!Brand New: MagnaFlow$182.00Free shipping4" Flat Tip N1 Style [Loud&Deep] Stainless Steel Muffler Exhaust w/ Silencer +Hp (Fits: 2004 Audi S4)
⭐️400+ Sold✅Money Back Guarantee✅Same Day ShippingBrand New: Spec-D Tuning$38.38Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Was: $59.99Free shipping468 soldFor 2004-2009 Audi S4 Air Pump Check Valve 35722WG 2005 2006 2007 2008 (Fits: 2004 Audi S4)
Brand New$41.95Free shippingCatalytic Converter Fits 2004-2007 Audi S4 (Fits: 2004 Audi S4)
21146-AC I FREE SHIPPING I Made in Canada I EPA ApproveBrand New$418.12Free shipping4 watchingCanister Purge Solenoid/Purge Valve For 1999-05 Hyundai Sonata, Volkswagen Jetta (Fits: 2004 Audi S4)
Brand New: Unbranded$10.40Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shipping2002-2004 AUDI S6 - EGR / Engine Combi Valve 079131102L (Fits: 2004 Audi S4)
Pre-Owned: Audi$34.99Free shippingLeft Catalytic Converter for 2004-2007 Audi S4 (Fits: 2004 Audi S4)
MagnaFlow Part No. 24317-AG FREE SHIPPING!!!Brand New: MagnaFlow$964.00Free shippingMagnaFlow 2004-2006 Audi S4 Cat-Back Performance Exhaust System
Brand New: MagnaFlow$1,546.00Free shippingHYBRID RS6 2.7L AUDI TT RS4 B5 S4 Turbo 2.7TT GASKET SET KO4 RS6 B5S4 2.7 (Fits: 2004 Audi S4)
Brand New: XS Power$8.99$2.50 shipping52 soldCatalytic Converter for 2004-2007 Audi S4 (Fits: 2004 Audi S4)
MagnaFlow 51235-KQ Catalytic ConverterBrand New: MagnaFlow$197.00MagnaFlow 16586 Sport Series Catback Exhaust for 2004-2006 Audi S4 4.2L V8 (Fits: 2004 Audi S4)
Fast and Free Shipping. Easy Returns. Great service.Brand New: MagnaFlow$1,597.05Oxygen Sensor For 2000-2002 Audi S4 2003-2004 Audi RS6 Downstream 4-Wire
Hassle Free Returns. Free Fast Shipping.Brand New: Perfect Fit$30.01Free shipping2003-2005 AUDI S4 B6 4.2 V8 EGR VALVES OEM PAIR LEFT RIGHT 078131102F
Pre-Owned: Audi$39.99$10.80 shippingOE GENUINE Oxygen Sensor 17353 For 2004-2009 Audi S4 Cabriolet 4.2L (Fits: 2004 Audi S4)
New (Other): OE+$53.92Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Was: $58.45Free shipping2 watchingNew For 2001-2006 Hyundai Elantra, Santa Fe Canister Purge Solenoid Purge Valve (Fits: 2004 Audi S4)
Brand New: Unbranded$10.77Free shippingMagnaFlow Sport Series Stainless Cat-Back System Fits 2004-2006 Audi S4 (Fits: 2004 Audi S4)
16586-AE Fits: 2004-2006 Audi S4 Fits 2004-2006 Audi S4Brand New: MagnaFlow$1,546.00Free shipping234-4874 O2 Oxygen Sensor for VW Beetle Phaeton Passat Jetta Golf Audi A4 S4 A6 (Fits: 2004 Audi S4)
Brand New$28.89Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
or Best OfferFree shipping3 watchingFor 2000-2002, 2004-2008 Audi S4 Secondary Air Injection Relay SMP 58571PQYZ
Brand New: Standard Motor Products$17.28Free shippingOXYGEN O2 SENSOR - POST CAT DOWNSTREAM - AUDI A6 ALLROAD S4 - 078906265T (Fits: 2004 Audi S4)
Pre-Owned: Audi$16.99Free shipping2004-2009 AUDI S4 4.2L EMISSION SYSTEM EGR VALVE HOSE PIPE LINE TUBE OEM 17853
Pre-Owned: Audi$21.24Was: $24.99or Best Offer$8.00 shippingOXYGEN O2 SENSOR - POST CAT DOWNSTREAM - AUDI A6 ALLROAD S4 - 078906265AA (Fits: 2004 Audi S4)
Pre-Owned: Audi$9.99Free shippingSecondary Air Injection Pump Check Valve SMP For 2004-2010 Audi S4 (Fits: 2004 Audi S4)
Brand New: Standard Motor Products$24.01Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shippingOxygen Sensor for 2004-2007 Audi S4 Avant
Facet Part No. 10.8247-IE | FREE SHIPPING!!!Brand New: Facet$51.93Free shippingFor 2004 Audi S4 Vacuum Control Valve SMP 307KL29 (Fits: 2004 Audi S4)
Brand New: Standard Motor Products$55.27Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shippingCanister Purge Solenoid/Purge Valve For Kia Spectra 2004-09, Sportage 2005-2010 (Fits: 2004 Audi S4)
Brand New: Unbranded$10.40Top Rated Plus- Sellers with highest buyer ratings
- Returns, money back
- Ships in a business day with tracking
Free shippingVapor Canister Purge Valve For VW Jetta GOlf Audi A4 A6 A8 1C0906517A 0280142353 (Fits: 2004 Audi S4)
Brand New: Unbranded$15.99Free shippingCatalytic Converter Fits 2004 2005 2006 2007 Audi S4 (Fits: 2004 Audi S4)
21146-AC AB Catalytic | Limited Warranty | FREE ShippinBrand New$471.89Free shippingMagnaFlow 51235-KR for 2004-2007 Audi S4 (Fits: 2004 Audi S4)
MESSAGE US FOR BETTER THAN ADVERTISED PRICING!!Brand New: MagnaFlow$197.00Free shipping