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Audi S4 Engine Emission Parts

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Allen Bolt (5mm) - Priced Each

ES#2770514 - N01474011 - Allen Bolt (5mm) - Priced Each - Stainless steel for extra corrosion resistance. M6x16 - ECS - Audi Volkswagen

Stainless steel for extra corrosion resistance. M6x16 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2770514
Mfg#:
N01474011
In Stock
ON SALE! SAVE 25%
$0.99

This product was last offered at the strikethrough price on
06-13-2026

$0.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Check Valve - Priced Each

ES#4818424 - 058905291K - Check Valve - Priced Each - Used in multiple locations in the vacuum system - Bremmen Parts - Audi Volkswagen

Used in multiple locations in the vacuum system 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818424
Mfg#:
058905291K
Ships on Aug 11, 2026
Auto Notify
ON SALE! SAVE 35%
$4.99

This product was last offered at the strikethrough price on
05-02-2026

$3.26 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

EGR Valve Gasket - Priced Each

ES#2718617 - 078131120K - EGR Valve Gasket - Priced Each - Ensure a proper seal - Elring - Audi Volkswagen

Ensure a proper seal 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
2718617
Mfg#:
078131120K
In Stock
$5.14 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve service kit

ES#2771261 - 077103245Bkt3 - Pressure Control Valve service kit - Everything needed to replace the PCV - Assembled By ECS - Audi

Everything needed to replace the PCV 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2771261
Mfg#:
077103245BKT3
Ships in 1 day
$250.11 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve

ES#300006 - 1C0906517A - Purge Valve - Common cure for DTC P0441 - Genuine Volkswagen Audi - Audi Volkswagen

Common cure for DTC P0441

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
300006
Mfg#:
1C0906517A
Ships in 1 day
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$263.99

This product was last offered at the strikethrough price on
07-22-2026

$245.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap Seal

ES#294938 - 191201557 - Gas Cap Seal - Seals the connection between the gas cap and filler neck - Genuine Volkswagen Audi - Audi

Seals the connection between the gas cap and filler neck

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
294938
Mfg#:
191201557
In Stock
10% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$29.99

This product was last offered at the strikethrough price on
07-22-2026

$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Leak Detection Pump

ES#3709117 - 8K0906253N - Leak Detection Pump - Tests the fueling system for leaks - Genuine Volkswagen Audi - Audi

Tests the fueling system for leaks

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3709117
Mfg#:
8K0906253N
Ships in 1 day
8% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$258.99

This product was last offered at the strikethrough price on
07-22-2026

$236.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR Universal Oil Catch Can - AN Fittings

ES#4487795 - MS100218 - APR Universal Oil Catch Can - AN Fittings - Universal/Service part for APR's MS100199 full catch can system - APR - Audi Volkswagen Porsche

Universal/Service part for APR's MS100199 full catch can system Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4487795
Mfg#:
MS100218
Ships on Aug 17, 2026
11% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$264.99

This product was last offered at the strikethrough price on
07-22-2026

$234.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Thread Chaser

ES#4001163 - CTA2068 - Oxygen Sensor Thread Chaser - Remove rust and dirt for easy installation with this tool - CTA Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Remove rust and dirt for easy installation with this tool

Brand:
CTA Tools - Corporate Logo
ES#:
4001163
Mfg#:
CTA2068
In Stock
$11.41 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Check Valve - Priced Each

ES#2598293 - 058905291K - Check Valve - Priced Each - Used in multiple locations in vacuum system - URO - Audi Volkswagen

Used in multiple locations in vacuum system 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2598293
Mfg#:
058905291K
In Stock
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Priced Each

ES#2678230 - 06E906265R - Front Oxygen Sensor - Priced Each - Keep your engine running efficiently - Walker - Audi

Keep your engine running efficiently Fits the left and right position

Brand:
Walker - Corporate Logo
ES#:
2678230
Mfg#:
06E906265R
Back Ordered
$227.99

This product was last offered at the strikethrough price on
05-07-2026

$221.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Pressure Control Valve (PCV)

ES#4818502 - 077103245B - Pressure Control Valve (PCV) - Also called the "breather valve" or "oil separator" - Bremmen Parts - Audi Volkswagen

Also called the "breather valve" or "oil separator" 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818502
Mfg#:
077103245B
In Stock
ON SALE! SAVE 23%
$17.99

This product was last offered at the strikethrough price on
05-02-2026

$13.86 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Vent Tube

ES#450388 - 8K0201183A - Vent Tube - Connects the charcoal canister and the fuel pump - Genuine Volkswagen Audi - Audi

Connects the charcoal canister and the fuel pump

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
450388
Mfg#:
8K0201183A
Ships in 2 Business Days
8% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$239.99

This product was last offered at the strikethrough price on
07-22-2026

$219.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Leak Detection Pump Filter

ES#432746 - 8D0906321 - Leak Detection Pump Filter - Cleans the air entering the leak detection pump - Genuine Volkswagen Audi - Audi Volkswagen

Cleans the air entering the leak detection pump

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
432746
Mfg#:
8D0906321
Ships in 3 Business Days
8% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$119.99

This product was last offered at the strikethrough price on
07-22-2026

$109.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Solenoid Valve - Priced Each

ES#4883338 - 037906283C - Solenoid Valve - Priced Each - Common cure for DTC P0441 - Rein - Audi Volkswagen

Common cure for DTC P0441 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4883338
Mfg#:
037906283C
In Stock
$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Connecting Hard Pipe

ES#284779 - 079121070T - Connecting Hard Pipe - Middle pipe section for the air pump. - Genuine Volkswagen Audi - Audi

Middle pipe section for the air pump. From VIN 8E-5-030001, split is in the 2005 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
284779
Mfg#:
079121070T
Ships in 3 Business Days
8% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$236.99

This product was last offered at the strikethrough price on
07-22-2026

$216.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Emission Parts

Repairing failed emission components doesn't just turn off the check engine light so you can pass your local emissions test, it also improves performance and fuel economy. ECS stocks all common emission controls, from oxygen sensors to PCV valves.

Let us help you find the parts that fit your Audi

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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